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.
What is Soil? - Natural Resources Conservation Service
网页Soils perform vital functions to sustain plant and animal life, regulate water flow, filter and buffer pollutants, cycle nutrients, and provide physical stability and sort. This definition is from the Soil Science Society of America.
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.
Soil Basics | Soil Science Society of America
网页What is soil? 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. Because of this, it has many definitions.
What is soil? | Soil | Farm management - Agriculture Victoria
网页Soil is the loose surface material that covers most land. It consists of inorganic particles and organic matter. Soil provides the structural support for plants used in agriculture and is also their source of water and nutrients. Soils vary greatly in their chemical and physical properties.
What Are Soils? | Learn Science at Scitable - Nature
网页Soil is a material composed of five ingredients — minerals, soil organic matter, living organisms, gas, and water. Soil minerals are divided into three size classes — clay,...
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 ...
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 resources. Soil is used by people in many ways.
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.
Soil Composition - National Geographic Society
网页2023年10月19日 · Soil is composed of both biotic—living and once-living things, like plants and insects—and abiotic materials—nonliving factors, like minerals, water, and air. Soil contains air, water, and minerals as well as plant and animal matter, both living and dead. These soil components fall into two categories.
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