Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110012
*Present addiess: Central Soil Salinity Research Station, Canning Town, West Bengal, 743329
The influence of soil cationic environment in respect of potassium, calcium and magnesium on the response of wheat (cv.Sonalika) to NPK fertilizer was studied in alluvial, black and laterite soils under greenhouse conditions. There was a positive response to K and Mg in alluvial soil but a negative one in black soil. Higher levels of application of Ca and Mg depressed the yield but the decrease was more at the lower doses of N+P. The results brought out clearly the importance of the relative proportions of K+, Ca2+ and Mg2+ for optimum crop yield.
NPK fertilizer response, soil cationic environment, different soils, wheat yield
