According to statistics from 1991 to 2005 in Tongwei County

factors which impacts modern agricultural development were analyzed by the principal component analysis.The results can be grouped into three aspects: agricultural modern level

the population quality and quantity and land productivity.At the same time

the grey correlative degree was used to analyze these factors.We brought forward some countermeasures

e.g.

increasing investment in agricultural science and technology

rational utilization of chemical fertilizers

and promoting the level of agricultural modernization;the protection of arable land

increase the sown area of crops and cash crops;strictly controlling population growth

vigorously developping

science and technology

and education

etc.