TY  - CONF
ID  - orgprints7680
UR  - http://orgprints.org/7680/
A1  - Rasmussen, Ilse A.
A1  - Askegaard, Margrethe
A1  - Olesen, Jørgen E.
TI  - Organic crop rotation experiments - short-term versus longer-term results
Y1  - 2006///
N2  - Danish experiments with cereal-based organic crop rotations have shown that the short-term results (the first course, up to four years after conversion) are different from those obtained in the longer-term (the second course, fifth to eighth year after conversion). Yield gain from use of manure increased from the first to the second course on a sandy soil, but decreased on loamier soils. Yield gain from leguminous catch crops increased from the first to the second course in a crop rotation without grass-clover. Some of these effects were caused by buffering effects of the grass-clover, other effects were caused by changes in soil fertility over time.
AV  - public
ER  -