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1773. Durst, L., G. Kahnt and E. Kubler. 1988. Effects of preceeding "break crops" on winter wheat and influence of cultural practices.. J. Agron. Crop. Sci., 160:239-249.
After the break crops wheat yield decreased within a range of 4 dt/ha as follows: alfalfa-beans-rape/clover-grass/maize. Raising N-fertilization hardly allowed to improve the value of break crops. The manner of primary tillage exerted stronger influence on the yield than the level of N-fertilization. Using the rotary tiller, at beginning of growth there may be calculated on 15% higher NO3-values and/or higher N-mineralization or N-transformation. Eyespot disease could not be prevented sufficiently and purposefully by another break crop, N-fertilization or primary tillage. Recurrent rotavating suppressed weeds less than ploughing.