Allelopathic effect of sunflower residues on some soil properties and growth parameters of wheat, bean and flax crops

Allelopathic effects of the sunflower verities Helianthus annuus residues were evaluated on some soil properties and their potential against growth parameters proposed successive crops Wheat Triticum aestivumL., Broad Bean Vicia fabe L. Flax Linum UstatissmimL. Sunflower plants chopped incorporated with field after getting seed, then cultivated. The have reinforced macronutrients considered essential for germination any crop. organic matter content percentage carbon in ground increased. Significant suppression broad bean flax was observed, while did not affect wheat growth. results obtained showed that are recommended to grow crop avoid losses due negative allelopathic these crops. residue incorporation may provide multidimensional benefits better weed control, enhanced health, higher seed yield wheat. Keywords: effect; residues; Succssesive Crop injury symptoms