名词
中文翻译：腐殖土
同义词：
['organic matter', 'humus', 'humus content']
例句：
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1. The soil is rich in humus, which is essential for plant growth.
土壤富含腐殖土，对植物生长至关重要。
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2. The organic matter in the soil helps to improve its fertility.
土壤中的有机物质有助于提高其肥力。
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3. The humus content in the soil can be measured using a soil test kit.
土壤中的腐殖含量可以通过土壤测试套件进行测量。