Vol. 12, Issue 8 (2023)

The present experiment was undertaken to evaluate the effect of fertigation on growth and yield of Bt. cotton during 2019–20 at the Soil and Water Management Research Farm, Navsari. The experiment was laid out in a randomized block design with four replications and ten treatments. The results revealed that application of 100% NPK through fertigation (T₁) recorded significantly higher leaf area index, chlorophyll content (SPAD reading) and CGR, but it remained at par with 100% N & K through fertigation with 100% P applied as basal (T₂), 100% N through fertigation with 100% P & K applied as basal (T₃), 80% NPK through fertigation (T₄), 80% N & K through fertigation with 80% P applied as basal (T₅) and 80% N through fertigation with 80% P & K applied as basal (T₆). Lower leaf area index, chlorophyll content (SPAD reading) and CGR were recorded under 60% N fertigation with 60% P and K applied as basal (T₉). Net assimilation rate did not remarkably vary under different levels of fertigation.