6Hall,A.J,Lemloff.J.H,jrapani N,Watwer stress before andduring flowering in maize and its effeets on yield, its compo-nents ,and their altermimants[J].Mayoliea, 1981,26:19-38.
7Duplesiss,P.P,DijkiuisF, J. The influence of time lag betweenPollen -shedding and silking on the field of maize [J].SouthAfrican Journal of Agricultural science, 1967,10:667-474.