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1·Humus is classified according to how well it is incorporated into the mineral soil, the types of organisms involved in its decomposition, and the vegetation from which it is derived.

根据腐殖质与矿物质土壤的结合程度、分解作用中所含的有机物类型以及原有的植被，腐殖质可区分为几个类型。

2·The mineral elements from the soil that are usable by the plant must be dissolved in the soil solution before they can be taken into the root.

土壤中对植物有用的矿物质元素必须先溶解在土壤溶液中，然后才能被根吸收。

3·In modern agriculture, mineral depletion of soils is a major concern, since harvesting crops interrupts the recycling of nutrients back to the soil.

在现代农业中，土壤的矿物损耗是一个主要的问题，因为收割农作物会中断养分的循环，使其无法重新回到土壤中。

4·The United States is a land rich in mineral resources and fertile farm soil, together with a moderate climate.

美国具有丰富的矿产资源和肥沃的农田，气候温和适中。

5·The team is investigating elements in the mineral calcium carbonate, which were deposited in the mud and soil in and around a lake between two and 1.7 million years ago.

该小组正在调查碳酸钙矿物中的元素，这些碳酸钙矿物沉积于距今2至170万年的湖内部及周边的淤泥和土壤中。

6·Mineral stability can depend upon the amount by which the soil is oxygenated.

矿物的稳定度可由土壤中氧化的程度所决定。

7·In other parts of the continent, people are questioning why they aren't getting more for the mineral riches that lie in abundance beneath Africa's soil.

在非洲大陆的其他地方，人们都在质疑，为什么他们没有从位于土壤之下的丰富矿产得到更多的财富。

8·Abstract: phosphorus is one of the essential mineral elements to plant growth, however, there is fairly less content of soluble phosphorus in soil.

摘要：磷元素植物生长必需的矿质元素之一，而土壤中可溶性磷的含量比较低。

9·Mineral analysis of soil samples in the laboratory, the island's volcanic soil at least contain a so-called saprolite weathered rock.

在实验室对土壤样品进行矿物质分析，发现岛上的火山土壤至少含有一种称之为腐岩的风化岩石。

10·Brazil nuts. Thanks to the rich soil in which they grow, Brazil nuts are loaded with selenium, a trace mineral that some research has linked to upbeat moods.

巴西坚果。由于种植巴西坚果的土壤肥沃，巴西坚果富含硒，这是一种微量元素，某些研究表明它与提高情绪有关联。