ALLELOPATHIC EFFECTS OF SOME WEEDS ON CHICKPEA CROP

Apot experiment was designed to study the allelopathic effect of two weeds (cyperus rotundus l. and sorghum halepense l.) against chickpea plants. the experiment was undertaken in the weed science research laboratoryof the university of agriculture peshawar during winter season 2012. the experiment was laid out in a completely randomized design (crd). weed samples for extract purpose were dried, ground with the help of grinder and then weighed. each time two concentrations were made from each sample @ 150 and 200 g l^-1. the chickpea variety karak-1 was used in the experiment.ten seeds of chickpea were planted in plastic pots with 12 cm height and 15 cm diameter filled with soil. the results showed that all the parameters of chickpea were significantly affected by the allelopathic extracts of cyperus rotundusand sorghum halepense. further research is suggested to investigate the actual phenomena responsible for this variationwithin thesetested plants.