Results from the DOK-Trial: 
Organic farming enhances soil fertility and biodiversity

The DOK-long term trial - unique in its conception - compares the consequences of bio-organic, bio-dynamic and conventional farming systems. The DOK-field trial was started in 1978 at Therwil, Switzerland.

The DOK-field trial ist the oldest long-term trial comparing these farming systems world-wide. In 2002 the results of the DOK trial were published in the Science Magazine.

Here we present the most prominent results of the trial.

• Is organic farming practicable?
• The field trial design
• The crop rotation
• Do organic systems produce sufficient yield?
• Are nutrient input and output in organic farming balanced?
• Is organic farming energetically sound?
• Is organic farming healthy for the soil?
• Does organic farming mine our soils?
• Does organic farming improve soil structure?
• Is organic farming beneficial to soils?
• Carbon Fluxes in the Soil Ecosystem
• Whats species diversity got to do with it?
• Literature
• Imprint