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Air quality improvement and sulfur fertilizer requirement in agriculture Effects of nitrogen application combined with sulfur on the growth and nitrogen uptake of ginger Effects of Sulfur and Organic Fertilizer Fertilizations on Carbon and Nitrogen Transport in Winter Wheat under Copper and Cadmium Stresses Effects of Sulfur and Nitrogen Fertilizer Combination on Nitrogen Transfer and Leaf Senescence in Stay green Wheat Effects of sulfur application rate on the absorption and translocation of nitrogen and sulfur and grain yield of winter wheat in Guanzhong area of Shaanxi Effect of sulfur fertilizer on amino acid concentration of wheat grain EFFECT OF SULFUR FERTILIZER ON COTTON(GOSSYPIUM HIRSUTUM L.) FRUIT ABSCISSION RATE AND YIELD