An investigation was carried out during kharif, 2018 in rice crop by application of Nutri Boost an amino powered yield booster at different stages of crop growth to mode of action and appropriate time of application in Telangana. The experiment was laid out in Randomized Block Design (RBD) with five treatments and control i.e. T1: control, T2: 2.5ml/l Nutri Boost through foliar spray @ 20 DAT, T3: 2.5ml/l Nutri Boost through foliar spray @ 45 DAT, T4: 2.5ml/l Nutri Boost through foliar spray @ 70 DAT, T5: 2.5ml/l Nutri Boost through foliar spray @ 20 and 45 DAT, T6: 2.5ml/l Nutri Boost through foliar spray @ 20 and 45 and 70 DAT. Experiment revealed that application of T6 (2.5 ml/l Nutri Boost @ 20, 45 and 70 DAT) and T5(2.5ml/l Nutri Boost through foliar spray @ 20 and 45 DAT) resulted in improved plant height, leaf area index, number of tillers per square meter, panicle length, spikelet fertility (%), test weight, harvest index, grain yield and straw yield compared to other treatments. There is no significance difference between T5 and T6 except for spikelet fertility (%), test weight, grain yield and harvest index.

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