S4ag Grains

---
name: s4ag-grains
description: "Growing grains at small scale — wheat, oats, rye, barley, spelt, buckwheat, corn. Use when the user asks about grain variety selection, seeding, small-scale harvest, grain rotation, or grain storage."
allowed-tools: [Read]
---

# Grains

Growing grain at small scale — for food self-sufficiency, stock feed, or a niche market — is one of the most satisfying things a farm can do, and one of the easiest to get wrong in the first season. The goal is a clean, harvestable crop at the right moisture content, from varieties suited to your soil and climate, within a rotation that leaves the ground in better biological shape than you found it. This skill covers the four decisions that determine whether that happens: which variety to grow, how to establish it, when and how to harvest at small scale, and how to fit grain into a rotation without degrading the soil food web.

**How this skill works:** Each sub-tool pauses at a **Checkpoint** to confirm the assumptions it is about to build on before producing output. A recommendation built on a wrong assumption wastes time and money — confirm the checkpoint before acting. Each sub-tool ends with **Next steps** — the skills worth running once you have acted on this one.

---

## Expert Lineage

*The thinkers whose frameworks underpin this skill — and what they specifically discovered that changes how you farm.*

**Wes Jackson — The Land Institute and Perennial Grain Research**
Jackson founded the Land Institute in 1976 with a single observation: annual grain monocultures are ecologically unsustainable because they expose bare soil, require nitrogen inputs, and destroy prairie ecosystems. His specific contribution to this skill: Kernza (perennial wheatgrass) now yields commercially, and perennial polycultures of grains and legumes outperform annual monocultures on degraded soils over time. For small-scale growers today, his framework means: treat grain as one component of a diverse system, not the system itself — and always look for how perennial elements can reduce tillage and biology loss in the grain enterprise.

**Masanobu Fukuoka — No-Till Grain as Proof of Concept**
Fukuoka grew wheat and rice for decades without tillage, fertiliser, or herbicide at his farm in Shikoku, Japan. His specific finding: direct-seeded grain oversown into a living clover mulch, with straw returned to the soil after harvest, maintained yields equivalent to his neighbours' conventional crops while building soil organic matter year on year. The actionable implication: a small-scale grain grower who undersows with clover and returns straw has a biological system that reduces or eliminates the fertility gap between harvests. The food web does the work Fukuoka refused to do with chemicals.

**Gary Paul Nabhan — Heritage Grain Adaptation**
Nabhan documented that landrace grain varieties — those developed through generations of farmer selection in a specific place — consistently outperform modern varieties on marginal soils without external inputs. His research in arid south-western America showed that Sonoran white wheat grown by O'odham farmers yielded on rainfall that would cause modern varieties to fail completely. For any small-scale grower on difficult ground: heritage and landrace varieties carry place-adapted resilience that modern breeding sacrificed for input-responsive yield. The variety decision is made once; its consequences last the whole season.

**William Albrecht — Grain Quality as a Mineral Question**
Albrecht's forty years of soil science at Missouri showed that protein content, mineral density, and flavour in wheat are functions of soil mineral balance, not nitrogen application rate. His finding: high-nitrogen production maximises bushels but dilutes protein concentration and micronutrient density. This is why heritage wheats grown on balanced soils taste different — and why small-scale grain grown for quality markets should be managed for mineral balance, not nitrogen push. Read the soil test before the seed catalogue.

**André Voisin — Soil-Crop Relationship and Mineral Transfer**
Voisin's research demonstrated that the mineral content of crops directly reflects the mineral status of the soil they are grown in — and that soil mineral depletion through grain harvest without return is a predictable multi-generational process. His implication for grain growers: every tonne of grain removed from a field takes minerals with it. Without deliberate replenishment — through compost, cover crops, or mineral amendments — continuous grain growing depletes the biological and mineral capital of the soil even when yields remain high.

