Glossary

Anything and everything you would like a better understanding of. All in one place.

How to use this

An unaudited term is not a lie. Most producers using “spray-free” mean it exactly. The point is that you are trusting the person rather than a system — so the useful question at a stall is not “is this organic?” but “can I see your records?”. Anybody farming the way they say they are will be pleased you asked.

Certified organicAudited: Audited annually by an independent certifier against a written standard. No synthetic pesticides or fertilisers, no GMOs, animal welfare requirements, and a conversion period of about three years before produce can be sold as organic. Comes with a certificate number you can check. BioGro — certification ↗
MPI operator approvalAudited: New Zealand's organic claims are moving onto a statutory footing under the Organic Products and Production Act 2023. Operators making organic claims will need approval from the Ministry for Primary Industries by March 2028. Until then, certification by a recognised certifier is what stands behind the word, and this is the change to watch. MPI — changes to organic products law ↗
In conversionAudited: The land is being farmed to organic standards but has not finished the transition — commonly three years, and shorter for some livestock and annual crops. Produce cannot be sold as organic yet. These producers are carrying the cost of organics without the price, and they are worth supporting. AsureQuality — gaining organic certification ↗
RegenerativeNot audited: A farmer-led movement focused on rebuilding soil health: multi-species pasture, minimal tillage, living roots year round, animals integrated with cropping. Genuinely valuable practices — but no regulated definition and no third-party audit, so a regenerative farm may still use synthetic herbicides and fertilisers.
Regenerative organicAudited: Certified organic — the audited floor — plus regenerative practice, which is the active soil building on top of it. The strongest combination available, and the only one where both halves of the claim have somebody behind them.
Biodynamic / DemeterAudited: Everything organic certification requires, plus a whole-farm approach using specific field and compost preparations and a planting calendar. Certified by Demeter, the oldest organic certification scheme in the world. In New Zealand the Bio Dynamic Farming and Gardening Association is the body behind it.
Spray-freeNot audited: No pesticides applied to this crop. Says nothing about fertilisers, GMO seed, or what happened in previous seasons, and nobody audits it. Used honestly by a great many small producers — the useful thing to do is ask to see their input records, and anybody farming the way they say will be pleased you asked.
Chemical freeNot audited: Not a technical term, since everything is chemicals including water. In practice it usually means no synthetic pesticides or fertilisers. Unaudited unless it sits beside a certification that is.
Free rangeNot audited: The animals have outdoor access. That is one welfare attribute and it is the only thing the words cover: the feed may be conventional and treated, and the land may be sprayed. Not organic, and not a claim about the food.
Grass fed / pasture raisedNot audited: Describes what the animal ate, not what went on the land. A grass-fed animal can graze pasture treated with synthetic nitrogen and herbicide, and often does.
GE / GMO freeAudited: There is no commercial production of GE food crops in New Zealand, and organic certification prohibits GMOs outright. The law here is being rewritten — the Gene Technology Bill would end the long-standing restriction and set up a dedicated regulator — so the ground under this claim is moving. Organic certification remains the strongest available guarantee, because it is a standard somebody audits rather than a claim a seller makes. MBIE — gene technology regulation ↗
Food milesNot audited: How far the food travelled. A weak proxy for footprint — how something was produced usually matters far more than how it moved. Useful beside other information and misleading on its own.
KaitiakitangaNot audited: Guardianship and protection of the natural world, held as an intergenerational responsibility. Many Māori producers frame their practice through kaitiakitanga rather than through certification language — the standards often follow the tikanga rather than the other way round.
Certificate numberAudited: The reference a certifier issues to a certified operation. It is the thing that makes the claim checkable: the certifier publishes a register, and the number is how you find the farm in it. A producer using the word "organic" without one is making a description rather than a certified claim.
NaturalNot audited: Means nothing in particular. There is no standard behind it, no audit, and no agreed definition — arsenic is natural and so is botulism. On a food label it is a marketing word, and it is worth reading whatever sits beside it instead.
SustainableNot audited: Describes an intention rather than a practice, and nobody checks it. Some sustainability schemes are rigorous and audited; the bare word on a label is not one of them. Ask what specifically is being sustained, and how anybody would know.
Low spray / IPMNot audited: Integrated Pest Management: monitoring pests and spraying only when a threshold is crossed, rather than on a calendar. A real discipline that genuinely reduces chemical use, and a considerable step from conventional practice. It permits synthetic pesticides, and it is not audited unless it sits inside a scheme that audits it.
Carbon neutral / zero carbonNot audited: Emissions measured and then balanced, usually by buying offsets. The measuring may be rigorous and the offsets may be worthless, and the label does not distinguish. Says nothing at all about pesticides, soil, or animal welfare.

A better understanding of our environment

These are not claims and nobody audits them — they are how the thing works. The words growers use with each other, so that a conversation about your food is one you can follow.

