The soil samples of 0~20 cm soil layer were collected randomly from the main wheat producing areas of Shandong Province,and also from the super-high-yielding(>9 759 kg/hm2) and high-yielding(6 750~7 500 kg/hm2) wheat fields in 20 counties,then the content and distribution of available sulfur in wheat field soil were studied.The results showed that the contents of available sulfur in soil of wheat field in major wheat producing areas of Shandong Province were diverse with greater change amplitude.Sulfur-defi...