Soil water content, soil organic matter content, soil roughness and soil texture etc. are very important information in precision farming.
对于土壤来说，土壤湿度、土壤的有机质含量、土壤粗糙度、土壤质地等特性是精准农业中所需要的重要信息。
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The relationship between the soil water content from the jointing of wheat to the heading and Numbers of grains of every ear of wheat is the closest in the dry farming regions of the Loess Plateau.