forest humus soil 森林腐殖质上 ; 森林腐殖
forest-humus 森林腐殖质
forest humus layer 凋落物层
humus under forest floor 林地腐殖质
forest soil humus 森林土壤腐殖质
The Black Death of 1348 was caused by gradual loss of the humus fertility found under forest trees.
1348年的黑死病是由森林树木下腐殖质的逐渐丧失引起的。
Humus layer in different forest types and soil surface type and quantity of soil fungal communities have a significant difference.
不同林型腐殖质层和土壤表层的土壤真菌群落种类和数量都具存在显著差异。
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