精选优质文档-倾情为你奉上A1层 AI horizonA2层 A2 horizonABC型土 ABC soilAC型土 AC soilAG型土 AG soilAo层 Ao horizonAp层 Ap horizonA层 A horizonBC型土壤 B C SoilB层 B horizonC层 C horizonG层 G horizonH层 H layerL层 L layerpF曲线 pF curvepF值 pF valuepH值 pH ValueU形沟蚀 U-shaped gullyingV式节制坝 V-type check damV形沟蚀 V-shaped gullingV形拖板 V-dragX线分光分析 X-ray spectrophyX线绕射分析 X-xayd iffraction methody次量养分元素， Secondary nutrient element(即 Secondar
