Effects of row spacing and weed management on weed density, the percentage of bi-seed pods and biomass yield of chickpea (Cicer arietinum L.)

For the purpose of investigating the effect of row spacing and management on weed population, chaff yield and the per cent of chickpea binodule pods, an experiment was conducted factorially in the frame of random complete blocks layout with three replications in the experimental field of Lorestan university agricultural college during 2006. Experimental factors included row spacing in four areas including 15, 20, 30 and 40 cm row spacings with 50 bushel constant density perimeter sq and weed management per five areas including weedy control single and double weeding, pyridate post-emergence application and Fomesafen pre-emergence application. By increasing cultivation row spacings, chaff yield and per cent of chickpea bi-seed pods decreased but weed density increased. Between managarial treatments, the less weed density related to treatment of two-stage weeding and most of it related to marker without control. The process area of the per cent bi-seed functions in the weeding treatment was affected by the main factors of experiment relative to the other treatments which were in priority. There was no significant difference in the pyridate common herbicide.