Overuse of different chemical fertilizers is one of the causes for the degradation of environment and soil. Biological fertilizers are the newest and most technically advanced way of supplying mineral nutrients to crops. Compared to chemical fertilizers, their supply nutrient for plant needs, minimizes leaching, and therefore improves fertilizer use efficiency. Vermicompost is an organic compou...

wofost is a crop growth simulation model which can simulate crop growth and yield components of annual crops dynamically in the various stages of growth period. some parts of the model outputs (crop yield and crop water requirements) can be used in irrigation planning and management of water resources. in this study, a field research was carried out in a randomized complete block design with th...

to determine the effect of n-fertilizer on nitrogen harvest index (nhi), crop production and growth indices of corn (s.c.704 cultivar), an experiment was conducted with five nitrogen rates (100, 140, 180, 220 and 260 kg n/ha) in a randomly complete block design in four replicates. the effect of n-fertilizer rates on variation of grain yield, number of kernels, 1000-kernel weight, nitrogen harve...

given the important role of crop growth indices for explanation of cultivars yield differences in diverse environmental and agronomical circumstances, this experiment was conducted at research field of tarbiat modares university during 2007 growing season. experimental treatments were arranged in split-plot layout based on randomized complete blocks with four replications. in this research, sow...

introduction saffron as a food, spicy and medicinal plant has more than 62000 ha under cultivation with about 250 tons annual dry stigma production in iran, which includes about 90% of its world production. therefore, this plant has a specific value in agricultural export products of iran (fallahi et al., 2014). due to the important role of saffron in iran’s agroecosystems, the improvement of i...