Effects of crop rotation, tillage method and N application on wheat yield at Hanang wheat farms, Tanzania
2000
Antapa, P.L. (HWC- CMSC, Katesh (Tanzania)) | Mariki, W.L. (Selian Agricultural Research Institute, Arusha (Tanzania))
Crop management options which optimize tillage, residue management and herbicide practices are likely to provide more sustainable and efficient farming systems, especially in relatively marginal environments like those prevailing at the Hanang Wheat (HWC) farms. A crop rotation trial was established at the HWC from 1994/95-1999/2000 to determine whether wheat yields at the HWC farms could be improved through crop rotation with soybean and pigeon pearotations were compared in factorial combination with tillage practice and N application. Across four years of experimentation, rotations of wheat with soybean or wheat with pigeon pea, both under minimum tillage, resulted in the highest wheat yields, 2.82 and 2.80 t/ha, respectively. Soybean-wheat or pigeon pea-wheat rotations are recommended for improved and sustainable wheat yields at the HWC farms. However, further research is needed to determine optimal rotation frequencies. Use of N fertilizer alone is not recommended to increase wheat production at the HWC farms. However, N application of 30 kg/ha is recommended in conjunction with minimum tillage to increase wheat production at the HWC farms.
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