3.It was shown that soybean was the best previous crop of sugar beet,which have increased 10. 8%～14. 4%,for root yield,netbenefit increased 26.5%～37.1%than other crops;
4.In certain scale,applying potassic fertilizer and its yield shows a positive relation,1 kg potassium sulphate can increase the fresh Dioscorea zingiberensis about 15.64 kg,the netbenefit is 28 yuan.
5.For deterministic project using single project analysis, one can use net current value method, internal benefit rate method and investment return rate method, and then use the results to determine the feasibility of the project.
6.Script development could benefit immensely from the refactoring, and class browsing support already present in the IDE and in tools such as .NET Reflector.
7.3.Theory system on EIA for transport program is established, including EnvironmentalCost-benefit Analysis, program and design of distribution of traffic net, Extentics and SystemDynamics.