Soil

Soil structure: How soil particles clump together into crumbs and blocks, and the spaces between them. Good structure lets water in, holds some of it, lets roots through and lets air reach them. It is built slowly by roots, fungi, worms and organic matter, and destroyed quickly by working wet soil or by repeated heavy traffic.
Organic matter: Anything in the soil that was once alive — dead roots, leaf litter, manure, the bodies of soil organisms. It feeds everything else, holds water and nutrients, and is the single number most growers watch. Building it takes years; losing it takes one season of hard cropping.
Humus: The dark, stable end of decomposition: organic matter that soil life has finished with and which now breaks down only very slowly. It holds water and nutrients out of proportion to its weight. The word is used loosely — soil scientists argue about whether "humus" names a real distinct substance, and the practical point is unaffected.
Topsoil: The upper layer where almost all the biology and organic matter lives, often only 100 to 300 millimetres deep. Everything grown depends on it, it forms at something like a millimetre a year, and it moves in an afternoon of wind or rain if it is left bare.
Subsoil: The layer beneath the topsoil: denser, paler, with far less biology. Roots reach into it for water and minerals if it lets them. A compacted subsoil is one of the harder problems on a farm because it cannot be fixed from the surface.
pH: How acid or alkaline the soil is, on a scale where 7 is neutral. Most pasture and vegetables prefer somewhere between 6.0 and 6.5. pH does not feed anything itself — it governs which nutrients are available, so a soil can be full of phosphorus the plants cannot reach because the pH is wrong.
Cation exchange capacity (CEC): A measure of how much the soil can hold onto positively charged nutrients — calcium, magnesium, potassium — rather than letting them wash through. Clay and organic matter both raise it. A sandy soil with a low CEC needs feeding little and often; a heavy clay holds on and can be fed less frequently.
Soil test: A laboratory analysis of a sample, reporting pH, the major nutrients, and usually CEC and organic matter. Worth doing before changing anything, because the alternative is treating a deficiency the soil does not have. Sampling properly matters more than which lab: a bad sample analysed perfectly is still a bad answer.
Compaction: Soil squeezed until the air spaces close, usually by machinery or stock on wet ground. Water sits on top instead of soaking in, roots stop at the pan, and yields fall for years. Deep-rooting plants and time will lift it; another pass with heavy gear will not.
Soil biology / the soil food web: The living part of soil — bacteria, fungi, protozoa, nematodes, arthropods, worms — and the way they eat each other and release nutrients as they go. A teaspoon of healthy soil holds more organisms than there are people on earth. Most fertility in an organic system is this community working, rather than a nutrient applied.
Mycorrhizae: Fungi that live in and around plant roots and trade with them: the fungus extends the root system enormously and brings back phosphorus and water, and the plant pays in sugars. Most land plants form these partnerships. Heavy phosphate fertiliser and repeated cultivation both suppress them.
Mycelium: The thread-like body of a fungus, spread through soil or wood as a fine white network. It is the fungus itself; a mushroom is only the fruiting part. In soil it binds particles into crumbs, which is a large part of why undisturbed ground has better structure.
Worm castings: Worm manure — soil and organic matter that has passed through an earthworm. Higher in available nutrients and microbial life than the material that went in, and physically stable, so it holds together in water. The basis of vermicast and worm-tea products, and one of the clearest signs of a soil in good heart.
Vermicomposting: Composting with worms rather than heat: food scraps and bedding fed to a worm bed, producing castings and a liquid run-off. Slower than hot composting and gentler, so it keeps more of the nitrogen. Suits a household or a market garden more than a farm-scale operation.
Mineralisation: The process by which soil organisms break organic matter down and release the nutrients in it as forms plants can take up. It is temperature and moisture dependent, which is why an organic system feeds its crops fastest in a warm, moist spring and can look hungry in a cold one.
Nitrogen fixation: Bacteria in nodules on the roots of legumes — clover, lucerne, peas, beans, lupins — pulling nitrogen out of the air and turning it into a form plants can use. It is how an organic system gets nitrogen without buying it, and it is the reason clover in the pasture is doing real work rather than being a weed.
Leaching: Nutrients washing down through the soil past the roots, and often on into groundwater and waterways. Nitrate leaches readily; phosphate mostly moves with eroded soil instead. Bare ground over winter leaches most, which is the main agronomic argument for a cover crop.
Erosion: Soil moving off the paddock in water or wind. New Zealand's steep hill country and intense rain make it a national problem rather than a local one. Cover, roots in the ground and shelter all reduce it; bare cultivated slopes are where it happens.
Salinity: Salt accumulating in soil, usually from irrigation water that evaporates and leaves its dissolved minerals behind. It draws water out of roots rather than into them, so a salty soil can look wet and behave dry. Rare in most of New Zealand and a real constraint in a few irrigated districts.
Soil carbon: Carbon held in soil organic matter. Building it improves water holding and fertility, and takes carbon out of the air while it lasts. The agronomic benefits are well established; the climate accounting is harder, because gains can be lost again quickly and measuring change against a noisy baseline is genuinely difficult.

Water

Moisture retention: How much water a soil holds after the excess has drained, and how much of that a plant can actually reach. Organic matter is the main lever: each additional percent of it holds meaningfully more water. It is why a soil in good heart carries a crop further into a dry spell than the same soil did ten years earlier.
Field capacity: The amount of water a soil holds once free drainage has stopped, usually a day or two after heavy rain. The full mark. Irrigating past it wastes water and pushes nitrate downward, which is why irrigation scheduling is about knowing where the soil sits rather than about how long the pump has run.
Permanent wilting point: The dryness at which a plant can no longer pull water out of the soil and does not recover overnight. The empty mark. The water between wilting point and field capacity is all a crop actually has, and widening that gap is most of what soil improvement does for drought.
Infiltration: How fast water enters the soil rather than running off it. Governed by structure and by what is on the surface. The same rainfall on two neighbouring paddocks can soak into one and run off the other into a stream, and the difference is usually cover and compaction.
Mulch: Anything laid on the soil surface — straw, bark, compost, living plants, paper, plastic. It slows evaporation, holds the temperature steady, suppresses weeds and stops rain hammering the surface into a crust. Organic mulches also feed the soil as they break down; plastic ones do not.
Swale: A shallow ditch dug along the contour to catch water running downhill and give it time to soak in. A permaculture staple, and a genuinely useful earthwork on dry sloping ground. On wet ground or heavy clay it can do harm instead, which is why they are laid out to the contour and not by eye.
Riparian planting: Planting the strip along a stream or drain — natives, flaxes, sedges — and usually fencing stock out of it. Filters run-off before it reaches the water, shades and cools the stream, holds the bank together and gives wildlife somewhere to be. One of the most visible things a farm can do for a catchment.
Catchment: All the land that drains into one river system. It is the unit that matters for water quality, because what happens on any part of it arrives downstream. Catchment groups — neighbours working on it together — have become one of the main ways New Zealand farmers organise around water.
Nitrate leaching: Nitrogen washing below the root zone as nitrate and into groundwater and rivers, where it feeds algae and can make drinking water unsafe. Driven by more nitrogen in the soil than the plants are using at that moment — from fertiliser, from urine patches, or from bare ground after cultivation.
Irrigation scheduling: Deciding when and how much to irrigate from soil moisture readings and the weather, rather than on a fixed rotation. Uses less water, leaches less, and usually grows more. The instruments are cheap now and the discipline is the hard part.

