in order to investigate the effects of nitrogen fertilizer levels and intercropping ratios on yield and other morphological traits of two crops, field experiments were conducted during two years (2010-2011) in the research field of the school of agriculture, shiraz university, shiraz, iran. the study was carried out in a factorial experiment laid out based on a completely randomized block desig...

introduction in agronomy, natural outlook has been expressed in different forms which stable agriculture is an example. stable agriculture is ascribed to the authentic management of agricultural resources, which in addition to fulfilling the ever-changing needs of humans, maintains the health of environment and capacity of water and soil resources. application of herbicides, besides being costl...

concluded that the intercropping system needed to be optimized with respect to crop quality and weed supIntercropping leek (Allium porrum L.) with celery (Apium graveopression for successful implementation and suggested lens L.) is an option to reduce growth and reproductive potential of weeds while maintaining productivity. In this study, a combined applying ecophysiological simulation models ...