The ecolonomic evaluation criteria and assessment method forlarge and middle size farms

On the basis of the status quo investigations inseveral typica large and middle size farms and defining princi-ples of ecolonomic evaluation index system.The index systemfor assessing the ecolonomic status of farm was established.The ecological regionization method provided by FAO andmain component analysis method were applied to screening in-dex from index system. On the basis of summarizing the previ-ous research results and in combination with the practical situ-ation of farms ,an evaluating equation（Y=10X₁+0. 075（X₂+X₃）+0.6X₄+5（X₅+X₆）+2X₇+0.15X₈+0.0015X₉）,whican con comprehensively reflect the present ecolonomic sta-tus of farms,was developed and applied in the assessment ofrural ecolonomics.The assessment indexes and methods de-fined in the study can be applied not only in various farms,butalso in various countryside of different regions in China.ItpIays a guiding role in the ecolonomics assessment of varioustypes of ecosystems in different regions of China.