Abstract: Good quality of the water sources is essential to WS, especially, the sprinkler irrigation and micro-irrigation.It is required that the irrigation water contains no or little sediment.

 
  • 文摘:節水灌溉對水源水質(zhì)要求很高,尤其是噴灌、滴灌要求水流不含沙或含沙量很小。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan