Abstract: The main soil fertility indexes of the soil samples collected from the orchard of Kangji ecological farm,Chengwu County of Shandong Province, normal agriculturalland and waste land(as check)were separatively determinedand analyzed with the method of comparative analysis, The results show that the soil fertility of planting orchard has been improved from the 5th grade before the exploitation to the 3rdgrdde after the exploitation , which is equal to nedrby normalfarmland. The contents of organic matter, total nitrogen. quick-effective nitrogen and phosphorus have been obviouslyraised. And the degree of salinization has been reduced. However,there is a potentiality in improving the soil fertility of theecological farmland. 

Key words: soil fertility, PCA, Fuzzy comprehensive evaluation