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Pakistan Journal of Biological Sciences
Year: 1999  |  Volume: 2  |  Issue: 2  |  Page No.: 462 - 465

Relationship Between Seed Sulphur and Phosphorus and Seed Yield of Brassica napus on two Alfisols Fertilized with Different Sulphur Sources

Rahmatullah, G. Nabi, M. Salim and M.S. Zia    

Abstract: Field experiments on two Alfisols at different locations were conducted to study the response of Westar and CON-I varieties of Brassica napus to S application (0 and 37 kg ha-1) as ammonium sulphate, gypsum and single superphosphate. Various S fertilizers, Brassica varieties and location of the experiment had a significant (p<0.05) main and interactive effect on the grain and oil yield of Brassica. Different S-amendments in increasing grain yield of Brassica followed the order: ammonium sulphate > gypsum > single superphosphate. Westar was a better grain-yielding and a more S-responsive variety of Brassica than CON-I. Both grain and oil yield of Brassica were higher on a site (Fateh Jang) containing low CaCO3 and high plant-available P. Sulphur concentration in seed was found in strong antagonism with seed P (r= -0.79, n= 16).

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