Soil
Fertility and Biodiversity in Organic Farming (Abstract), by
Paul Maeder et al, Science 31 May 2002:Vol. 296. no. 5573, pp. 1694
- 1697)
Long-term
Organic Agriculture Studies in Switzerland by Paul Maeder,
The Research Institute of Organic Agriculture (FiBL)
Legume-based
cropping systems have reduced carbon and nitrogen losses (Abstract),
by L. E. Drinkwater et al, Nature 396, 262-265 (19 November 1998) |