1. Humus is classified according to how well it is incorporated into the mineralsoil, the types of organisms involved in its decomposition, and the vegetation from which it is derived.
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。
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3. In modern agriculture, mineral depletion of soils is a major concern, since harvesting crops interrupts the recycling of nutrients back to the soil.
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。
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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.
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。
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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。
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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。
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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。
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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.
11. It results from cosmic rays reaching the earth from the outer space, and from the radioactive decay of mineral in the soil.
它来自星际空间抵达地球的宇宙射线，来自土壤中矿物质的放射性衰变。
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12. The soil nutrients, the contents and seasonal dynamics of mineral elements as well as the relationship among the elements in leaves of fruit-bearing trees of Citrus grandis Osbeck cv.
13. The time of dynamic nitrogen adjustment were determined by regular patterns or by the comprehensive evaluation of soilmineral nitrogen concentration and rice population status.
14. Many indexes can be used to reflect character of expanded soil. They are divided into mineral composition and engineering behavior.
反映膨胀土土质与土体特性的指标很多，可分为反映矿物组成和工程特性的指标两大类。
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15. Phosphorus is one of the essential mineral elements to plant growth, however, there is fairly less content of soluble phosphorus in soil.
磷是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。
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16. Combined with the fitting parameters obtained from the VG model, the effects of mineral composition and pore structure of the soil on SWCC are analyzed.
结合VG模型拟合的参数，着重分析了矿物成分和孔隙结构对膨胀土土水特征曲线的影响。
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17. The content of mineral element is correlated with soil textural composition.
矿质元素含量与土壤质地密切相关。
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18. The physical properties, mineral composition and expansive-shrinkage characteristics of the borrow soil were studied, and the evaluation of expansive potential was carried out.
研究了路基土场土的物理性能、矿物组成及胀缩特性，采用多种方法综合评价土场土膨胀潜势；
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19. The increased content of the soilmineral nutrients could reduce chalkiness rate of rice.
不同土壤的矿质养分含量增加可降低稻米垩白；
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20. Natural resources as mineral water, clay, swell soil, peaty soil and building sand are also quite rich in amount.
矿泉水、粘土、膨润土、泥炭土、建筑用砂等资源也都十分丰富。
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21. The mineral nitrogen in soil was greatly changed no matter whether wheat was planted or not.
种与不种作物，土壤矿质氮都处在不断变化之中。
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22. The management of the straw returning to the fields was closely related to the dynamics of mineral nitrogen in the soil.
土壤中矿质态氮动态变化是秸秆还田管理决策的重要依据。
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23. Adsorption capacity of mineral is stronger than that of soil.
矿物的吸附能力比土壤强。
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24. The ebony is really specific groundwater, soil and other natural conditions and to adapt to the mineral content in order to form.
真正的乌木实在特定的地下水，土等自然条件下和适应的矿物质含量中，才能形成。
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25. The results show that different soil types or subtypes of soil have markedly different mineral compositions, and that the number and contents of mineral species vary greatly.
不同土类或亚类土壤中矿物组成存在明显差异，矿物种数和含量变化较大。
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26. The critical content of mineral oils in soil was presented for second-year-old Reed canary grass.
提出了第二年生草土壤的矿物油临界含量。
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27. With the improvement of the content of soil moisture, the mineral nutrition uptake amount improves notably.
随着土壤水分含量的提高，植株对矿质元素的吸收量显著提高。
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28. The influence factors of CBR of expressway subgrade materials are studied, such as the soil particle sizes and mineral components.
