This paper analyzes precipitation and wheat yield over the calendar year in Zhengzhou and divides wheat growth period into five stages. It concludes that precipitation sensitivity to wheat yield is different in the wheat growth stages: subsoil moisture water weight accounts for 20%, water weight in the wintering period accounts for 26%, water weight from turning green to flowering stage accounts for 32%, water weight at filling stage accounts for -11%. In which, precipitation from jointing to booting stage ...
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