**Elaine Ingham — The Biology beneath the Grain**
Ingham's food web framework reveals why grain monocultures are biologically destructive: annual tillage disrupts fungal networks, bare soils between harvest and establishment starve the food web, and high-nitrogen fertility drives bacterial dominance at the expense of the fungi that are essential for phosphorus cycling and soil structure. Her most actionable finding for grain growers: a grain field with a clover or vetch undersow — even terminated before canopy closes — maintains fungal hyphal networks through the season and feeds them year-round through root exudates. The undersow is not just a nitrogen source; it is a biological life-support system for the soil food web.

---

## Which tool fits

| You need to... | Tool |
|---|---|
| Choose a grain variety for your climate, soil, and purpose | variety-selection |
| Decide how to prepare the seedbed and establish the crop | establishment |
| Plan the harvest and hit the right moisture for storage | harvest-management |
| Fit grain into a rotation that improves soil health | rotation-planning |

## Routing Decision

- **Starting out, don't know which grain to grow** → variety-selection first; it determines what establishment method applies
- **Already decided on the variety, need to know how to sow it** → establishment
- **Crop is standing and you need to know when and how to cut it** → harvest-management
- **Planning next year's whole rotation** → rotation-planning
- **Soil is degraded or compacted from past grain cropping** → run /s4ag-soil first, then return to rotation-planning

---

## Variety Selection

*Matches the grain species and variety to your climate, soil, intended use, and scale.*

The variety decision sets the ceiling for the whole season. A variety unsuited to your climate or soil will underperform regardless of everything else you do. A variety suited to your purpose — whether that is bread flour, porridge oats, animal feed, or a heritage landrace — cannot be substituted late. Make this decision before ordering any inputs.

**Step 1: Choose the grain species.**

| Species | Best use | Soil preference | Climate |
|---|---|---|---|
| Winter wheat | Bread, general purpose | Well-drained loam or clay loam | Most temperate zones |
| Spring wheat | Bread, shorter seasons | Well-drained loam | Cool-short season or late start |
| Oats | Porridge, stock feed, straw | Tolerates acidic, heavier soils | Wet, cool climates |
| Rye | Bread, stock feed, cover | Tolerates poor, sandy, acid soils | Cold, short-season, marginal land |
| Barley | Malting, stock feed | Well-drained, lower pH tolerance | Drier, moderate climates |
| Spelt | Artisan bread, direct sale | Tolerates lower fertility | Moderate, versatile |
| Buckwheat | Pancakes, cover crop, pollinators | Not true grain — loves poor soils | Warm season, frost-sensitive |
| Corn/maize | Fresh eating, flour, stock feed | Deep, fertile, warm soil | Long frost-free season |

**Step 2: Match to your purpose.**

- **Bread/artisan flour market:** Heritage wheat (Red Fife, Marquis, Einkorn, Emmer, Spelt) — higher protein, complex flavour, premium price. Lower yield than modern varieties. Choose if your market values provenance.
- **Stock feed or home use:** Modern open-pollinated varieties — higher yield per acre, easier to source, perform reliably. No flavour premium but lower cost of production.
- **Self-sufficiency:** Rye or oats — lowest input requirements, most forgiving on marginal or acid soils, require least equipment to harvest small scale.
- **No-till or minimal disturbance:** Winter rye or winter wheat — can be established by oversowing into stubble or a terminated cover crop with minimal soil movement.

**Step 3: Heritage and landrace varieties — when they pay.**

Heritage varieties pay when:
- You have a direct market willing to pay a premium for provenance and flavour
- Your soil is low-fertility or marginal — heritage varieties built their adaptation under those conditions
- You are reducing external inputs — heritage varieties are less demanding of nitrogen and fungicide than modern semi-dwarf varieties
- You want to save seed — open-pollinated varieties can be saved; F1 hybrids cannot

Modern varieties pay when:
- You need maximum yield per acre
- You are selling into commodity or feed markets
- Your soil fertility is high and well-managed — modern varieties are bred to respond to high nitrogen

**Seed sources:** Heritage grain seed networks exist in most temperate countries. In the UK: Brockwell Bake, Grist, Emorsgate Seeds. In North America: Kusa Seed Society, Restoration Seeds, Breadtopia, Uprising Organics. Local small-scale grain networks often have the best-adapted landrace material — worth asking before ordering from a catalogue.

**Checkpoint — confirm before finalising:**
- What is the primary purpose of this grain — artisan sale, stock feed, or home use? The answer determines whether heritage variety premium or modern variety yield is the priority.
- What is the frost-free season length and typical summer moisture pattern in your location? This eliminates unsuitable species before the variety question is reached.
- Do you have seed-saving intent? If yes, only open-pollinated varieties are suitable — hybrids cannot be saved without yield collapse.

A variety recommendation built without knowing the purpose and climate is likely to be wrong in one of these dimensions — confirm before sourcing seed.

**Output:**
```
VARIETY RECOMMENDATION

Farm location/climate: [climate zone, key constraints]
Purpose: [bread / stock feed / self-sufficiency / artisan sale]
Seed-saving intent: [yes / no]

RECOMMENDED SPECIES: [species]
RECOMMENDED VARIETY: [variety name]
Variety type: [heritage / modern OP / hybrid]
Reason: [2-3 sentences linking variety to purpose and conditions]

ALTERNATIVE: [second variety if first is unavailable]
Where to source: [seed supplier or network]

WHAT TO AVOID AND WHY:
[varieties or species that don't suit this situation — brief reason]
```

**Next steps:**
- Run **establishment** (within this skill) — variety determines seeding rate, timing, and bed preparation needs.
- `/s4ag-soil` — before sowing, confirm mineral balance suits the variety's fertility requirements.
- `/s4ag-seeds` — if saving seed, understand isolation distances and selection criteria for maintaining variety quality.

---

## Establishment

*Plans the seedbed, seeding rate, timing, and undersowing strategy for a clean, vigorous establishment.*

Poor establishment is the most common cause of grain crop failure at small scale. Thin stands let weeds dominate before canopy closure; too-dense seeding creates disease risk and lodging. The seedbed needs to be firm enough for good seed-soil contact and fine enough for even germination — but not tilled any deeper than necessary.

**Step 1: Seedbed preparation.**

The seedbed goal is: firm base, fine surface tilth, minimal soil disturbance, and no major weed seed germination event triggered by tillage.

| System | Method | Tillage depth | Biological impact |
|---|---|---|---|
| Conventional | Plough and power harrow | 20–30cm | High — disrupts fungal networks, oxidises OM |
| Reduced till | Single-pass disc or tine | 5–10cm | Moderate |
| Strip till | Tilled strips only | 5–10cm in strip | Low — biology preserved between strips |
| No-till oversow | Direct into stubble or terminated cover | 0–2cm slot | Minimal — preferred if establishment succeeds |
| Broadcast and roll | Broadcast seed, rolled for contact | 0 | No disturbance — requires dense mulch or wet conditions |

**Biological note (Ingham lens):** Every tillage pass breaks fungal hyphal networks and temporarily spikes bacterial activity. On soils with active biology, a no-till or minimum-till establishment allows the food web to remain intact through the season. The undersow strategy below compensates for any tillage that is unavoidable.

**Step 2: Seeding rates.**

These are indicative — adjust upward on poor seedbeds, downward on ideal conditions.

| Species | Target plant population | Seeding rate (approx.) |
|---|---|---|
| Winter wheat | 200–350 plants/m² | 150–200 kg/ha |
| Spring wheat | 250–350 plants/m² | 175–225 kg/ha |
| Oats | 200–300 plants/m² | 150–180 kg/ha |
| Rye | 200–300 plants/m² | 120–160 kg/ha |
| Barley | 250–350 plants/m² | 150–200 kg/ha |
| Spelt | 200–250 plants/m² | 200–250 kg/ha (unhulled) |
| Buckwheat | 35–50 plants/m² | 60–90 kg/ha |
| Corn | 7–9 plants/m² | 20–25 kg/ha |

For small-scale (under 1 ha): use a hand or pedal broadcaster for small acreages; a walk-behind seeder or grain drill if you have access to one. Accurate seed placement dramatically improves establishment consistency over broadcasting.

