Author(s):

Kiran SK, Prakash SS, Krishnamurthy R, Yogananda SB and Shivakumar KV

Abstract: The STCR equation developed on cowpea for Zone 5 has been tested for its performance and accessed for its efficiency in Zone 6. A field experiment was conducted at College of Agriculture, VC farm, Mandya with thirteen treatments including control, RDF+FYM, STCR (no FYM), STCR (no P), STCR (50% RDP) and STCR (50% RDP) with foliar application of HA (500, 1000 ppm) and MM (1 & 2) alone and their combinations at 30 and 45 DAS. Results revealed that yield target of 15 q ha-1 was achieved with application of STCR (50% RDP) based fertilizers. Significantly higher grain and haulm yield of 1550.61 and 3096.29 kg ha^-1, respectively was obtained in the treatment with STCR (50% RDP)+HA @ 500 ppm and MM2. Higher concentration of nitrogen (4.58%) and potassium (2.64%) in cowpea grain was recorded in T₁₂ and phosphorous content (0.47%) was highest in T₂ which received RDF + FYM compared to all the other treatments. The concentration and uptake of all the micronutrients (Fe, Cu, Mn, Zn and B) in grain and haulm were significantly higher in treatments having combination of humic acid and MM, followed by MM alone compared to all the other treatments.

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