Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.
蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。
Loose, friable soil, rich in humus and fit for planting.
疏松，易碎的土壤，富含腐殖质并适宜种植。
Clematis will grow best and be the most resistant to wilt if it is grown in deep, humus-rich soil.
铁线莲若生长在深的、富含腐殖质的土壤中，会生成得更好，并且对枯萎病有最大的抗性。
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