**Step 3: Sowing timing.**

| Species | Sowing window | Notes |
|---|---|---|
| Winter wheat/rye/barley | September–November (northern hemisphere) | Must establish before first hard frost |
| Spring wheat/barley/oats | March–April | Sow as soon as ground workable |
| Spelt | October–November | Sow early; slower to establish than wheat |
| Buckwheat | After last frost risk | Frost-kills at any growth stage |
| Corn | When soil reaches 10°C consistently | Soil temp more important than calendar date |

**Step 4: Undersowing — the biological upgrade.**

Undersowing a legume or diverse herb mix into the grain crop pays multiple dividends:
- Nitrogen fixation credited to the following crop
- Living root year-round maintains food web energy supply
- Ground cover after harvest reduces erosion and bare soil
- Weed suppression after grain canopy opens at senescence

**Undersow timing:** Broadcast the undersow mix at cereal tillering (growth stage 21–23, early spring for winter cereals) or at corn/buckwheat establishment. Seed into the crop at a rate that establishes ground cover without competing with the grain before canopy closure.

**Recommended undersow mixes:**

| Purpose | Mix |
|---|---|
| Nitrogen and biology | Red clover + white clover (2:1 by weight) |
| Diverse food web feeding | Red clover + plantain + yarrow + chicory |
| Weed suppression post-harvest | White clover + ryegrass (if livestock will graze aftermath) |
| No-till system | Hairy vetch (winter cereals) / crimson clover (spring cereals) |

**Checkpoint — confirm before finalising:**
- What equipment is available for sowing — grain drill, hand broadcaster, walk-behind seeder? Equipment determines which seedbed preparation is feasible.
- Is the ground wet or dry at the time of establishment? No tillage or establishment on wet soil — compaction damage outlasts any short-term gain.
- Is an undersow planned? If yes, the undersow species must be confirmed before broadcast timing, as some undersow mixes compete with the grain if sown too heavily.

Recommending a no-till establishment to someone with no roller or drill, or a conventional plough system to someone on a fragile soil, creates problems — confirm equipment and soil condition first.

**Output:**
```
ESTABLISHMENT PLAN

Species/variety: [species — variety]
Area: [ha or acres]

SEEDBED PREPARATION
Method: [plough / min-till / no-till / strip-till]
Timing: [when to prepare]
Tillage depth: [cm]
Notes: [any specific seedbed requirements]

SEEDING
Method: [drill / broadcaster / hand]
Seeding rate: [kg/ha]
Sowing date: [target date or window]
Seed depth: [cm]

UNDERSOW
Species/mix: [mix]
Seeding rate: [kg/ha]
Timing: [when to broadcast]

ESTABLISHMENT RISKS TO WATCH
- [risk 1 — e.g. slug damage, poor germination window, competition from undersow]
- [risk 2]
```

**Next steps:**
- Run **rotation-planning** (within this skill) to confirm what preceded this crop and what follows.
- `/s4ag-soil` — if seedbed preparation revealed compaction or poor structure, address biology before or alongside establishment.
- `/s4ag-pests` — slugs are the most common small-scale grain establishment pest; confirm threshold and response before sowing if previous crop was a cover or grass.

---

## Harvest Management

*Plans the harvest decision and logistics for small-scale grain — timing, moisture, equipment, and immediate post-harvest handling.*

Harvesting at the wrong moisture content is the most expensive mistake in small-scale grain growing. Too wet and the grain will heat and mould in storage; too dry and you lose yield to shattering and pay for moisture you removed in the field. The harvest window is narrow — understand it before the crop reaches it.

