Comparison and Correlation of Extractable K for Wheat Fertilization in Soils of Potohar Plateau of Pakistan
Comparison and Correlation of Extractable K for Wheat Fertilization in Soils of Potohar Plateau of Pakistan
Muhammad Zameer Khan1, Sair Sarwar1*, Ahmad Khan1, Razaullah Khan1, Munazza Yousra1 and Muhammad Ilyas2
ABSTRACT
Laboratory and greenhouse experiments were undertaken to study the response of applied K in prominent soil series of Potohar Plateau of Pakistan and to correlate soil extractable K with yield components, N, P, K concentration and uptake by wheat. Two extractants namely, AB-DTPAand NH4OAc were tested for K extraction from soils. The results showed a high positive correlation between AB-DTPA and NH4OAc extractable K, plant growth and yield parameters. The amounts of soil K had positive correlation with shoot K concentration and grain yield of wheat with r = 0.48 and 0.49, respectively for AB DTPA as compared to that of 0.40 and 0.42 for NH4OAc K. On the basis of the study it was concluded that AB-DTPA soil test method can safely be used for evaluation of K status of soils derived from diverse parent material.
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December 2019
Vol. 35, Iss. 4, Pages 1020-1356
