Growth behavior of irrigated wheat as influenced by annual growth cycle of Populus deltoides M. plantations in alluvial soil

A field study was conducted for two years to investigate the variation in growth behavior of irrigated wheat at different stages of growth due to growth and advancement of age of the poplar trees. It was estimated that leaf litter added on an average 11.9, 2.5, 7.9, 21.3 and 8.9 kg ha^-1 nitrogen, phosphorus potassium, calcium and magnesium, respectively in the soil. Near poplar tree line (0-3 m) higher organic carbon (0.53%), total nitrogen (0.07%), available K (137 kg ha^-1), exchangeable Ca (0.24%) and exchangeable Mg (0.13%) contents were recorded. Wheat plant population was the most important parameter, which was affected during the leaf shedding stage of poplar. During dormant period of poplar, significantly lower values of plant height, leaf area index and dry matter yield of wheat were recorded. During the leaf flush period, grain weight decreased compared with the control near the tree line (0-3m), but a synergetic effect was realized between 6-9 m distance from the tree line.