Soil Fertility and Biodiversity in Organic Farming

P. Mäder^1*, A. Fliebach¹, D. Dubois², L. Gunst², P. Fried² and U. Niggli¹

Abstract
An understanding of agroecosystems is key to determining effective farming systems. Here we report results from a 21-year study of agronomic and ecological performance of biodynamic, bioorganic, and conventional farming systems in Central Europe. We found crop yields to be 20% lower in the organic systems, although input of fertilizer and energy was reduced by 34 to 53% and pesticide input by 97%. Enhanced soil fertility and higher biodiversity found in organic plots may render these systems less dependent on external inputs.


Source
Science (2002) 296: 1694-1697


Author Locations & Affiliations
(1) Research Institute of Organic Agriculture, Ackerstrasse, CH-5070 Frick, Switzerland.
(2) Swiss Federal Research Station for Agroecology and Agriculture, Reckenholzstrasse 191, CH-8046 Zürich, Switzerland.
* Corresponding author, E-mail: paul.maeder@fibl.ch


Posted March 2010