Long term effect of chemical fertilizers and amendments on yield and uptake of wheat in an acid Alfisol

Abstract

The present investigation was carried out in the ongoing long term fertilizer experiment at Department of soil science, CSKHPKV Palampur. The influence of thirty six years of cropping with different chemical fertilizers and amendments on the contents on the yield and uptake of macronutrients i.e. nitrogen, phosphorus and potassium was investigated in an Acid Alfisol. Continuous combined use of chemical fertilizers and FYM and manual weeding in 100% NPK treated plots resulted in significant increase in the yield of wheat compared to rest of the treatments. The highest productivity was recorded where FYM and lime was added in combination. Continuous application of chemical fertilizers either alone or in combination with FYM or lime influenced significantly the uptake of nitrogen, phosphorus and potassium. The accumulation of macronutrients was found highest in those treatments where FYM and lime was added in combination.