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surface horizon造句

"surface horizon"是什么意思   

例句與造句

  1. Significant seasonal changes of microbial numbers were observed in surface horizon
    Cm深土壤細(xì)菌生物量有明顯的季節(jié)性變化,從
  2. Denitrification and nitrogen fixation in 10 cm 20 cm horizon are higher than those in other soil horizons , in which the partial pressure of oxygen is lower than that in surface horizon , and the number of microorganisms is more than that in below horizon
    高寒草甸土壤中未發(fā)現(xiàn)有好氣性自生固氮菌,但嫌氣性自生固氮菌的數(shù)量眾多。在高寒草甸嚴(yán)酷的自然條件下,嫌氣性自生固氮菌為大氣氮素固定的主要承擔(dān)者。
  3. 2 . the diagnostic surface horizons divided on the soils of the area are mollic epipedon , umbric epipedon and ochric epipedon . the diagnostic subsurface horizons are cambic horizon , argic horizon , histic evidence and mattic evidence . the diagnostic characteristics are sapric soil materials , folic soil materials , soil moisture regimes , soil temperature regimes , ferric property and base saturation
    本地區(qū)土壤劃分出的診斷表層有暗沃表層、暗瘠表層和淡薄表層,診斷表下層有雛形層、粘化層,診斷現(xiàn)象有有機(jī)現(xiàn)象、草氈現(xiàn)象,診斷特性有6個(gè):高腐有機(jī)土壤物質(zhì)、落葉有機(jī)土壤物質(zhì)、土壤水分狀況、土壤溫度狀況、鐵質(zhì)特性、鹽基飽和度。
  4. It's difficult to find surface horizon in a sentence. 用surface horizon造句挺難的

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