During past years the status of the trace elements in soils of guzhou and Huaiyin districts of Jiangsu province were studied. The main soil type in these districts is yellow fluviogenic soil derived from the alluvium of the yellow river. Analytical results revealed that the soils of these districts are very poor in manganese, molybdenum and zinc, but rich in available boron and copper. The total content of manganese in soils of these districts varies from 262-662 ppm with an average content of 425 ppm. The exchangeable manganese can not be detected in the surface soil of forty-three percent of the analyzed samples. Forty-nine percent of the easily reducible manganese is lower than the critical value 100 ppm. The molybdenum content ranges from 0.4 to 2.6 ppm with an average of 0.8 ppm. The available molybdenum content is very low and that in the surface soil of ninety percent of the samples is below the critical value (0.15 ppm, extracted by the Grigg's solutibn). The content of boron varies from 15-72 ppm with an average of 47 ppm. The water soluble boron is very high due to the salinization. The available zinc extracted by DTPA solution is also very low. Ita content of eighty-eight percent of the analyzed samples ig lower than the critical value (0.5 ppm). The available copper extracted by DTPA solution is higher than the critical value. Field experiments were carried out in sixteen counties in coorperatibn with local agricultural institutions and people's commons. Fertilization with manganese brings about the increase im yields of wheat, cotton, sugar beet, maize, winter rape, sweet potato, soybean, pea, peanut and several leguminous green manure crops. Mo-fertilization leads to an increase in yield of leewminous crops and Zn-fertilization leads to the increase in yields of paddy and maize. Response of sugar beet and peanut to boron fertilizer is confirmed also.