رده بندی خاک – Environment USDA Soil Taxonomy: Soil Orders And Their Major Characteristics دستهبندی نشدهسپتامبر 20, 2018توسط admincopdsiranنمایش همه 10s دیدگاه http://www.copdsiran.org/wp-content/uploads/2018/09/Soil-Clasification-On-.mp4 USDA soil taxonomy (ST) developed by United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties) and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series. The classification was originally developed by Guy Donald Smith, former director of the U.S. Department of Agriculture’s soil survey investigations
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