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Effect of Long-Term Application of Fertilizers and Amendments on Wheat Productivity and DTPA Extractable Micronutrients in an Acid Alfisol
The effect of continuous application of fertilizers and amendments on wheat yield and DTPA extractable micronutrients in an acid Alfisol during rabi (2016-17) was evaluated in field experiment at the research farm of the Department of Soil Science, CSKHPKV Palampur. This experiment was initiated during 1972 in randomized block design with eleven treatments which were replicated three times. The soil of the experimental area was silt loam and classified taxonomically as "Typic Hapludalf". The highest productivity of wheat was recorded in the treatment comprising 100 per cent NPK + FYM and was statistically comparable with 100 per cent NPK + lime. Continuous application of N alone resulted in zero yield and omission of K and S from the fertilization schedule also resulted in drastic reduction in the yield. In surface soil (0-0.15m), application of Zn along with 100 per cent NPK (T5 ) recorded the highest value (3.75 mg kg-1) of DTPA extractable Zn and combined use of FYM with optimal dose of NPK (T8 ) recorded the highest value of DTPA extractable Fe, Cu and Mn (38.0, 2.25 and 37.25 mg kg-1, respectively). The lowest value (1.08, 18.8, 1.32 and 17.90 mg kg-1) of DTPA extractable Zn, Fe, Cu and Mn, respectively, was recorded in control plot.
Keywords
Wheat Yield, Micronutrients, Fertilizers, Amendments, Alfisol.
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