**Step 1: Reading harvest readiness.**

Harvest timing is moisture-driven, not calendar-driven. These are the field indicators to watch:

| Indicator | Meaning |
|---|---|
| Straw has turned golden and stiffened from bottom up | Approaching maturity — begin monitoring daily |
| Grain head has turned from green to gold or amber | Physiological maturity is near |
| Grain is firm when bitten — no milky liquid | Grain is doughing or hard dough stage |
| Grain rattles in the head | Close to harvest moisture |
| Straw is snapping rather than bending | Grain dry enough for combine harvest |
| Grain separates cleanly when rubbed between palms | Ready — check moisture immediately |

**Target moisture content at harvest:**

| Species | Harvest moisture (safe for storage without drying) |
|---|---|
| Wheat | 14% or below |
| Oats | 14% or below |
| Rye | 14% or below |
| Barley | 15% or below |
| Spelt (hulled) | 14% or below |
| Corn | 15% or below (field dry) |
| Buckwheat | 16% or below |

Use a grain moisture meter. They cost £30–£80 and prevent expensive storage losses. Do not guess moisture content from appearance alone.

**Step 2: Small-scale harvest equipment options.**

Most small-scale grain growers face the equipment question before anything else. Options in order of scale:

| Method | Area suited | Equipment needed | Grain quality |
|---|---|---|---|
| Hand scythe + threshing | Under 0.1 ha | Scythe, threshing board or tarpaulin, winnowing | Excellent — gentle on grain |
| Walk-behind reaper-binder | 0.1–0.5 ha | Reaper-binder (hire or own), sheaves, stooks | Very good — allows field drying in sheaf |
| Small combine hire | 0.5 ha and above | Combine hire from neighbouring farmer or contractor | Good — check header settings for small area |
| Local hire or cooperative | Any area | Arrange early — demand in harvest window is high | Depends on machine and operator |

**Stooking (sheaf drying) — the small-scale advantage:** Cutting and stooking before the grain is combine-dry allows field drying. Grain in sheaves can be cut at 18–20% moisture and dry to 14% or below in the stook over 1–3 weeks of dry weather. This removes time pressure from the harvest window and avoids the need for mechanical drying. It requires a reaper-binder or hand scything — not a combine.

**Step 3: Post-harvest handling.**

| Step | Action | Why |
|---|---|---|
| Moisture check | Measure immediately at harvest | Determines whether grain can go straight to storage |
| Sample test | Take a sample from multiple parts of the load | Moisture varies across a field |
| Winnowing or cleaning | Remove weed seed, chaff, dust | Reduces storage risk; improves sample quality |
| Bulk or bag | Bag if storing small quantities; bulk bin for larger | Bags allow airflow if loosely filled; bulk needs airflow management |
| First week | Check temperature in store daily | Grain heating in the first week signals moisture problem |

**Straw return — the biological decision:** Returning chopped straw to the field rather than removing it is a food web decision. Straw is high-carbon material that feeds the fungal decomposer community over winter. If straw has value as bedding or feed, it can be removed — but then the carbon must be replaced through compost or a high-carbon cover crop. Never leave bare soil after harvest. Always follow with a cover crop or undersow.

**Checkpoint — confirm before finalising:**
- What equipment is available or accessible for harvest? The method changes timing, moisture targets, and logistics entirely.
- What is the current weather forecast for the harvest window — and is there covered storage available if grain needs to be cut wet?
- Is the grain destined for immediate sale, storage, or milling? Sale into commodity markets has strict moisture and specification requirements; home use is more flexible.

A harvest plan written without knowing the equipment situation will not survive contact with the crop — confirm before the crop reaches maturity.

