This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.
本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。
Quality and yield of crop were affected inevitably by agricultural habitat environment that has polluted, resulting in an agricultural economic loss, to bring risk of agricultural production.
农业产地环境受到污染势必影响农作物的质量和产量，造成农业经济损失，给农业生产带来风险。
The characteristics of soil and water loss and crop yield by cross ridge in purple soil of different sloping farmland were studied.
通过在紫色土坡耕地上进行横坡垄作，观测了不同坡度坡耕地的水土流失及作物产量状况。
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