Development of soil test crop response based fertilizer prescriptions through integrated plant nutrition system for aggregatum onion (Allium cepa L.) under drip fertigation

An insight into the balanced crop nutrition and efficient irrigation will be rewarding to attain profitable bulb yield of shallow-rooted high nutrient requiring aggregatum onion. To develop fertilizer prescription equations(FPEs) for onion under drip fertigation by encompassing Soil Test Crop Response approach (STCR), a field experiment was conducted in Palaviduthi soil series with 15 treatments viz., Absolute control (T1), Blanket recommendation (60:60:30) + Farm Yard Manure (FYM) @ 12.5 t ha-1(T2), STCR based NPK (STCR-NPK) targeted 14 (T3),15 (T4),16 ha-1 (T5), FYM 6.25 (T6), (T7), STCR–NPK+FYM (T8),15 (T9),16 (T10), Biocompost 2.5 (T11), 5 (T12) STCR–NPK+Biocompost (T13),15 (T14),16 (T15). The results revealed that T10 more supercilious than others. basic parameters were deliberated from experimental data on total uptake, initial fertility status, applied doses. (variety CO 4) required 0.43, 0.32, 0.45 Kg N, P2O5, K2O produce one quintal yield. percent contribution nutrients 14.01, 54.57 35.11,50.50 P2O5 12.69, 70.12 K2O, respectively. biocompost 41.02, 16.23, 41.53 47.98, 15.87, 49.56 sequentially. Based above parameters, equations formulated series.