氧化铁是土壤中最为丰富的金属氧化物，在土壤的氧化还原反应和土壤形成过程中起着十分重要的作用。
Ferric oxide is the most abundant metal oxide, and it is very important in oxidization - reduction of soil and in soil-shaped process.
凋落物分解是森林生态系统养分循环中的重要过程，对土壤有机质的形成和养分释放有重要意义。
Forest litters decomposition was an important process of nutrient cycling in forest ecosystems, and played a central role in soil organic matter formation and nutrients release.
土壤干层的形成是气候干旱化过程中必然出现的现象，它是导致植被演替的直接原因之一。
The formation of LMLS is a specific phenomenon during the process of climatic drought, and is one of the direct causes of vegetation pattern evolution.
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