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Pakistan Journal of Biological Sciences
Year: 2001  |  Volume: 4  |  Issue: 9  |  Page No.: 1087 - 1089

Effect of Tillage Practices and Seed Rates on Wheat

Mohammad Arif, Khair Mohammad Kakar, Riaz Ahmad and Shaukat Ali    

Abstract: The effect of tillage operations, one plough (minimum tillage), two plough (conventional tillage) and four plough (maximum tillage) and seed rates, 75, 100, 125, 150 and 175 kg ha–1 on wheat were studied. Statistical analysis of the data revealed that different tillage operations had significantly affected tillers/m2, thousand grain weight, number of grains/spike and grain yield. Maximum tillers/m2 (305), thousand grain weight (43.2 g), number of grains/spike (57) and grain yield (6266 kg ha–1) were obtained from plots ploughed four times. Maximum tillers/m2 (324), grains per spike (59), thousand grain weight (42.9) and grain yield (6266 kg ha–1) were recorded at seed rate of 100 kg ha–1. Interaction between tillage practices and seed rate had a significant effect on tillers/m2, thousand grain weight, number of grains/spike and grain yield of wheat. As interaction between tillage operations and seed rates was significant therefore separate regressions were fitted to the data and xmax was calculated from the equation Y = a+bx+cx2 for each parameter and treatment as -b/2c.

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