At present, Northeas謝站t spring corn is 金秒in the big bell stage, Northwest spr喝些ing corn is in th那地e heading stage, and Huanghuaihai s我些ummer corn is in 我線the jointing stage,which is the windo件說w period for corn popul國自ation construction and yield f低輛ormation. Recently, there At present, Northeast spring corn i又票s in the big bell s少哥tage, Northwest spring c湖低orn is in the headin國會g stage, and Huanghua雜知ihai summer corn is in the jo弟她inting stage,which is 門鄉the window period影喝 for corn population construc那電tion and yield formation.這年 Recently, there