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kalaiagri2003@yahoo.com
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Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore (Tamil Nadu)
Bt cotton, Fertilizer level, Plant geometry
Field experiments were conducted to study the effect of plant spacing and fertilizer levels on weed density and weed dry matter production in Bt cotton hybrids. MECH 162 and RCH 2 Bt hybrids had lower weed density and dry matter production than MECH 184 Bt hybrid. Closer plant spacing of 90x45 and 90x60 cm and fertilizer application of 120:60:60 and 160:80:80 kg NPK/ha reduced the weed density and weed dry weight than 120x60 cm of plant spacing and 200:100:100 kg NPK/ha of fertilizer application. MECH 162 and RCH 2 Bt cotton adopted with plant geometry of 90x60 cm and applied with fertilizer level of 160:80:80 kg NPK/ha recorded higher seed cotton yield.