However, our present breeding in fence has led to weakening of the cattles health condition, decreasing of their multiplication ability, deterioration of grassland, and losing balance of ecology, poor ability of intensive administration.

Studies on the proper culling of cows in the free stall feeding system;

The structural features of sow farrowing pen, and the technical requirements forpiglet warming shelter and separated raising pen.

Utilization and Protection of the Submerged Plant Resources by Pen-crab Culturing in Nushan Lake;