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Written Paper

Soil preparation on the efficiency of herbicides on weed control in sugarcane  [2011]

Sarawut Rungmekarat(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) Rungsit Suwanmonkha(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) Jutamas Romkaew(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture at Kamphaeng Saen. Department of Agronomy) Pruchya Akkathin(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) et al.

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Experiment was conducted to study the effect of soil preparation methods and the efficiency of herbicides in weed control and yield of sugarcane. Experimental design was a split plot in RCB with 3 replications. The main plot was land preparation: primary tillage 1 time, primary tillage 1 time and secondary 1 time and primary tillage 1 time and secondary 2 times. Sub plot was using pre-emergence herbicide: no application, atrazine with paraquat at the rate of 80+400 grams active ingredient per rai and pendimethalin + imazapic wigh paraquat at the rate of 12+80+133 grams active ingredient per rai. The results showed that the primary tillage 1 time and secondary 2 time had higher efficiency on weed control of pendimethalin + imazapic up to 60 days after planting sugarcane, higher in no.of millable cane/rai and yield but atrazine good weed control level. Primary tillage 1 time and secondary 1 time had good weed control of atrazine and pendimethalin + imazapic and no.of millable cane/rai and yield less than primary tillage 1 time and secondary 2 times. And a rough soil preparation primary tillage 1 time had moderate in weeds control when pendimethalin + imazapic applied.