To analyze the efficiency of the agro-ecosystem of Dongting Rim in Hunan Province,this paper adopted the emergy theory to study the agricultural output of this
As an essential part of the grassland ecological system,study on the carbon storage has great significances to the carbon reduction in grassland ecological syst
Using the data of 11 climatic factors on 40 counties in the main producing areas of walnut of Yunnan Province,we analyze the impact of various climatic factors
Long term of grain production subsidy policy can be guaranteed only with sound and sustainable development of economy,stable growth of fiscal revenues,and impro