To study the techniques of prediction of population dynamics of yellow stem borer (YSB), we used system analysis and computer techniques, regression models, and
Theory and evidence indicate that trees and other vegetation influence the atmospheric water-cycle in various ways.These influences are more important, more com
<正> The field experiment designs with single replicationwere frequently used for factorial experiments inwhich the numbers of field plots were limited, butthe
<正> The mechanization of rice production in China hasexperienced a comparatively long and an undulatingprocess.The full-scale making of mechanization ofirrigat
<正> Seedlings of drought-tolerance rice varieties Han 501and Han A03,and the drought sensitive varietiesNanjing 11 and Yanjing 2 were raised in a paddyfield an