Protective cultivation is an advanced tilling technology to smash crop straw directly and spread it evenly on the soil surface with harvesting machinery or straw-soil returning machinery, then implement no-till planting, so as to improve soil structure, fertilize soil, optimize ecological environment, realize cost decreasing and effect increasing and sustainable development.

Contribution Analysis of Factors' in the Process of Environmental Optimization in Zhejiang Province;

This paper discusses in terms of educational ecology the importance of building up a beautiful campus environment on the basis of the practical conditions of Three Gorges University (TGU), puts forward some principles of campus construction and environmental optimization and illustrates the characteristics and stylistic pursuit of the comprehensive campus construction plan of TGU.