2,600-acre organic farm on chalk geology in Wiltshire, demonstrating measurable biodiversity and soil biology advantages of organic management over conventional. Written by Wilfred Mole in Direct Driller Issue 5.
Profile
| Location | Wiltshire, England |
| Area | 2,600 acres |
| Geology | Chalk |
| Organic since | ~1990s (30+ years); current ownership since 2006 |
| Crops | Organic malting barley, porridge oats |
| Market | Organic premium; prices rising year-on-year; largely indifferent to global commodity price fluctuations |
Soil Biology Comparison — Organic vs Conventional
In 2018, populations of ground-dwelling invertebrates were compared between organic fields (Lower Pertwood) and adjacent conventionally farmed land (recently purchased):
| Measure | Organic field | Conventional field |
|---|---|---|
| Ground beetles | 3.5× more | Baseline |
| Spiders | 2× more | Baseline |
| Total specimens (April–July) | ~4,000 | — |
Ground beetles are key indicators of environmental change — populations react rapidly to alterations in climate, cultivation, pesticide usage, and cropping. Their numbers reflect soil biological activity through the food chain (beetles → invertebrate prey → fungi/algae → soil moisture).
[Source: dd-issue-05, 2026-04-11]
Historical Context
- Farm shows ancient Celtic field systems (Bronze Age, ~4,000 years ago)
- Traditional systems: “pare and bake” on thin chalk soils → crop until exhausted → revert to grassland → livestock → restore fertility → crop again
- Field names preserve this history: “Bake 1”, “Bake 2”, “Sainfoin”, “Starveall”, names with “Down” suffix
- Post-war intensification: “cataclysmic landscape-scale change” with loss of high-quality downland across chalk England
Philosophy
“We have patently failed to observe, or have refused to see, the red warning flag that has been waving at us for decades.”
“Articles and statistics about declines in farmland birds, adverse effects of pesticides or losses of soil have been treated as the concern of academics or pressure groups. This information has now coalesced to form a gigantic red flag.”
[Source: dd-issue-05, 2026-04-11]
Related Pages
- Soil Health Monitoring — In-Field Tests and Tools — Soil biology assessment methods
- Earthworms Under No-Till — Invertebrate indicators of soil health
- Conservation Agriculture — Core Principles — Environmental benefits of CA
- Sainfoin — Deep-Rooting Forage Legume — Historical Cotswold crop; field names at Pertwood