A filed experiment was done to develop management practices to reduce the use of
synthetic herbicides, in the arid and semi-arid agricultural ecosystems of north
east of Iran. Five treatments including I: chopped residues of canola (Brasica
vulgaris), II: chopped residues of wheat (Triticum aestivum) both were
separately incorporated to 25 cm depth soil, 20 days before sowing, III: shoot
aqueous e... hiện toàn bộ