In this paper, stress conditions of smoothened method and filling method processing on the core was analysised, and the use of the finite element method and the test results measured values show a definite distinction between the two.

The purpose of the paper is to assess the project of no net loss of cultivated land based on agricultural land classification, so as to provide technical support and practical foundation for evaluating the government in implementation of the policy.

Evalution method study on the farmland quality dynamic balance-A case study in bazhou county, Hebei pvovince;

It is a very important issue to keep dynamic balance of total amount of cultivated land and realize the sustainable development in China Socio-economic development.

With farmland quality dynamic balance in different agricultural ecological sections as the research object and based on the theories and achievements of farmland classification and grading,this paper analyzes the problems in the present work of dynamic balance and puts forward ideas and methods for farmland quality dynamic balance in different agricultural ecological sections and establ.

A gene expression cassette with molecular size of the insert, a recombinant plasmid containing the PK gene of PRV,equal to vector was cloned through partial repair of the terminal ends of insert and vector, thus transforming them from nonadherent to adherent ones.

The application of agricultural land converts to the balance of arable land;

The most serious problem of the balance of arable land in China is that the quality balance was overlooked while the quantity balance was considered,and there are no valid quality judgment standard and test mechanism on the new arable land.