Effect of crop species and management practices on perennial weeds in organic farming

摘要

In order to study the biology and non-chemical control of perennial weeds, a three-year field experiment was established in 2001 at Vihti, southern Finland. The experiment was placed in a clay soil field under organic production, infested moderately with Cirsium arvense, Elymus repens and Stachys palustris, and heavily with Sonchus arvensis.