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2. Potting soil - Wikipedia

   en.wikipedia.org/wiki/Potting_soil

   A soil test may be done to analyze the chemistry of a potting mix, despite the mix not necessarily being made of soil. As an approximation for indoor home planting, the mix is generally treated as greenhouse growth medium. The main method is a saturated media extract (SME), which tests the chemical contents of a water extract of the mix. [13] [15]

3. Triple mix - Wikipedia

   en.wikipedia.org/wiki/Triple_mix

   Triple mix is a mixture of three equal parts of topsoil, peat, and compost. It is commercially sold as a means to amend a variety of poor soil conditions. Generally used for establishing or maintaining lawns and gardens.

4. Topsoil - Wikipedia

   en.wikipedia.org/wiki/Topsoil

   Intensive farming methods to satisfy high food demands with high crop yields and growing crops in monocultures can deplete the soil nutrients and damage the soil microbiome. These factors can affect the consistency and quality of the soil resulting in increased erosion. Surface runoff from farm fields is a type of nonpoint source pollution.

5. Unified Soil Classification System - Wikipedia

   en.wikipedia.org/wiki/Unified_Soil...

   The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt):

6. Raised-bed gardening - Wikipedia

   en.wikipedia.org/wiki/Raised-bed_gardening

   Raised bed gardening. Raised-bed gardening is a form of gardening in which the soil is raised above ground level and usually enclosed in some way. Raised bed structures can be made of wood, rock, concrete or other materials, and can be of any size or shape. [1] The soil is usually enriched with compost. [2]

7. Horticulture - Wikipedia

   en.wikipedia.org/wiki/Horticulture

   The choice of growing media and components to the media help support plant life. Within a greenhouse environment, growers may choose to grow their plants in an aquaponic system where no soil is used. Growers within a greenhouse setting will often opt for a soilless mix which does not include any actual components of naturally occurring soil.