Relative Change in Yields and Nutrient Uptake of Black Gram under Different Doses and Sources of Boron

The present study “Relative changes in Boron fractions in black gram rhizosphere” was contemplated with two objectives: 1) To find out the suitable source, dose and method of boron for black gram and 2) To study the changes in relative boron fractionation under black gram rhizosphere. To achieve the present objectives a field experiment was conducted with Greek gram var. IPU2-43 in factorial randomized block design with three sources, four doses and two methods of application of boron replicated thrice at Bihar Agricultural College Farm of BAU, Sabour during the year 2018-19. Three sources were: S1: Borax, S2: Solubor and S3: Boric acid; Doses: D1: 0.5 kg ha-1, D2: 1.0 kg ha-1, D3: 1.5 kg ha-1, D4: 2.0 kg ha-1and methods: Soil and foliar application. Based on the findings of field experiment it can be concluded that the application of 1.5 kg B ha-1 (D3) registered maximum seed yield of (8.27 q ha-1), straw yield of (10.04 q ha-1), nutrient uptake by grain (12.64 g ha-1) and nutrient uptake by straw (16.95 g ha-1) which was statistically at par with the application of 2.0 kg B ha-1 (D4) and was found to be statistically superior over rest of the doses. Among the sources, the maximum seed yield (7.96 q ha-1), straw yield (9.53 qha-1), nutrient uptake by grain (12.42 gha-1) and nutrient uptake by straw (16.36 gha-1)was found to be highest under the plots receiving 1.5 kg B ha-1 through foliar application of Solubor (S2) and the lowest grain yield (7.88 qha-1), straw yield (9.36 q ha-1),nutrient uptake by grain (11.85 gha-1) and nutrient uptake by straw (15.60 gha-1)was recorded from 0.5 kg B ha-1(D1) which was found statistical inferior over rest of the boron doses. Foliar application resulted in a better yield of straw as compared to soil application.