Experiments were conducted at different sites to evaluate the response of wheat to foliar application of N and K under rainfed conditions of potohar region of Punjab. These studies were conducted to compare the effect of K (KNO_3 and KC1) sources as foliar application at different growth stages of wheat. The treatments were (1) Control (No spray); (2) K 0.5 solution (as KNO_3); (3) N K 0.5 and 0.2 solution (as KC+ Urea); (4) K @ 0.5 solution (as KC1); (5) N @ 0.2 solution as Urea. Biologicalyield of wheat improved significantly with N and K application. The highest biological yield 10938 was obtained by foliar application of KC1 along with nitrogen. The response of foliar potash application on Chakwal-86 wheat variety was significant amongthe different treatments. This study proved that both sources of potash i.e. KNO_3 and KC1 are equally effective in increasing wheat yield and can be helpful in achieving maximum realizable yield. Nitrogen application improved the N and K content in the leaf tissues and uptake by plant which resulted in more production. Foliar application of potash at critical stages can be helpful in barani areas of Pakistan to realize optimum economic yield.
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