凍層土壤 的英文怎麼說
中文拼音 [dòngcéngtǔrǎng]
凍層土壤
英文
gelic soil-
The harder the material under the permafrost is, the larger the chamber charge required.
永凍層之下的土壤越硬,所需要的藥室裝藥量也越大。Permanently frozen subsoil, occurring throughout the polar regions and locally in perennially frigid areas
永凍土永久冰凍的下層土壤,出現在整個北極地區和部分長期寒冷的地區A soil is classified as histosols if it does not have permafrost and is dominated by organic soil materials
如果某種土壤沒有永凍層而又以有機物質為主則可以將其劃分為有機土。But, when the total water quantity is reduced 30 % of present average amount in the 2010, the total salinity of groundwater will have significant increase in the different period ( pre - summer irrigation, post - summer irrigation, pre - autumn irrigation and pre - freezing up of soil four periods ). the water quality will be likely to deteriorate ; in addition, the prediction models of soil moisture and saline concentration are established
通過試區土壤水分、鹽分的bp與rbf模型的模擬與檢驗,預測了2005年、 2010年夏灌前、夏灌后、秋澆前與封凍前的土壤水鹽狀況,得出上壤水分隨著灌水量的減少呈下降趨勢,而土壤鹽分在淺層與中層呈現出不同的結果: oaSnow aids farmers by keeping heart in the lower ground leels, thereby saing the seeds from freezing
雪對農民是一種幫助,因為它保持地層土壤的溫度,使種子不致凍死。分享友人