**Output:**
```
HARVEST PLAN

Crop: [species — variety]
Area: [ha or acres]
Expected harvest window: [date range]

HARVEST METHOD: [hand / reaper-binder / combine hire / other]
Target moisture at cut: [%]
Stooking required: [yes / no — days in field if yes]

MOISTURE MONITORING
Begin daily checks from: [approximate date or growth stage]
Moisture target for storage: [%] or below
Meter type available: [yes / no / to source]

POST-HARVEST
Cleaning method: [winnowing / cleaner / none]
Storage destination: [bags / bulk bin / sacks]
Temperature monitoring: [daily for first week]
Straw: [return to field / remove for bedding / other]

COVER CROP TO FOLLOW
Species: [cover crop]
Sowing timing: [within X weeks of harvest]
```

**Next steps:**
- Run **rotation-planning** (within this skill) — the post-harvest period is when the rotation decision is made in practice.
- `/s4ag-storage` — if grain is stored for any period, understand temperature, humidity, and pest management for grain in storage.
- `/s4ag-composting` — if straw is removed from the field, plan compost additions to replace the carbon taken off.

---

## Rotation Planning

*Designs a grain rotation that maintains soil health, breaks pest and disease cycles, and reduces input dependency over time.*

Grain monocultures are among the most biologically damaging agricultural systems. Annual tillage, high-nitrogen fertility, bare soil between harvest and establishment, and the same root chemistry year after year collapse fungal communities and build bacteria-dominated soils that are structurally poor and input-dependent. Even a simple two- or three-crop rotation with a break crop dramatically reduces this damage. The rotation is the primary soil health tool in a grain system — more important than any single input.

**Step 1: Rotation principles.**

A well-designed grain rotation achieves four things simultaneously:
1. **Disease break** — cereal pathogens (take-all, eyespot, fusarium) build up under repeated cereal cropping. Minimum: one non-cereal break every third year.
2. **Weed management** — rotating between winter and spring crops and between competitive and open canopy crops disrupts weed cycles without relying on herbicides.
3. **Nitrogen management** — legume break crops fix nitrogen and reduce or eliminate the following crop's N requirement.
4. **Soil biology recovery** — diverse root chemistries feed diverse microbial communities; the rotation is the most effective tool for maintaining food web complexity.

**Step 2: Standard rotation frameworks.**

These are starting points — adapt to your enterprise and soil.

| Rotation | Years | Comment |
|---|---|---|
| Wheat / Wheat | 2 | Minimum viable — take-all risk builds rapidly |
| Wheat / Break crop / Wheat | 3 | Standard. Break crop is the key decision. |
| Wheat / Oats / Break / Wheat | 4 | Better — two-cereal window before break |
| Wheat / Legume / Wheat / Oats | 4 | Strong — nitrogen fixed every other year |
| Wheat / Cover / Oats / Legume | 4 | Regenerative direction — cover crops become a rotation entry in their own right |

**Break crop options and their contribution:**

| Break crop | Nitrogen fixed | Disease break | Soil biology benefit |
|---|---|---|---|
| Winter field beans | 100–150 kg N/ha equivalent | Excellent cereal break | Legume root nodules feed bacterial community |
| Spring field peas | 80–120 kg N/ha equivalent | Good cereal break | As above |
| Oilseed rape | None | Good for grass weeds, poor for sclerotinia if repeated | Tap root improves drainage; high glucosinolate residues can suppress biology temporarily |
| Sunflowers | None | Good | Deep tap root; diverse root exudate chemistry |
| Diverse cover crop mix | 40–80 kg N/ha (if legume-led) | Good soil biology reset | Most biologically beneficial option — especially 5+ species mixes |
| Leys (1–3 year grass/clover) | 80–120 kg N/ha equivalent per year | Excellent disease break | Best biology rebuilder in the rotation |

**Leys — the underused tool at small scale:** A two- or three-year grass-clover ley does more to restore soil biology in a grain rotation than any input. The continuous living root system rebuilds fungal networks; the clover fixes nitrogen; the absence of tillage for two or three years allows soil structure to recover. At small scale, grazing the ley with chickens or sheep also integrates livestock into the rotation, adding biological diversity. If you have livestock or can arrange grazing, a ley phase is the highest-value rotation entry.

