Abstract
Today, due to high prices and destructive effects of uncontrolled use of chemical fertilizers on the environment and the quantity and quality of agricultural products, use of sulfur as a food ingredient and acidifying soil considered., its role in soil improvement and agricultural production. In order to evaluate and compare the effect of sulfur on yield and the ability to absorb nutrients, on oilseed safflower, canola, corn and fodder plants sorghum and pigweed in a calcareous soil a factorial experiment was conducted based on randomized complete blocks design with three replications. The experimental factors contain sulfur fertilizer in two levels without application and consumed 500 kilograms per hectare. The results showed that the use of sulfur caused a significant increase in wet and dry weight in all plant species and the maximum increase was observed in corn and sorghum species. The use of sulfur causes significant increase absorption of iron and zinc in roots and shoots of all species of plant. Among the oilseeds, the effect of sulfur application on corn and canola was higher than safflower, and the sorghum forage had better performance than the pigweed.
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