THE PERFORMANCE OF SOYBEAN (c.v. Americana) ESTABLISHED BY ZERO TILLAGE TECHNIQUE IN IMPERATA FIELD CONTROLLED BY HERBICIDES
AbstractAÂ fieldÂ experimentÂ wasÂ conductedÂ toÂ investigateÂ the performanceÂ ofÂ soybeanÂ (c.v.Â Americana)Â when established with zero tillage technique on Imperata dominated area. Four different techniques of alang-alang controlÂ i.e.Â imazapyrÂ (20Â kgÂ ai/ha),Â glyphosateÂ (25Â kgÂ ai/ha),Â glufosinateÂ (3.0Â kgÂ ai/ha)Â andÂ manual cultivation were arranged factorially with time of plantings i.e. 1,2 and 3 months after treatments. TheÂ alang-alangÂ damagesÂ variedÂ withÂ herbicidesÂ andÂ times,Â imazapyrÂ (20Â kgÂ ai/ha) showed slow appearance of damage at 3 months after application it was only 69%, while that of glufosinate was already down to 48% due to regrowth. No phytotoxicity was recorded, but the yield was low.
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