Soil test crop response correlation studies for targeting yield of tomato on Entisol
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Tomato, STCR-IPNS, fertilizer adjustment equation, Entisol.Issue
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Soil test crop response correlation studies were conducted to formulate the yield target equation for tomato var. Dhanashree under integrated plant nutrition system on Entisol. Fertilizer adjustment equations under IPNS were formulated for tomato by following Ramamoorthy’s inductive-cum-targeted yield model. The nutrient requirement for producing one tonne of tomato was 2.40, 0.70 and 3.10 kg of N,P2O5 and K2O, respectively. The per cent contribution from soil and fertilizer nutrients were found to be 21.0 and 45.52 for nitrogen, 75.25 and 18.25 for phosphorus and 15.12 and 60.03 for potassium, respectively. Similarly, the per cent contribution of fertilizers in presence of FYM was 58.12 for nitrogen, 28.22 for phosphorus and 90.12 for potassium. The per cent nutrient contribution of FYM was 12.25 for nitrogen, 6.13 for phosphorus and 15.22 for potassium. The initial soil bacterial, fungal and actinomycetes population ranged from 55-66 x 106 g-1, 3-12 × 104 g-1 and 19-48 × 105 g-1 with a mean of 60.5 × 106 g-1, 7.5 × 104 g-1 and 33.5 × 105 g-1 respectively with the 40 tha-1 FYM treatment block. In the same block at harvest soil bacterial, fungal and actinomycetes population increased and ranged from 89-142 × 106 g-1, 8-21 × 104 g-1 and 32-95 × 105 g-1 with a mean of 115.5 × 106 g-1, 14.5 × 104 g-1 and 63.5 × 105 g-1, respectively.Abstract
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