What goes on the land

Compost: Organic material decomposed under controlled conditions until it is stable, dark and sweet-smelling. Feeds soil biology, adds organic matter and supplies nutrients slowly. Finished compost and half-rotted material behave very differently: the second robs nitrogen from the soil while it finishes, which is why immature compost can make a crop look worse before it looks better.
Hot composting: Building a heap large enough and balanced enough to heat itself to 55–65°C, then turning it to bring the outside in. The heat kills most weed seeds and pathogens, and the process takes weeks rather than months. Organic standards generally require it for manure, for exactly that reason.
Carbon to nitrogen ratio (C:N): The balance of woody, carbon-rich material to green, nitrogen-rich material in a compost heap or a mulch — around 25 or 30 to 1 works. Too much carbon and it sits there doing nothing; too much nitrogen and it goes slimy and smells of ammonia, which is nitrogen leaving.
Green manure: A crop grown to be dug or mown back into the soil rather than harvested — mustard, lupins, oats, phacelia, buckwheat. Adds organic matter, holds nutrients over winter, and in the case of legumes brings nitrogen in. Cheaper than buying fertility and slower.
Cover crop: Anything grown to cover the ground rather than to sell: over winter, between cash crops, or under a standing crop. Stops erosion, holds nutrients that would otherwise leach, feeds soil biology and keeps living roots in the ground. Overlaps with green manure, and the difference is mostly whether it gets incorporated.
Rock dust / rock phosphate: Finely ground rock applied as a slow-release mineral source. Reactive phosphate rock is the main phosphorus input permitted in organic systems, and it releases over years rather than weeks — which suits a perennial pasture and frustrates an annual crop. Claims for exotic rock dusts as broad "remineralisers" are much less well supported.
Lime: Ground limestone, applied to raise soil pH and supply calcium. One of the most useful and least glamorous inputs there is: on an acid soil it often does more than fertiliser would, by making the nutrients already present available. Permitted in organic systems.
Dolomite: Lime that carries magnesium as well as calcium. Useful where a soil test shows magnesium is short, and a way to slowly unbalance a soil where it is not. The choice between lime and dolomite is a soil test question, not a preference.
Gypsum: Calcium sulphate. Supplies calcium and sulphur without changing pH, which is the point of it — on a soil that needs calcium but is already alkaline, lime would make things worse. Also used to help open up sodic clays.
Seaweed / kelp: Applied as a meal or a liquid extract. A modest source of trace elements and potassium, and a source of natural growth-regulating compounds. The trace element and potassium content is straightforward; the broader claims about stress tolerance have some research behind them and are often stated more confidently than the evidence supports.
Fish hydrolysate / fish emulsion: Liquid fertiliser made from fish waste. Hydrolysate is enzyme-digested and keeps more of the oils and proteins; emulsion is heat-processed and is more of a straight nutrient source. Both supply nitrogen in a form soil biology takes up readily. Both smell exactly as you would expect.
Blood and bone: Dried slaughterhouse by-product: blood for nitrogen, bone for phosphorus and calcium. A traditional slow-release fertiliser, permitted in organic systems where the source qualifies. Attracts dogs, and needs working into the soil rather than leaving on top.
Compost tea: Compost steeped in water, usually aerated, and applied as a liquid to soil or leaves. The aim is to multiply and distribute soil organisms rather than to supply nutrients. Widely used and genuinely popular with growers; the research is mixed, results vary a great deal with how it was brewed, and a badly made tea can multiply the wrong organisms.
Biochar: Charcoal made from plant material heated without oxygen, and dug into soil. It is porous and extremely stable, so it holds water and gives microbes somewhere to live and stays in the ground for a very long time. The evidence is strong on weathered tropical soils and much more mixed on temperate ones, and fresh biochar can lock up nutrients unless it is charged with compost first.
EM / effective microorganisms: A commercial mixed culture of lactic acid bacteria, yeasts and phototrophic bacteria, applied to soil, compost or effluent. Popular in New Zealand and used seriously by some good growers. Independent trial results are inconsistent, and it is a case where the enthusiasm of users runs ahead of what has been demonstrated.
Foliar feeding: Spraying dilute nutrients directly onto leaves, which take up small amounts through the surface. Good for correcting a trace element deficiency quickly. It cannot supply the bulk of a crop's needs — the quantities involved are far too small — and a foliar programme substituting for soil fertility is treating a symptom.
Synthetic fertiliser: Manufactured nutrients — urea, superphosphate, muriate of potash — supplying nitrogen, phosphorus and potassium in immediately available forms. They grow a great deal of food. They also bypass the soil biology rather than feeding it, and nitrogen applied beyond what the crop is using is what leaches. Prohibited in certified organic systems.
Urea: The most widely used nitrogen fertiliser in the world and the mainstay of conventional New Zealand pasture. Cheap and fast. A significant share can be lost to the air as ammonia if it is spread on a dry surface, and what the plants do not use is what ends up in water. Not permitted in organic systems.
Superphosphate: Rock phosphate treated with sulphuric acid to make the phosphorus immediately available. The standard phosphate input on conventional New Zealand farms for a century. Organic systems use untreated reactive phosphate rock instead, which is slower and does not carry the same cadmium load.

