Translations:Manfred Klett: Von der Agrartechnologie zur Landbaukunst/897/en

nematode species that cause damage in the following crops. Oilseed rape requires early-vacating preceding crops such as winter barley and winter rye. It leaves behind for the following crop a superbly structured, well-conditioned, relatively weed-free soil. For the reasons given, as with the cabbage species, a break of three to four years in cropping is called for. Where intensive crucifer green manuring is incorporated into the crop rotation, the intervals must be extended still further.