Soil Application of Sea Weed Extract Granules and Foliar Application of Nano ZnO to Bt Hybrid Cotton to Vertic inceptisols

Bt hybrid cotton was significantly benefitted by the soil application of Sagarika sea weed extract granules at 25 kg ha-1 yr-1 along with recommended basal fertilizers dose or foliar nano ZnO 4% 0.04% squaring and flowering stages. These treatments enriched index leaf residual P Zn content beyond 20 μg g-1 fresh weight during boll development stage this resulted in significant improvement lint yield 7.5% i.e. 35 yr-1, C:B ratio 5.0% net returns to tune ₹. 5000 over alone 100% RDF eroded Vertic inceptisols deficient N, Mg, S, B. Excess rains seedling vegetative followed drought reproductive stages both years, reduced economic viability seed treatment bio-stimulants applications besides Zn, B together cotton.