Growing practice

Crop rotation: Growing different crops in sequence on the same ground rather than the same one repeatedly. Breaks pest and disease cycles that depend on the host being there next year, balances what is taken out of the soil, and lets legumes put nitrogen back. The oldest tool there is and still the most effective.
No-till / minimum tillage: Sowing into undisturbed ground rather than ploughing or rotary hoeing first. Keeps soil structure, fungal networks and organic matter intact and stops erosion. Conventional no-till usually relies on herbicide to kill the previous crop; organic no-till has to do it with mowing, rolling or mulch, which is harder and is an active area of work.
Tillage / cultivation: Working the soil — ploughing, discing, rotary hoeing — to prepare a seedbed or kill weeds. It gives a flush of nutrients as organic matter breaks down, and takes structure, fungi and carbon with it. Organic systems without herbicide often lean on it for weed control, which is one of the genuine tensions inside organic practice.
Polyculture: Growing several species together in the same space rather than one. More resilient to pest outbreaks and often more productive per unit area, and harder to manage and to harvest mechanically. Most market gardens are effectively polycultures at the block scale.
Monoculture: One crop over a large area. Efficient to plant, spray and harvest, and it concentrates everything that eats or infects that crop in one place. The pest pressure it creates is a large part of what the inputs are then required to solve.
Agroforestry: Growing trees and crops or pasture on the same land. Shelter, shade, deeper rooting, fodder, timber and habitat, at the cost of some light and some machinery access. Well-suited to New Zealand hill country and quietly common on farms that would not use the word.
Silvopasture: Agroforestry with grazing animals: trees over pasture, stock underneath. Shade in summer and shelter in a southerly both measurably help stock, and the roots hold hill country together.
Rotational grazing: Moving stock through small paddocks in sequence so grass is grazed hard and then rested. The rest is the point — it lets root systems recover, which is what builds soil. Common practice on good New Zealand farms and the foundation most regenerative grazing is built on.
Mob grazing: Rotational grazing pushed further: a dense mob on a small area for a very short time, then a long rest. Trampled residue feeds the soil surface. Enthusiasts report large soil gains and the controlled evidence is still building; the rest period is doing most of the work either way.
Stocking rate: How many animals a given area carries. The number behind most environmental arguments in New Zealand farming — nitrate leaching, effluent, and pasture damage all scale with it, and so does income, which is why it is contested.
Permaculture: A design approach for food systems modelled on natural ones: perennials, stacked functions, catching and storing energy, minimal external input. Strong on design thinking and observation. It is a framework rather than a standard — nobody certifies a permaculture farm, and the term carries no audit.
Market garden: Intensive vegetable growing on a small area, sold locally and often direct. Typically hand-scale or small-machinery, high crop diversity, quick successions. The scale where organic practice is most straightforward and where most new organic growers in New Zealand start.
CSA / box scheme: Community Supported Agriculture: customers subscribe to a farm's output, usually as a weekly box, and take some of the seasonal risk with the grower. Gives a small farm predictable income and cashflow before the season starts, and gives the customer whatever actually grew.
Heritage / heirloom variety: An older cultivar kept going by growers rather than by a seed company, usually open-pollinated so it comes true from saved seed. Often better flavoured and less uniform, and rarely bred for shipping or shelf life, which is why supermarkets do not carry them.
Open-pollinated: Seed that produces plants like the parent, so a grower can save it and sow it again. The alternative is F1 hybrid seed, which is vigorous and uniform in the first generation and does not come true — so it has to be bought every year.
Seed saving: Keeping seed from your own crop for next season. Builds varieties suited to your own ground over time and keeps old cultivars alive. Requires open-pollinated stock and some care about isolation, because most vegetables will cross with their relatives given the chance.
Succession planting: Sowing the same crop in small batches a fortnight or so apart rather than all at once, so it comes ready in sequence instead of all in one week. The difference between a market garden with lettuces every week and one with two hundred lettuces on the same Tuesday.
Hardening off: Acclimatising seedlings raised under cover to outdoor conditions over a week or so before planting out. Skipping it checks the plants badly, and a checked transplant often never fully catches up.
Biodiversity: The variety of living things in a place — species, and the genetic variation within them. On a farm it means hedgerows, wetlands, insects, birds, soil organisms and crop varieties. It is what makes a system able to absorb a shock rather than fail at it.
Shelterbelt: A planted line of trees or shrubs breaking the wind. Reduces stock losses and plant stress, cuts evaporation, and provides habitat and often fodder. One of the highest-return plantings on an exposed New Zealand property.

