Abstract: Soil fertility of 514 soil samples in the rapeseed production district in Tonglu County was investigated in 2010. The results showed that the contents of organic matter ranged from 169 to 300 g·kg-1， with an average of 233 g·kg-1. The contents of total N were 093～234 g·kg-1， and the average was 173 g·kg-1. The contents of available N， P and K were 187～2680 mg·kg-1， 06～1331 mg·kg-1 and 1～238 mg·kg-1， respectively， with the average of 827， 157 and 636 mg·kg-1， respectively. Based on the available N， P and K content， nutrient deficiency area accounted for 681%， 467%， and 693%， respectively， of the total rapeseed fields in the present study. Rapeseed yield was significantly correlated with soil available N contents (r=0851**， n=15) and soil available P (r=0553*， n=15). But no significant relationship was found within the contents of organic matter， total N and available K with rapeseed yield.

Key words: soil fertility, rape, formula fertilization by soil testing