农事活动对水文系统的干扰已成为水资源恶化的重要因素。
It has become an important factor for water resource deterioration that hydrologic system is impacted by farming activities.
农作物的病虫草除害是农业生产中最普遍的一项农事活动。
It is a common agricultural activity to perish the plant diseases and insect pests in the agricultural product.
水田耘耥是水稻田间管理的一项重要农事活动，已有悠久的历史。
Weeding, with a long history, is an important step of farming in the paddy field.
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