Pests and disease

Integrated pest management: Watching what is actually in the crop, knowing what level of it does real damage, and acting only when that level is crossed — starting with the least drastic option. Organic and conventional growers both use it. The discipline is in the monitoring, which is unglamorous and is most of the work.
Beneficials: Insects and mites that eat the ones eating your crop — ladybirds, hoverfly larvae, lacewings, predatory mites, parasitic wasps. An organic system tries to keep a standing population of them rather than importing them after the damage starts, which means having flowers and shelter available all season.
Insectary planting: Growing flowers specifically to feed and shelter beneficial insects — alyssum, phacelia, buckwheat, umbellifers. Many predators eat pollen and nectar as adults and only their larvae eat pests, so a crop with nothing flowering in it starves the very insects it needs.
Companion planting: Growing plants together on the grounds that one helps the other — repelling pests, attracting predators, or using the space differently. Some of it is well established, particularly anything that brings beneficials in or breaks up a monoculture visually. A good deal of the folklore around specific pairings has not held up under testing.
Trap crop: A plant grown to draw a pest away from the crop that matters, then dealt with. Works when the pest strongly prefers the trap and does not simply breed up in it and move across, which is the way it fails.
Biological control: Managing a pest with a living organism — a predator, a parasite, or a disease of the pest. New Zealand has used it at national scale and has the scars to prove the importance of doing it carefully. Modern releases are researched for years and regulated tightly.
Bt (Bacillus thuringiensis): A soil bacterium producing a protein that kills caterpillars and little else. Sprayed as a targeted insecticide and permitted in organic systems. It is specific and it breaks down in sunlight within days, which is both its virtue and the reason it needs repeat application.
Neem: Oil pressed from the seed of the neem tree, used against soft-bodied insects. It works mostly by disrupting feeding and moulting rather than by killing on contact. Permitted in some organic standards and restricted in others, and its status varies by country — check with your own certifier rather than assuming.
Pyrethrum: An insecticide extracted from chrysanthemum flowers, permitted in organic systems in its natural form. It is fast and broad-spectrum, which means it kills beneficials as readily as pests, and it is toxic to bees and to aquatic life. Natural is not the same as harmless, and this is the clearest example on the list.
Copper and sulphur sprays: The two old fungicides, both permitted in organic systems. They work and they are not benign: copper accumulates in soil and harms soil life at high loadings, which is why standards cap the annual rate. An organic vineyard or orchard managing fungal disease is usually managing its copper budget too.
Tomato–potato psyllid: A sap-sucking insect that arrived in New Zealand in the 2000s and spread the bacterium behind zebra chip in potatoes and severe losses in tomatoes and tamarillos. One of the harder pests for organic growers here, because the effective conventional answer is a systemic insecticide.
Varroa: A parasitic mite of honey bees, present throughout New Zealand since the 2000s. Untreated hives generally die. Organic beekeeping is constrained by which treatments are permitted, and it is one of the reasons certified organic honey is comparatively scarce here.
Clubroot: A soil-borne disease of brassicas that swells the roots and stunts the plant. It persists in soil for many years, which makes rotation the main defence and makes a short rotation on brassicas a slow way of ruining a block. Raising pH with lime suppresses it.
Blight: Fungal and fungus-like diseases of potatoes and tomatoes, late blight being the serious one — it can take a crop out in days in warm wet weather. Organic growers rely on airflow, resistant varieties, timing and copper, in roughly that order.
Nematodes: Microscopic roundworms, hugely abundant in soil. Most are harmless or useful, grazing bacteria and fungi and releasing nutrients as they go; a few species attack roots and cause real damage. Some predatory species are sold as biological control agents.

Trees, fruit and vines

Rootstock: The root system a fruiting variety is grafted onto. It decides how big the tree gets, how early it fruits, what soil it will tolerate and which root diseases it resists. Two apple trees of the same variety on different rootstocks behave like different plants.
Grafting: Joining a shoot of one plant onto the root system of another so they grow as one. It is how almost all fruit trees and grapevines are propagated, because most fruit varieties do not come true from seed — an apple pip produces a new variety, not its parent.
Scion: The piece of the variety you actually want, grafted onto a rootstock. Every Braeburn apple in the world descends by grafting from one tree that came up by chance in Nelson.
Pruning: Cutting to shape a plant, control its vigour, let light and air into the canopy and balance fruit against growth. Most fungal disease pressure in an orchard is decided by pruning, which is why an organic orchard is usually a more open one.
Thinning: Removing some of the set fruit so the rest grows bigger and the tree does not exhaust itself. Done chemically in conventional orchards and by hand in organic ones, which is a substantial part of the extra labour in organic fruit.
Biennial bearing: A tree carrying a heavy crop one year and almost none the next, because the effort of the first exhausted the buds for the second. Thinning at the right moment is the main way it is broken.
Chill hours: The accumulated cold a fruit tree needs over winter before it will break dormancy and flower properly. Each variety has a requirement, and warming winters are pushing some varieties out of districts where they have always grown.
Terroir: The whole set of local conditions — soil, aspect, climate, water — that a wine or a food expresses. Real, and also endlessly overstated in marketing. The useful version of it is that the same variety genuinely tastes different grown somewhere else.
Véraison: The point where grapes stop growing and start ripening: they soften, change colour and begin accumulating sugar. The moment vineyard work switches from growing a crop to deciding when to pick it.
Inter-row cover: What is grown between the rows in an orchard or vineyard. Left bare it erodes and compacts; sown to a mixed sward it holds the soil, feeds beneficial insects, competes usefully with the vines for excess vigour, and gives machinery something to drive on in the wet.
Orchard floor management: What happens in the strip directly under the trees, where the roots are and where a conventional orchard usually sprays herbicide. Organic orchards mow, mulch or cultivate it instead, and it is one of the biggest practical differences between the two systems.

