CUMULATIVE, DIRECT AND RESIDUAL EFFECT OF PHOSPHORUS POTASSIUM AND FARM- YARD MANURE ON PHYSICO-CHEMICAL CHARACTERISTICS OF THE SOIL AND YIELD AND QUALITY OFCROPS IN A FIXED CROP ROTATION IN A LONG TERM EXPERIMENT
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Date
1971
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PUNJAB AGRICULTURAL UNIVERSITY; LUDHIANA
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31052017_0002_0003_001505.pdf