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Significantly increased crop yields in China
 
· Among the crops tested, citrus, soybean, sugarcane, sweet potato, peanut, rapeseed and tea had the highest yield response at 10% or greater.
 
· A total of 63 field trials were conducted to examine the residual effect of sulphur fertilizer. Crop yields had been increased by S fertilizers applied in the preceding crops in 35 field trials, ranging from 2% to 7%, equivalent to 40 to 60% of the direct effect of S fertilizer.
 
· Better S fertilizer responses in crop yield were obtained in most southern provinces where fertilizer consumption is high and soil S deficiencies severe, such as Jiangsu, Yunnan, Jiangxi, Anhui, Fujian, Guangdong and Guangxi Provinces.
 
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