VENKAPPA, P.HARSHITHA, G. H.2023-01-142023-01-142022-12-29https://krishikosh.egranth.ac.in/handle/1/5810192279ThesisA field experiment entitled studies on sensor based irrigation and nano fertilizers on seed yield and quality of rice bean (Vigna umbellata Thunb.) was conducted during kharif-2021 at L block, ZARS, GKVK, Bengaluru allocating three irrigation management techniques in main plots (I1-Drip irrigation as per UASB PoP, I2- Yellow SMI based drip irrigation, I3-Sensor based drip irrigation at 25% DASM) and fournutrient management strategies in sub plots (F1 Absolute control, F2-20:40:30 NPK kg /ha, F3-Foliar spray of nano urea @ 2ml/l at 30 and 45 DAS, F4-Foliar spray of nano DAP @ 2ml/l at 30 and 45 DAS) replicated thrice in split plot design. The results showed that, sensor based drip irrigation at 25% DASM and foliar application of nano DAP at 30 and 45 DAS recorded significantly higher plant height (65.06 cm), number of branches plant-1 (8.73), number of pods plant-1(49.33), number of seeds pod-1 (9.27), 100 seed weight (5.92 g) and seed yield hectare-1(23.99 q) at harvest. In seed quality studies also, sensor based drip irrigation at 25% DASM and foliar application of nano DAP at 30 and 45 DAS produced highest germination (82.0 %), mean seedling length (51.9 cm), mean seedling dry weight (26.6 mg), SVI-І (3993), SVI-Ⅱ (2189) and protein content (26.5 %). Among nutrient management, foliar spray of nano DAP at 30 and 45 DAS recorded higher net returns (Rs. 83449 ha-1) and B: C ratio (2.57) when compared to other treatments.EnglishThesis