- Documents and dissemination

- WP 2.1. Soil tillage management

- WP 2.2. and 2.3. Organic fertilization and green manure

- WP 2.4. Intercropping with legumes

The effects of farmyard manures and/or green manure on winter wheat performance and quality are assessed under five long-term field experiment programmes in France, Switzerland, Austria and Denmark. 

Various factors are assessed in these programmes in relation with nitrogen management. Thus, in the three sites of CROPSYST (Denmark), the influence of legume green manure in crop rotation is investigated. The impact of edaphic conditions is also taken into account. Interactions between types of green manure and time of incorporation are investigated on a sandy loam at Askov in Denmark. In a field experiment initiated in 1981, three green manure treatments after spring barley were included in 2003: ryegrass, grass-clover and none. DOK and Frick trials in Switzerland study the influence of farmyard manure (amount and types) and biodynamic preparations on wheat performances and quality and the system functioning. Finally, effects of different organic manure systems (green manure, communal green forage compost, farmyard manure) within a crop rotation system on soil properties and crop performances and quality are assessed in the MUBIL experiment in Austria. The study of the influence of the removal of green manure for fodder use and its replacement with farmyard manure, simulating a livestock system in addition to stockless systems is what is particularly being carried out in this long-term trial established in 2003.