Response of Yield and Yield Components of Field Pea to Tillage Frequency, Phosphorus Fertilization and Weed Control on Nitisols of Central Ethiopian Highlands
June 1, 2009
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treatments. Plowing twice, three and four times including the last pass for seed covering resulted in mean seed yield advantages of 38, 55 and 43%, respectively, compared to the control. Application of phosphorus fertilizer at the rates of 10, 20 and 30 kg P ha-1 increased mean seed yields by 30, 53 and 50%, respectively, compared to the control. Weeding once by hand increased mean seed yield by 16% compared to the unweeded check. Tillage frequency by P fertilizer and weed control interaction significantly affected seed yield. The highest mean seed yield of two years for the tillage, P fertilizer and weed control interaction was obtained from three plowings, 20 kg P ha-1 and weeding once by hand. The yield increment was higher by 232% compared to the control, namely planting with the first pass of ox-drawn implement, with no P application and unweeded condition. Seed yield was highly significantly and positively correlated with total biomass (r = 0.93**), pods per plant (r = 0.54**), plant height (r
= 0.54**), seeds per pod (r = 0.41**) and thousand seeds weight (r = 0.37**). The results of economic analysis indicated that the treatment with three times tillage, application of 20 kg P ha-1 and weeding once by hand is the best option with a marginal rate of return of 423%, which is economically the most feasible alternative.
Agegnehu, G., and H. Beyene. “Response of Yield and Yield Components of Field Pea to Tillage Frequency, Phosphorus Fertilization and Weed Control on Nitisols of Central Ethiopian Highlands”. East African Journal of Sciences, vol. 3, no. 2, June 2009, pp. 161-9, doi:10.20372/eajs.v3i2.84.
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