The effects of soil management system and winter crop rotation on wheat yield and root diseases were assessed. Four soil management systems: (1) no-tillage, minimum tillage, conventional tillage using a disc plough plus disc harrow, and conventional tillage using a mouldboard plough plus disc harrow; and 3 crop rotation systems: wheat/soyabean, wheat/soyabean and common vetch [ Vicia sativa]/maize or sorghum ( Sorghum bicolor), and wheat/soyabean, white oat/soyabean and common vetch/maize or sorghum, were compared. The yield and plant height of wheat grown under no-tillage and minimum tillage were higher than the yield of wheat grown under conventional soil tillage using either disk plough or mouldboard plough. Weight of 1000 kernels was highest in the no-tillage. Crop rotation was efficient in reducing root diseases and in increasing wheat yield. The lowest wheat yield, grain weight per plant, 1000-kernel weight and test weight were obtained in monoculture (wheat/soyabean).