Animals

Organic livestock: Animals raised under organic certification: organic feed, pasture access, no routine antibiotics or hormones, restrictions on how and when treatments may be used, and rules on space, transport and slaughter. The feed requirement is usually the hardest part in New Zealand, because certified organic supplementary feed is scarce and expensive.
Withholding period: The time that must pass between treating an animal and its milk or meat entering the food chain. Organic standards generally require a multiple of the legal period — commonly double or triple — which is one of the ways organic certification is stricter than the law rather than merely different from it.
Drenching: Dosing stock with anthelmintic to control internal parasites, usually as a liquid down the throat. Routine drenching is the conventional approach and is breeding resistant worms across the country. Organic systems rely on grazing management, mixed species and genetics instead, and treat individual animals when they need it.
Parasite management: Keeping worm burdens survivable without routine chemical control: long rotations so larvae die before stock return, grazing different species in sequence since most parasites are host-specific, keeping young stock on clean ground, and culling the animals that keep needing help.
Animal welfare: How an animal is housed, handled, fed and killed. Organic certification includes welfare requirements and audits them; "free range" covers one attribute and audits nothing. The two are often confused because both sound like they are about the animal having a better life.
Stocking density: How many animals occupy a given space at one time, as distinct from stocking rate across a season. It governs shelter, feed access, mud and disease pressure, and organic standards set minimums for space per animal that conventional systems are not held to.
Effluent: Manure and washdown water from a milking shed or a feed pad. Managed well it is fertility that would otherwise be bought; managed badly it is the single most direct route from a farm into a waterway. Storage capacity and the timing of spreading are what separate the two.
Intensive winter grazing: Wintering stock on a forage crop, usually fodder beet or kale, on the paddock where it grew. Efficient use of feed, and it produces bare wet soil, mud and run-off at the worst time of year. Regulated in New Zealand, and one of the practices the public has strong views about.
Set stocking: Leaving animals in one paddock continuously rather than rotating them. Simple, and it lets stock repeatedly graze the same regrowth, which keeps root systems short and pasture productivity down. The thing rotational grazing was invented to replace.
Homeopathy in livestock: Used by some organic and biodynamic farmers for animal health, and permitted under organic standards as an alternative to routine antibiotics. The evidence from controlled trials does not support an effect beyond placebo, and it is worth saying so plainly here: the standards allow it, and allowing something is not the same as it working.

Bees and pollination

Pollination: Moving pollen from one flower to another so fruit and seed can set. A large share of what we eat depends on it, and in New Zealand it is done by managed honey bees, by wild bees and flies, and by wind. Orchards commonly hire hives for the flowering weeks.
Pollinator decline: The long-run fall in insect pollinator numbers and diversity, driven by habitat loss, pesticides, disease and monoculture. Managed honey bee numbers can rise while wild pollinators fall, which is why hive counts are a poor measure of the problem.
Neonicotinoids: A class of systemic insecticide taken up into the whole plant, including its pollen and nectar. Strongly implicated in harm to bees and heavily restricted in the European Union. Prohibited in organic systems, and still used in New Zealand, largely as a seed treatment.
Bee forage: What bees can actually find to eat, and when. A district can be full of hives and short of food for six weeks between flowerings. Hedgerows, shelterbelts, clover and letting some things flower are what fill the gaps.
Mānuka honey: Honey from Leptospermum scoparium, defined for export by a government test against chemical markers rather than by the beekeeper's word — one of the few food claims in New Zealand with a laboratory definition behind it. Organic certification of mānuka is separate again, and concerns the hives and the land rather than the chemistry.
Organic honey: Certified honey requires organic management of the hives and a large radius of acceptable forage around them, which is difficult in a country where most land is farmed conventionally. Varroa treatment options are also constrained. Both together are why certified organic honey is comparatively scarce here.

Weeds

Weed: A plant where somebody does not want it. Not a botanical category — the same species is a weed in a carrot bed and a cover crop in the next paddock. Worth remembering when reading a claim about weed control.
Herbicide: A chemical that kills plants. The foundation of conventional weed control and prohibited in organic systems, which is the single biggest practical difference between the two ways of farming — everything else in an organic system has to work around not having it.
Glyphosate: The most widely used herbicide in the world, and the one most argued about. Regulators in most countries have assessed it as acceptable at approved use rates; the World Health Organization's cancer agency classified it as probably carcinogenic to humans, and that disagreement is genuine rather than manufactured. Prohibited in organic systems either way.
Flame weeding: Passing a burner over young weeds to burst their cells — it wilts them rather than burning them off. Used in organic vegetable growing, especially in the days between sowing a slow crop like carrots and its emergence, when the bed can be cleared with nothing else growing in it.
Stale seedbed: Preparing a bed, letting the first flush of weed seed germinate, killing it without disturbing the soil again, and only then sowing. It uses the weeds' own timing against them and is one of the most effective non-chemical techniques there is.
Weed seed bank: The reservoir of viable weed seed already in the soil, often tens of thousands per square metre. Cultivation brings some of it to the surface to germinate; a season of letting weeds set seed tops it up for years. Most weed management is really seed bank management.
Living mulch: A low-growing cover left in place while the crop grows through or beside it, rather than incorporated first. Suppresses weeds and holds the soil, and competes with the crop, so the balance is delicate and worth trialling on a small area before committing a block.

