An evaluation method of soil integrated fertility was developed and us ed in the Houhu farm enterprise

with soil fertility being considered as a comp lex of the state of soil nutrients and the capacity to regulate and transform th e materials needed by plants. With systematic principle and the soil data of the Houhu farm enterprise

9 indexes were divided into two groups representing sep arately states of soil nutrients and environments of nutrients supplying

includ ing content of total N

total P 2O 5

total K 2O

available P 2O 5

availab le K 2O

pH

physical clay

silt-clay ratio and thickness of soil surface lay er ( epipedon). Then two types of membership functions of these indexes

S-type and parabola-type

were developed based on their effects on plants. Their valu es of function were also calculated. Through factor analysis of these values wit h the Analytical Hierarchy Process (AHP)

weight values of these indexes were decided. Finally

with Analytical Clustering Process (ACP)

soils fertility was divided into 5 classes in this area. With GIS software MAPGIS

the map of soil c omprehen sive fertility in the Houhu farm enterprise area was drawn. The soil f ertility in this region was mainly in 1

2 classes

and area of soils in 1

2

3

4

5 classes amounts 24.25%

52.34%

11.20%

6.15% and 6.06% respectively.