Analysis on the soft nutrients of citrus orchards in demonstration are8 of environmental immigrants，Northwest Guangxi

S0il nutrients of citrus orchards in demonstration area of environmental immigrants．Northwest Guangxi were tested．The results show that the soil fertility in the area is characterized by abundant organic matter，low total N，total P and total K，optimum hydrolyable N and available P，and strong acidity．The major nutrient variable coefficients in differ-ent citrus orchard soils are over 16％ and pH variable coefficient of the soll is 4.4％．The soil nutrient differences of citrus orchards of different yield grades are mainly shown in the amount of hydrolyable N and available K．The contents of hy-drolyable N and available K are 106.46mg／kg and 76.21mg／kg respectively in high-yield citrus orchards and are 96.88mg／kg and 59.83mg／kg respectively in low-yield citrus orchards．There is an extremely positive correlation between cit-ILlS yields and hydrolyable N and a positive correlation between citrus yields and available K．Also，the indexes of abundance and shortage of hydrolyable N and available K in soils are put forward in this paper．