It is reported that the Combined Latin Square Design(CLSD) was used in field experiment for comparing some cotton varities and it was confirmed that whatever soil fertile difference was showed in one or two ways, the efficience of experiment may be improved by using CLSD So that the CLSD should be used to substitute the RBD which is used generally in field experimen

Evaluation on the design of construction organization based on grey correlation analysis

In order to realize composition character of high modulus asphalt concrete(HMAC),the material composition design method of HMAC in France was analyzed,special adjustments about grade type,molding method,determination of the optimum asphalt content,certification tests of Marshall design method were conducted and were verified with Marshall test,rutting test,moisture damage test and modulus test.