Effect of tillage and tank-mix herbicide application on weed management in soybean (Glycine max) Younesabadi Masoumeh1,*, Das T.K.2, Sharma A.R.3 Indian Agricultural Research Institute, New Delhi-110 012 1Scientist (Weed Science & Agronomy), Department of Plant Protection, Agricultural & Natural Resources Research Center of Golestan Province, Iran 2Principal Scientist, Division of Agronomy 3Director, Directorate of Weed Science Research, Jabalpur, M.P. *Corresponding author Email: myounesabadi@yahoo.com
Online published on 25 September, 2013. Abstract A field experiment was carried out at the Indian Agricultural Research Institute during 2010 and 2011 to investigate the effect of tillage and tank-mix herbicide application on growth, yield, nutrient uptake and protein content of soybean [Glycine max (L.) Merrill]. It was observed that conventional (CT) and no (NT) tillage systems resulted in comparable weed density and dry weight and soybean seed yield during both years except 2010, when NT resulted in significantly lower weed density. Tank-mix pre-emergence application of pendimethalin 0.5 kg/ha + imazethapyr 0.075 kg/ha was next to weed-free check and superior to all other weed control treatments on the reduction of weed density in both years, but, with respect to reduction in weed dry weight, it was comparable with pendimethalin 0.5 kg/ha + hand weeding, which resulted in the lowest weed dry weight after weed-free check. Nitrogen, P and K uptake by soybean seed was comparably higher in weed-free check and tank-mix pre-emergence application of pendimethalin 0.5 kg/ha + imazethapyr 0.075 kg/ha in both years. Conversely, N, P and K uptake by weed was significantly higher in weedy check, and the lowest amount of these nutrients after weed-free check was observed in pendimethalin 0.5 kg/ha + imazethapyr 0.075 kg/ha. All weed control measures resulted in significantly higher soybean seed yield compared to weedy check, but the tank-mix pre-emergence application of pendimethalin 0.5 kg/ha + imazethapyr 0.075 kg/ha resulted in considerably higher seed yield over others in both years. Top Keywords Nutrients, Soybean, Tank-mix herbicide, Tillage, Weed, Yield. Top |