3～4月份主要农作物农事安排
Science and Technology of Tianjin Agriculture and Forestry（2012）
Abstract
<正>3月和4月的农事节气有惊蛰、春分、清明和谷雨,农事活动为小麦春季管理、棉花播种、水稻育秧,其它春播作物陆续进入播种期。冬小麦的春季管理待冻土层消失即3月20
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