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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Contour trenching ： ウィキペディア英語版 Contour trenching Contour trenching is an agricultural technique that can be easily applied in arid sub-Sahara areas to allow for water, and soil conservation, and to increase agricultural production. ==Technique== Trenches can be artificially dug along the contour lines. Water flowing down the hill is retained by the trench, and is infiltrating the soil below. Between two trenches crops can benefit during the growing season (when there is less rain) from the subsoil water reserve gathered during the rainy season. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Contour trenching」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.