National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
To develop fertilizer prescription equations for vegetable cowpea, a field experiment was conducted on Ultisol of STCR field, Kerala Agricultural University, Thrissur by using integrated plant nutrient management system on the basis of STCR approach. Soil test data, cowpea pod yield and NPK uptake by cowpea were used for obtaining four important basic parameters viz. nutrients required to produce one tonne of pod yield (NR), contribution of nutrients from fertilizers (%CF), contribution of nutrients from soil (%CS) and contribution of nutrients from organic matter (%CFYM). The nutrient requirement of cowpea to produce one tonne of pod yield in terms of N, P2O5 and K2O were 10.82, 0.52 and8.00 kg t-1, respectively. The per cent contribution of nutrients from soil, fertilizer and FYM were 12.85. 14.28 and0.65 for N; 10.53, 0.71 and 0.55 for P2O5; and 6.26, 2.58 and 0.84 for K2O, respectively. By using these basic parameters, ready reckoner of fertilizer doses was prepared for varying soil test values and desired yield targets of vegetable cowpea for NPK alone and NPK with FYM.
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