The paper discusses the necessity and feasibility of effluent zero discharge in the production of base paper for corrugated medium and linerboard from semichemical pulp with straw material and the methods for zero discharge of paper mill wastewater and the way of reutilizing black liquor as resources.

Seeds vigor of rice and wheat germplasm conserved for 10 years at difference initial germination percentage in Yunnan;

In this article,the effects of fertilization on absorption and utilization of rice and wheat are generally uttered.

The local experiment was carried out to deal with the effect of different fertilizer treatments on the absorption and utilization of rice and wheat in the longterm fertilizer experiments in the national monitoring base of purple soil fertility and fertilizer benefit at Southwest Agriculture University in 2000.