[Objective] The objective of this study was to explore the long-term effect of Fenlong cultivation for one time. [Method] The physical and chemical properties of soil and rice yield and quality were investigated and d...
Funded by the National Key Technology R&D Program of China for the 11th Five-Year Plan(2006BAJ04A04);the Natural Science Foundation Project of Liaoning Province(20082008);the Nationd Natural Science Foundation of China(51072122)
The antifreeze critical strength and the pre-curing time of low-temperature concrete were studied by means of guaranteed rate of compressive strength and antifreeze performance for the structural safety requirement of...