Biodynamics

The biodynamic preparations: Nine numbered preparations, 500 to 508, made from manure, silica, and specific herbs, applied to fields or added to compost in very small quantities. They are the practical core of biodynamic method and are required by Demeter certification. Controlled trials that separate their effect from the composting, rotation and general care around them have generally not found much — which is a statement about the preparations rather than about biodynamic farms, many of which are excellent.
Horn manure (500): Cow manure packed into a cow horn, buried over winter and dug up in spring, then stirred into water and sprayed on the soil at very low rates. The soil preparation, associated with root growth and soil life.
Horn silica (501): Finely ground quartz treated the same way as horn manure but buried over summer, and sprayed onto the leaves rather than the soil. The light and ripening preparation, associated with quality and flavour rather than with growth.
Biodynamic planting calendar: A calendar dividing the month into root, leaf, flower and fruit days according to the moon's position, used to time sowing and harvest. Widely followed and part of biodynamic practice. Attempts to demonstrate the effect under controlled conditions have not succeeded, and growers who follow it generally also observe their own ground closely, which is harder to separate out than it sounds.
Demeter: The certification body for biodynamic farming, and the oldest organic certification scheme in the world. Demeter certification requires everything organic certification does, plus whole-farm practice and the preparations, and it is independently audited. In New Zealand the Bio Dynamic Farming and Gardening Association administers it.
Cow pat pit (CPP): A fermented preparation of cow manure with basalt dust and eggshell, matured in a pit and used as a soil inoculant and compost activator. A New Zealand and Australian biodynamic staple, easier to make and use at scale than the horn preparations.

Measuring and testing

Brix: Dissolved solids in plant sap or juice, read off a refractometer — mostly sugars. Used to decide when fruit is ripe, and promoted in some circles as a general measure of crop quality or nutrient density. As a picking decision it is sound; as a proxy for how nutritious food is, the claim runs well ahead of the evidence.
Dry matter: What is left of a feed or a crop with the water taken out. The honest way to compare feeds, because fresh weight mostly measures water — a tonne of grass and a tonne of hay are completely different amounts of food.
Yield: How much comes off a given area. The number conventional systems are optimised for, and comparing it between systems is harder than it looks: organic yields are often lower per hectare and the comparison usually leaves out the inputs, the years, and what happened to the soil.
Nutrient density: How much nutrition a food carries per unit of weight or energy. Studies comparing organic and conventional produce find some consistent differences — more of certain antioxidants, less cadmium, fewer pesticide residues — and the differences are smaller than the marketing on either side suggests.
Visual soil assessment: Digging a spade square and looking at it: structure, colour, smell, roots, worms. A standard scoring method exists for it in New Zealand. It costs nothing, takes ten minutes, and tells you things a laboratory report cannot.
Life cycle assessment: Adding up the environmental burden of a product across its whole life — production, processing, transport, use, disposal. Rigorous in method and extremely sensitive to where the boundaries are drawn, which is why two honest assessments of the same food can disagree.

How certification works

Certifier: The independent body that audits a farm against a standard and issues the certificate. In New Zealand the main ones are BioGro, AsureQuality, Demeter through the Bio Dynamic Farming and Gardening Association, and Organic Farm New Zealand. They are paid by the farms they audit, which is the standard arrangement worldwide and is why their independence rests on accreditation rather than on who signs the cheque.
Standard: The written document a farm is audited against — what may be used, what must be recorded, what the conversion period is, how animals must be kept. Different certifiers work to different standards, and the standards are converging as New Zealand moves to a national one under the Organic Products and Production Act.
Conversion period: The time land must be farmed organically before its produce can be sold as organic — commonly three years, and sometimes shorter for livestock and annual crops depending on what was applied and when. It exists so that residues clear and the system actually changes, rather than the label changing.
Audit: The annual on-site inspection: someone independent walks the property, reads the records, checks what was bought and what was applied against what was harvested and sold, and can take samples. It is the difference between a claim and a checked claim, and it is the entire reason this site distinguishes the two.
Input records: The log of everything applied to the land and everything brought onto it — what, where, when, how much, from whom. Keeping them is most of the day-to-day work of being certified, and being able to show them is what makes an uncertified "spray-free" claim worth something.
Traceability: Being able to follow a product back from the shelf to the paddock it grew in. Required by organic standards and by food safety law generally. It is what makes a recall possible and what makes a fraudulent organic claim eventually detectable.
Parallel production: Growing the same crop organically and conventionally on one property. Certifiers restrict it tightly and some prohibit it outright, because it is the easiest way for a certified label to end up on uncertified produce — deliberately or by simple mix-up in a busy shed.
Buffer zone: An unsprayed strip between certified land and a neighbour who sprays, to catch drift. Required by organic standards, and the produce grown in it usually cannot be sold as organic. The cost of a neighbour's practice, carried by the organic grower.
Spray drift: Pesticide carried on the wind beyond where it was applied. It is the main way a certified organic block loses certification through no fault of its own, and one of the more common sources of friction between neighbours in horticultural districts.
Residue testing: Laboratory analysis of produce or soil for pesticide residues. Used by certifiers as a spot check rather than as the basis of certification — the system audits the process, and tests to confirm that the process is being followed.
Maximum residue limit (MRL): The highest concentration of a pesticide residue legally allowed on a food. An MRL is a regulatory compliance limit built from approved use patterns rather than a line between safe and unsafe, and food can be well under every MRL and still carry residues of several different compounds.
IFOAM: The international federation of organic agriculture movements, which maintains the family of standards most national schemes are built from and accredits certifiers. It is why an organic certificate issued here means something to a buyer in Europe.
Equivalence arrangement: A government-to-government agreement that each country's organic certification will be accepted by the other, so produce does not have to be certified twice. New Zealand's organic exports depend on these, and they are a large part of why the country is putting organic claims onto a statutory footing.

