The effects of seed rates viz, 40, 60 and 80 kg/ha and chemical weed control with Stam-F.34 on the yield components of four rice varieties (Kanchi, Kannaki, Karuna and Cauveri) were studied. The panicle weight, 1000-grain weight and number of grains per panicle decreased with increasing seed rate while the number of empty spikelets increased with increasing seed rate. Chemical weed control in combination with lower seed rate resulted in better expression of yield comp:nents, The optimum seed rate was 40 kg/ha under chemical weed control and 60 kg under manual weeding.
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Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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