This procedure specifies production area environment, production technology, prevention and control of plant diseases and insect pests, and production files of pollution-free foods by taking tomato as an example. This procedure is applicable for greenhouse production of pollution-free food in...

In order to objectively and reasonably evaluate the actual and potential value of cultivated land, both social and ecological values are introduced into the classification and grading index system of cultivated land based on the viewpoint of sustainable development, after considering the natural...

By using the software SAS9.2 and the relevant data of consumption level of rural residents in China from 1952 to 2008, the ARIMA model is established. The model is used to analyze and forecast the time series of the consumption level of Chinese rural residents. The results show that in the near...