ALUR, ASHOK S.HIREMATH, VISHALUM., SHIVANNAS., ANIL KUMARB. N., DHANANJAYAS. J., PRASHANTHR., MANJUNATH2021-11-102021-11-102019-08UHS17PGM980https://krishikosh.egranth.ac.in/handle/1/5810177970The investigation entitled “Effect of potassium humate and bio-inoculants on soil fertility, nutrient use efficiency, yield and quality of French bean (Phaseolus vulgaris L.)” was conducted during 2018-19 at Regional Horticulture Research and Extension Centre (RHREC), Bengaluru. The experiment was laid out in RCBD with 13 treatments replicated thrice.. Potassium humate was applied as foliar spray (0.5%, 1 and 1.5%) and soil application (20 kg ha-1).The results revealed that combined application of RDF + foliar spray of 1% potassium humate @ 30DAS + seed treatment with KSB has recorded highest plant height (289.10 cm), number of pods per cluster (11.33), number of pods per plant (137.51), pod length (18.45 cm), pod girth (8.29 mm), vegetable pod yield per plant (1.03 kg), vegetable pod yield per hectare (28.48 t ha-1) and biological yield (9.69 t ha-1). Highest crude protein content in seed (22.87 %) was recorded with the application of RDF + seed treatment with Rhizobium + foliar spray of 1.5% potassium humate. Application of RDF + potassium humate @ 20 kg ha-1along with bio-inoculants has significantly increased the soil pH (7.35), organic carbon content (0.83%), available nitrogen (339.31 kg ha-1), available potassium (224.15 kg ha-1), Rhizobium (6.54 CFU x 104 g-1 of soil) and KSB population (44.16 CFU x 103 g-1 of soil) in soil after harvest of crop. Total N (104.86 kg ha-1), total P (17.09 kg ha-1) and total K (92.70 kg ha-1) uptake in plant was recorded with the application of RDF + foliar spray of 1% potassium humate along with bio-inoculants.EnglishThesis