有机土壤物质(Organic soil materials)：经常被水分饱和，具高有机碳的泥炭、腐泥等物质，或被水分饱和时间很短，具极高有机碳的枯枝落叶质物质或草毡状物质。
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将有机物质掺入白垩质土壤中将会降低碱性。
Incorporating organic material into chalky soils will reduce the alkalinity.
农舍里的电脑正在检查温度、水和土壤中有机物质的含量。
The computer in the farmhouse is checking the temperature, the water and the level of organic material in the soil.
大多数雨林土壤都很贫瘠，因为它们缺乏矿物质，而且高温和强降雨会在到达森林地面后的4年内破坏土壤中的大部分有机物。
Most rainforest soils are thin and poor because they lack minerals and because the heat and heavy rainfall destroy most organic matter in the soils within four years of it reaching the forest floor.
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