Web Soil Survey - Home
网页2019年7月31日 · Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world. NRCS has soil maps and data available online for more than 95 percent of the ...
Soil | Definition, Importance, Types, Erosion, Composition, & Facts
网页2024年8月16日 · Soil, the biologically active, porous medium that has developed in the uppermost layer of Earth’s crust. It is one of the principal substrata of life on Earth, serving as a reservoir of water and nutrients, as a medium for the filtration and breakdown of wastes, and as a participant in the cycling of elements.
Soil - Wikipedia
网页Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.
What Are Soils? | Learn Science at Scitable - Nature
网页Soils are dynamic and diverse natural systems that lie at the interface between earth, air, water, and life. They are critical ecosystem service providers for the sustenance of humanity.
Soil Basics | Soil Science Society of America
网页In short, soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural resources. Soil is used by people in numerous ways.
SOIL中文(简体)翻译：剑桥词典 - Cambridge Dictionary
网页verb [ T ] formal uk / sɔɪl / us / sɔɪl / to make something dirty, especially with solid waste. （尤指因大便）弄脏. soiled nappies / underwear / sheets 弄脏的尿布／内衣／床单. 习 …
Soil Composition - National Geographic Society
网页2023年10月19日 · composed of living or once-living material. top layer of the Earth's surface where plants can grow. material, including chemicals, air, and moisture, that make up a section of earth. Soil is one of the most important elements of an ecosystem, and it contains both biotic and abiotic factors.
About Soils | Soil Science Society of America
网页What is soil? Soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural …
Soil - Formation, Composition, Structure | Britannica
网页2024年8月16日 · Soil - Formation, Composition, Structure: As stated at the beginning of this article, soils evolve under the action of biological, climatic, geologic, and topographic influences. The evolution of soils and their properties is called soil formation, and pedologists have identified five fundamental soil formation processes that influence soil ...
Soil - Structure, Composition, Properties | Britannica
网页2024年8月16日 · Soil - Structure, Composition, Properties: The grain size of soil particles and the aggregate structures they form affect the ability of a soil to transport and retain water, air, and nutrients. Grain size is classified as clay if the particle diameter is less than 0.002 mm (0.0008 inch), as silt if it is between 0.002 mm (0.0008 inch) and 0.05 ...