Climate and rules

Biogenic methane: Methane from living systems — in New Zealand overwhelmingly from ruminant animals. It warms far more strongly than carbon dioxide and breaks down in the atmosphere within a couple of decades rather than persisting for centuries, which is why it is accounted for separately from the long-lived gases.
Nitrous oxide: A greenhouse gas released from nitrogen in soil, principally from urine patches and nitrogen fertiliser. Long-lived and very potent. Reducing applied nitrogen reduces it directly, which is one of the places organic practice and emissions policy point the same way.
Split-gas approach: Treating short-lived and long-lived greenhouse gases separately rather than converting everything into one number, because a gas that clears in twenty years and one that lasts for centuries need different targets. New Zealand's climate framework works this way.
Agricultural emissions pricing: Charging farms for their greenhouse gas emissions. New Zealand has been working toward it for years; the design has been proposed, redesigned and deferred more than once, and the sector partnership that produced the first scheme no longer exists. The Climate Change Commission's advice is the stable thing to read rather than any given announcement. Climate Change Commission — agricultural emissions ↗
Freshwater farm plan: A regulated plan identifying the freshwater risks on a property and what will be done about them, certified and audited. The rollout began by region, was paused nationally to be simplified, and the thresholds for who needs one have changed — so whether it applies to a given farm depends on the region and on when you ask. MPI — freshwater farm plans ↗
MPI: The Ministry for Primary Industries. Regulates food safety, biosecurity and primary production in New Zealand, runs the Official Organic Assurance Programme that underpins organic exports, and is the body operators will need approval from as organic claims move onto a statutory footing.
Biosecurity: Keeping pests and diseases out of the country, and containing the ones that arrive. New Zealand's isolation is the reason so much can be grown here without the pest pressure of elsewhere, and the reason an incursion is so costly. Every grower is part of the system whether they think about it or not.
Regional council: The layer of local government responsible for water, air, soil and land-use consents. Most environmental rules a farm actually meets come from its regional council rather than from central government, which is why the answer to "is that allowed" is usually "where are you".

The food system

Food sovereignty: The idea that people and communities should have a say over their own food system — what is grown, how, and by whom — rather than having it decided by distant markets. Distinct from food security, which is about having enough; sovereignty is about who decides.
Food security: Reliable access to enough safe, nutritious food. It is a live issue in New Zealand despite the country producing food for tens of millions of people, because producing food and being able to afford it are different problems.
Local food: Food grown near where it is eaten. The benefits are real and are mostly not about transport emissions — they are freshness, money staying in the district, knowing who grew it, and having somewhere to ask questions.
Seasonal eating: Eating what is being harvested now rather than what has been stored, shipped or grown under heat. Usually cheaper, usually better, and the main constraint on a box scheme — which is why a box in August looks nothing like a box in February.
Farm gate: Buying directly from the producer at the property. The shortest possible chain: the grower keeps the whole price and the buyer can see the place the food came from and ask about it.
Short supply chain: Any arrangement with few or no intermediaries between grower and eater — farm gate, farmers' markets, box schemes, direct wholesale to a restaurant. More of the retail price reaches the person who grew it, which for most produce is a small fraction under the usual arrangement.
Post-harvest: Everything after picking: cooling, washing, grading, packing, storing, transporting. Most of the quality a customer experiences is decided here rather than in the paddock, and it is where a lot of small operations lose produce they had already grown.
Food waste: Food grown and not eaten. A large share of it never leaves the farm, rejected on appearance rather than on quality — which is a grading standard problem rather than a growing one, and one that direct selling largely sidesteps.
Circular / closed loop: A system where outputs become inputs: crop residue and manure composted back onto the land, food scraps returned, nutrients cycling rather than being bought at one end and lost at the other. The ideal an organic farm works toward and rarely reaches completely.
Externalities: Costs of production that the producer does not pay and somebody else does — nitrate in a town's drinking water, soil in a harbour, greenhouse gases. Cheap food is often cheap because some of what it costs has been moved onto a party who never agreed to carry it.
True cost accounting: Counting the externalities as part of the price of food. Studies attempting it consistently find conventional production more expensive than it appears and organic production closer to its sticker price. The method is contested and the direction of the finding is not.
Greenwashing: Marketing that makes a product sound better for the environment than it is — a leaf on the packet, a vague word, a certification-shaped logo that certifies nothing. The reason this glossary separates what is audited from what is asserted, and the reason the distinction is drawn on every card.

Te ao Māori

Kaitiaki: A guardian or steward. In practice, the person or group who holds responsibility for the wellbeing of a place and answers for it. Kaitiakitanga is the exercise of that responsibility, held across generations rather than for a season.
Mauri: The life force in a thing — a person, a river, a forest, a soil. Freshwater management in New Zealand increasingly talks about the mauri of a waterway, meaning its health understood as something whole rather than as a set of readings.
Whenua: Land. The same word means placenta, and the connection is the point: land as the thing that sustains and that people belong to, rather than an asset that is owned.
Kai: Food. Kai sovereignty and kai resilience — communities being able to feed themselves from their own place — are a live and growing part of how food is talked about in New Zealand.
Mahinga kai: Places where food is gathered and grown, and the practice of doing so — eels, watercress, shellfish, birds, cultivated ground. A legal and cultural concept that appears in Treaty settlements and in freshwater policy, because a river that cannot feed people has lost something measurable.
Maramataka: The Māori lunar calendar, used to time planting, harvesting and fishing according to the phases of the moon and the signs in the environment. Distinct from the biodynamic calendar in origin and in detail, and grounded in generations of observation of specific places.
Rāhui: A temporary prohibition on taking from an area — a stretch of coast, a forest, a river — to let it recover or out of respect after a death. A conservation tool that predates the word conservation.
Manaakitanga: Hospitality, generosity, care for others — and the mana that comes from extending it. It is why food matters at a gathering, and it is a reasonable description of what a good producer is doing when they feed people well.
Tikanga: The right way of doing things — customs and protocols, grounded in values rather than in rules. Many Māori producers describe their practice as following tikanga, with organic standards happening to agree rather than being the reason.

← The longer explanations, with sources