The Haughley Experiment was the first scientific comparative study of organic farming and conventional chemical-based farming, started in 1939 by Lady Eve Balfour and Alice Debenham, on two adjoining farms in Haughley Green, Suffolk, England.
In the early 1980s, properties of the three sections were measured and showed differences in earthworm density, crop root depth, and soil properties including soil carbon, moisture and, surprisingly, temperature.
- "The Haughley Experiment". Nature 179 (4558): 514. 1957.
- Towards a Sustainable Agriculture - The Living Soil – text of address by Eve Balfour to the 1977 IFOAM conference in Switzerland.