SUDHIR, KSHIVAMURTI NAIK R, R2016-11-152016-11-1513-12-12Th-10436http://krishikosh.egranth.ac.in/handle/1/85626Chemical analyses of one hundred surface soil samples (0-30 cm) were carried out to know the micronutrients status of soils of Chamarajanagar district and a field experiment was conducted to know the effect of levels and methods of application of zinc and boron on yield and quality of cotton in a micronutrient deficient soil. The study revealed the available N, P2O5 and K2O of soil ranged from 65.85 to 355.62, 7.39 to 57.48 and 218.41 to 447.84 kg ha-1 respectively. DTPA-extractable Fe, Zn, Mn and Cu ranged from 4.96 to 7.50 mg kg- 1, 0.06 to 0.81 mg kg-1, 0.66 to 5.65 mg kg-1, and 0.20 to 0.39 mg kg-1 respectively. The results of the field experiment laid out in a split plot design indicated significant response by the crop to the application of both the micronutrients. Among the different treatments, foliar spray of 200 g B ha-1 produced the highest number of bolls per plant (22.27), good opened bolls (20.13), boll weight (4.20 g) and seed cotton yield (26.69 q ha-1). Effect of foliar application of Zn and B either alone or in combination along with FYM at peak flowering and boll development stages in all levels produced significant response to cotton production than no FYM. However the quality parameters were not significantly influenced by either the method or levels of micronutrient application. Foliar application of 200 g B ha-1 resulted in the highest uptake of N, P2O5, K2O, Fe, Mn, Cu and B.enboron, zinc, farmyard manure, cotton, harvesting, planting, yields, biological development, land resources, application methodsThesis