Die Bodenkultur - Journal for Land Management, Food and Environment
W. Sinebo and R. Gretzmacher:
Variety, fertilisers, weed control and clover mixture effects on bread wheat in Ethiopia
The actions and interactions of varieties, N, P, clover and weed control on bread wheat were studied in a 25 factorial in randomised complete block design experiment with two replications on Nitosols of Holetta, Central Ethiopia in 1993 and 1994 seasons. A change in variety, N or P application and weed control increased wheat grain yield by 23, 17, 42 and 20 %, respectively. N and P together increased grain yield by 63 %, while variety +N +P doubled the yield. The combined effect of N, P and weed control increased grain yield by 129 %. Clover dry matter yield was reduced by N but doubled by weed control. Each season, the wheat crop grew vigorously resulting in a very low clover yield.
Key words: Ethiopia, wheat, nitrogen, phosphorous, weed control.