The percentage contribution of various B fractions towards total B content followed the order: readily soluble B (0.43 to 0.55%) < specifically adsorbed B (0.74 to 0.98%) < organically bound B (0.70 to 1.55%) < ox-ide bound B (1.26 to 3.11%) < residual boron B (93 to 96.8%). The content of different fractions improved with the increase in rates of B application. The application of B with different rates and frequencies significantly enhanced B fractions in soil. ![]() Optimal available B content in soil was 1.25 mg kg −1 for both groundnut pod and cabbage-head yield. Boron appli-cation enhanced B content in groundnut pod, haulm, cabbage and available B in soil. The addition of 1.0 kg B ha −1 in alternate years was found op-timum for enhancing the yield of groundnut and cabbage crops grown on study soil. The application of B at different rates and frequencies significantly increased groundnut and cabbage yield in comparison to yield attained under the control. The treatments of the experiment encompassed various combinations of three frequencies and four rates of B application including one control (no B application). The direct effect of B addition on groundnut yield and the residual effect on succeeding cabbage crop yield was eval-uated. capitata) cropping system in different rates and frequencies on yield of crops and soil-B dynamics. A field experiment of a 6-year duration was carried out at Anand Agricultural University, Gujarat, India to study the influence of long-term B fertilization in the groundnut ( Arachis hypogaea L.)-cabbage ( Brassica oleracea var. Therefore, it is imperative to have knowledge about the impact of long-term B addition at various dosages on crop yield and soil-B dynamics. The addition of boron (B) fertilizers to soils with low B content is required for augmenting crop yield.
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