<正> According to the analysis of 654 soil samples collect-ed from 45 counties in Zhejiang Provence,73.7% ofpaddy field showed Si deficient.During 1991 and1993,
Background: Prescribed burning is a common practice of site preparation before afforestation in subtropical forests. However, the effects of prescribed burning
In the Yangtze river aera, the first crop of indica rice is sown in fate Max to eariy Apt and transplanted in early May. Usually, seedlings perish when abnormal
<正> Rice leaffolder (Cnaphalocrocis medinalis Guenee)has become a serious pest on rice in Jiangsu Province.The insect appeared in Jul and remained until Sep. A
It has been proved that high yield combinations can be obtained via hybridization between indica and japonica rice. However, people have worried about the quali
The early literatures reported that a lot of matrix interference were encounted in the determination of lend content in various samples. Chlorides produced seri
From 1986 to 1990, we conducted a research projoct to study the theory and techniques of supca-high yielding and developed a set of new cultural techniques call