Characteristic of water consumption and yields of pumpkins cultivated under water collection and increasing surface soil thickness;

Considering the factors of drought, roughness and thin soil layer, which limited the steady and high crop yield in sandy chestnut soil in north west of Hebei plateau, a field experiment was conducted to study the effects of film mulching on ridge and over furrow for rainwater harvesting, fertilization and increasing surface soil thickness on the water consumption and yields of pumpkins.

The experimental results show that PVA accelerates the hydration of geopolymer cement,varies the morpha and forming position of hydration products and makes the hardened paste denser.

The geopolymer cement making use of the meta-kaolin that was produced by calcining the kaolin from Baoding was studied.

The geopolymer cement,which has excellent mechanical property,was produced by mineral processing tailings of bauxite.

Study on effects of activators on mechanical performance of the geopolymeric cement;

Study on using kaolinite to produce geopolymeric cement;

Study state of geopolymeric cement and the development future of its applicatiom;

The fusion of multi-culture of agrestic settlement——A case of ancient town of Fubao,Luzhou;

Therefore, this text has a foothold in the macroscopic district field of vision, choice the representative of agrestic settlement in Yunnan, inquire into factor function in district, the development mechanism of the agrestic settlement, then make an outlook in the future to agrestic settlement.

The Jingsheng agrestic settlement conformation is a properly developed one and has been kept well.