Author/Authors :
khan, muhammad zameer national agricultural research centre - land resources research institute, Islamabad, Pakistan , sarwar, sair national agricultural research centre - land resources research institute, Islamabad, Pakistan , khan, ahmad national agricultural research centre - land resources research institute, Islamabad, Pakistan , khan, razaullah national agricultural research centre - land resources research institute, Islamabad, Pakistan , yousra, munazza national agricultural research centre - land resources research institute, Islamabad, Pakistan , ilyas, muhammad university of poonch - university of poonch, Rawalakot, pakistan
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-DTPA and 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.
Keywords :
Exchangeable K , Wheat , Soils of potohar plateau , AB , DTPA and NH4OAc
