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2. Soil - Wikipedia

   en.wikipedia.org/wiki/Soil

   Soil is used in agriculture, where it serves as the anchor and primary nutrient base for plants. The types of soil and available moisture determine the species of plants that can be cultivated. Agricultural soil science was the primeval domain of soil knowledge, long time before the advent of pedology in the 19th century.

3. USDA soil taxonomy - Wikipedia

   en.wikipedia.org/wiki/USDA_soil_taxonomy

   The soil moisture regime, often reflective of climatic factors, is a major determinant of the productivity of terrestrial ecosystems, including agricultural systems. The soil moisture regimes are defined based on the levels of the groundwater table and the amounts of soil water available to plants during a given year in a particular region.

4. Soil type - Wikipedia

   en.wikipedia.org/wiki/Soil_type

   All soils that share a certain set of well-defined properties form a distinctive soil type. [1] Soil type is a technical term of soil classification, the science that deals with the systematic categorization of soils. Every soil of the world belongs to a certain soil type. Soil type is an abstract term. In nature, you will not find soil types.

5. Soil science - Wikipedia

   en.wikipedia.org/wiki/Soil_science

   A soil scientist examining horizons within a soil profile. Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.

6. Soil classification - Wikipedia

   en.wikipedia.org/wiki/Soil_classification

   Soil texture triangle showing the USDA classification system based on grain size Map of global soil regions from the USDA. For soil resources, experience has shown that a natural system approach to classification, i.e. grouping soils by their intrinsic property (soil morphology), behaviour, or genesis, results in classes that can be interpreted for many diverse uses.

7. Wood Chips Are the Secret to Healthy Soil and Plants ... - AOL

   www.aol.com/wood-chips-secret-healthy-soil...

   To insulate the roots of your plants, add a 2—to 3-inch layer over the soil. Compost Wood chips are carbon-rich, making them a great material to use in compost.