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Impacts of economic development models on ecosystem service values: a case study of three mountain villages in Middle Shandong, China Development model and photoperiod sensitive parameters in barley Preliminary study on population stucture and its dynamic development of Pentaphylax euryoides in the hilly country of Northeast Guangxi Systemac Concept and Dcvelopment Model for the Production Base of Gynostemma pentaphyllum(Thunb.)Madino Regional programming and development models for touring agriculture in hilly an of Taihang Mountains- A case study from Hebei Province Research on progress of rainwater harvesting agriculture on the Loess Plateau of China ON THE ESTABLISHMENT AND APPLICATION OF A SIMULATION MODEL FOR INSECT POPULATION DEVELOPMENT Discussion on innovation model of Chinese materia medica based on “preceded pharmacokinetics”