Abstract
Nan Ling commodity grain base is a national high-standard farmland
demonstration area. Scientific evaluation of soil environmental quality
is of important significance to plan land resources rationally to
improve the quality and efficiency of agricultural production. This
paper try to apply the Radar Chart–a visual graphic data analysis
method–to the assessment of soil environmental quality. In the
assessment, a new idea was introduced that area and perimeter of radar
chart represents the soil environmental quality and the difference
between the qualities of the soil environmental quality indicators
respectively. Different from the other assessment methods,the Radar
Chart method transforms data into graphics and through an intensive
analysis of graphics, the data information can be retained and excavated
more fully. It was proved through this case study that the application
of Radar Chart method to the assessment of soil environmental quality is
feasible and it is more intuitive, efficient, comprehensive and fine.
The results indicated that the soil environmental quality at depth of
0-60cm in low mountain area of Nan ling commodity grain base is the
second grade while that in the hilly and plain area are both the first
grade. The indicators of poor soil environmental quality in low mountain
area are Cd and As, those in hilly area are Cd、As and Hg, and that in
plain area is Cd; The difference between the qualities of the soil
environmental indicators in low mountain area is more significant than
that in hilly area and plain area.