**Step 3: Fitting cover crops into the rotation.**

Cover crops are most powerful between a grain harvest and the next crop establishment. This is the critical bare soil window — the period when the food web is starved of root exudates and most vulnerable to weed colonisation.

| Window | Cover crop strategy |
|---|---|
| Harvest in August, next crop in October | Short-season cover (buckwheat, phacelia, mustard) — 6–8 weeks of growth |
| Harvest in August, next crop in March | Winter-hardy cover (winter rye, hairy vetch, field beans, rye-vetch mix) — maximum biology |
| Harvest in August, next crop in June | Full-season diverse mix — highest biological return |
| Continuous grain rotation with no spring gap | Undersow at tillering — maintains living roots through harvest and into autumn |

**Step 4: Soil biology monitoring in the rotation.**

Track the biological health of the rotation, not just the yield. Simple indicators:

- **Earthworm count:** Dig 30cm cube in the field after harvest. Below 10 earthworms per cube = depleted biology; above 25 = healthy. Retest annually in the same location.
- **Weed pressure:** Increasing annual weed pressure (docks, thistles, chickweed) signals a bacteria-dominated, disturbed soil food web. Perennial weeds decreasing without herbicide suggests food web recovery.
- **Aggregate stability (slake test):** Drop a small soil aggregate into water. Immediate collapse = poor structure, biology-depleted. Stable for 5+ minutes = good fungal binding and OM.
- **Smell:** Healthy soil smells earthy and rich (geosmin from actinomycetes). Dead or compacted soil smells sour or of nothing.

**Transition pathway:** A conventional continuous cereal grower can move toward a more biologically active rotation without a complete system change. The sequence that minimises financial risk:
1. Introduce a single break crop in the rotation (field beans are the most economically straightforward)
2. Add a cover crop in the first available post-harvest window
3. Undersow the following grain crop with clover
4. Progressively extend recovery periods and cover crop diversity as confidence and biology build

**Checkpoint — confirm before finalising:**
- What crops are currently in rotation, and over how many years? This reveals where disease pressure has built and what the break crop priority is.
- Is there livestock available to graze cover crops or leys? Grazing unlocks the biological benefit of a ley and makes cover crops economically productive rather than a cost.
- What is the primary driver of the rotation change — disease pressure, soil structure, reducing inputs, or soil carbon building? Different drivers suggest different rotation priorities.

A rotation plan without knowledge of current history will miss established disease cycles — confirm the current rotation before designing the next one.

**Output:**
```
ROTATION PLAN

Current rotation history: [crops in preceding 3–5 years]
Area: [ha or acres]
Livestock available: [yes — species / no]
Primary goal: [disease break / nitrogen / biology / input reduction]

PROPOSED ROTATION
Year 1: [crop]
Year 2: [crop]
Year 3: [crop — break crop if applicable]
Year 4: [crop / ley if applicable]

COVER CROP WINDOWS
Post-[crop]: [cover species] — [duration] — [benefit]
Post-[crop]: [cover species] — [duration] — [benefit]

UNDERSOW IN GRAIN CROPS
[grain crop]: Undersow with [species] at [rate] at tillering

BREAK CROP DETAIL
Species: [break crop]
Nitrogen credit to following crop: [kg N/ha equivalent]
Disease cycle broken: [pathogen]

BIOLOGY MONITORING
Earthworm count baseline: [date / location in field]
Slake test baseline: [date]
Retest: [12 months]

TRANSITION NOTE
[One sentence: where this rotation sits on the conventional-to-regenerative spectrum and what the next step would be]
```

**Next steps:**
- `/s4ag-soil` — the rotation plan drives a fertility plan; the soil test reveals what the rotation needs to address.
- `/s4ag-composting` — if straw is being removed and no ley is in the rotation, compost additions fill the carbon gap.
- `/s4ag-regenerative` — if the goal is a full transition to a grain system that builds biology rather than depleting it, the rotation is one component of the wider transition plan.