The Record
| Word | What it means |
|---|---|
| Modelled | Worked out by the app from public data. The number says which model. |
| Measured | Read by a device at a time. The number says which device and when. |
| Record | One thing that happened on a field: a spray, a spread, a move, a harvest, a note. |
| Evidence grade | How strongly a record proves itself: in the field when it was written within the day, on the field, with a photo or a reading; typed later when it was not. |
| Pack | The compliance pack: every record an inspector asks for, as one download, with a cover. |
| Regime | One set of rules the farm answers to: NVZ, SFI, the spray record, Red Tractor. |
| Key date | A date the law sets for a field: a closed period, a heap’s move-by date, a cutting period. |
| Decision | One line on Today: a rule, a window or a reading that wants something this week. |
The Land
| Word | What it means |
|---|---|
| Field | An outline on the map with a crop. The unit everything else attaches to. |
| Zone | A part of a field you treat differently: a wet corner, a sandy headland. |
| Stable | Zones that keep their order year after year in the satellite archive. Only a stable field can export a rate plan. |
| NDVI | A satellite measure of how green a field is. Greener is a stronger canopy. |
| Cover | How much grass is on a field, in kilograms of dry matter per hectare. |
| Residual | The cover to leave when the herd moves off, about 1,500 kg DM/ha. |
| Feature | Something on the farm map that is not a field: a store, a heap, a ditch, a borehole. |
| Siting check | The distance the rules want between a feature and water, measured on the map. |
The Rules
| Word | What it means |
|---|---|
| Closed period | The weeks each year when certain manures and fertilisers must not be spread on a field. Set by the nitrate regulations. |
| N-max | The most nitrogen a crop may get in a year, averaged over the farm. |
| NVZ | A nitrate vulnerable zone. Most of England is one; Wales and Northern Ireland are whole-territory. |
| SSAFO | The rules on where a slurry store, a silage clamp or a fuel store may sit, and how far from water. |
| RB209 | The AHDB nutrient management guide. The nutrient plan uses its tables. |
| MAPP number | The approval number on a spray product’s label. |
| LERAP | The buffer strip rule beside water when spraying. |
| SFI | The Sustainable Farming Incentive, England’s agri-environment scheme. |
| CPH | The county / parish / holding number. What an inspector asks for first. |
| SBI | The Single Business Identifier, the number the Rural Payments service knows the business by. |
The Weather
| Word | What it means |
|---|---|
| Delta-T | The gap between the air temperature and the wet-bulb temperature. Whether a spray will land and stay. |
| Window | The run of hours in which a job can be done: a spray window, a drilling window. |
| GDD | Growing degree days, the heat a crop has had. What the growth stage is worked out from. |