Beeresha, K.J.BEERESHA, K.J.2021-09-222021-09-222018-08-01Th-12017https://krishikosh.egranth.ac.in/handle/1/5810176054A field experiment entitled “studies on the effect of nano potassium on growth and yield of maize” was conducted during kharif 2017 at Zonal Agricultural Research Station, UAS, GKVK, Bengaluru in sandy loam soil (pH 6.56; OC 0.43 %) with medium available nitrogen (428.37 kg ha-1), phosphorus (45.56 kg ha-1), potassium (243.93 kg ha-1) and zinc (0.48 mg kg-1). Experiment was laid out in RCBD with 10 treatments replicated thrice and the cultivar used was BRMH-1. The results revealed that soil application of K2O at 15 kg ha-1 at sowing and foliar application of 2500 ppm Nano K2O (30 and 60 DAS, respectively) recorded significantly higher plant height (218.0 cm), number of leaves (10.8), leaf area (3636 cm2 plant-1), total dry matter (500.4 g plant-1), cob length (17.9 cm), cob girth (17.2 cm), number of rows cob-1 (16.8), number of kernels row-1 (41.3), number kernels cob-1 (694.8), weight of kernels cob-1 (188.4 g) and 100 kernels weight (34.80 g) ultimately resulted in higher kernel yield (9051 kg ha-1) and accounted 19.20 per cent higher kernel yield as compared to RDF as per package of practices. Also, recorded higher nutrient uptake (243.7 kg ha-1 N, 54.2 kg ha-1 P2O5, 246.2 kg ha-1 K2O). Soil application of K2O at 15 kg ha-1 at sowing and foliar application of 2500 ppm Nano K2O (30 and 60 DAS, respectively) recorded higher gross and net returns (138380 and 88240 Rs. ha-1, respectively).EnglishThesis