[Objective] The comprehensive evaluation of soil nutrient geochemistry in Guanzhong region of Shaanxi Province was studied

to provide scientific basis for land quality

ecological management and rational utilization of land resources.[Methods] Based on 12 evaluation indexes such as mass nutrients

medium nutrients

and trace nutrients in the geochemical survey of land quality

a multi-level fuzzy comprehensive evaluation model based on entropy weight was constructed. The entropy theory was used to determine the weight. The grades were vaguely evaluated by multiple levels

to divide the differences among the evaluation indicators in Guanzhong area.[Results] The proportion of first and second class of mass nutrients accounted for 2.0%. The proportion of first and second class of medium nutrients accounted for 30.31%. The proportion of first and second class of trace nutrient accounted for 66.42%. The proportion of first and second class of soil nutrient geochemistry accounted for 33.52%. The mass nutrients

medium nutrients

and trace nutrients were all lack in the valley area. The medium nutrients and trace nutrients were rich in Weibei plateau

but the mass nutrients was lack. The mass nutrients

medium nutrients

and trace nutrients were rich in the middle and low mountains. The trace nutrients was rich in the northern edge of the Qinling Mountains

and the mass nutrients were at a moderate level

while the trace nutrients were lacking.[Conclusion] The mass nutrients is lacking

while the medium nutrients and trace nutrients are rich in Guanzhong area. The comprehensive evaluation level of soil nutrients is mainly the second

third and fourth level

but the spatial variation is large. To improve the soil productivity in Guanzhong area

it is necessary to apply the fertilizer of mass nutrients as a whole

and at the same time

to apply the medium nutrients and trace nutrients in different landscape areas.