Straw management, weed control, nutrient uptake
A field experiment was conducted at experimental farm of the Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab) during rabi seasons of 2004-05 and 2005-06 to study the effect of rice residue management techniques and weed control treatments on the growth and development of Phalaris minor and wheat. The studies revealed that surface placement of rice residues at 6 and 7 t/ha significantly reduced the dry matter accumulation and nutrient uptake by P. minor as compared to incorporation and no rice residue treatments. Grain yield and nutrient uptake by wheat were statistically similar in all rice residue management techniques. Post-emergence application of clodinafop 60 g/ha, sulfosulfuron 25 g/ha and mesosulfuron + iodosulfuron 14.4 g/ha significantly reduced the dry matter accumulation and nutrient uptake by P. minor as compared to control (unweeded). Consequently, all the herbicidal treatments recorded significantly higher grain yield and nutrient uptake by wheat as compared to control treatment.