Definition: In agricultural science, a subsoil refers to the soil below the topsoil. The term "subsoiled" means that it is less dense than the topsoil and thus can support plants more easily. For example, in a garden where there are rows of flowers, the subsoiling could be the soil between the flower beds, rather than the entire soil layer. In this case, the subsoiling would be less dense than the topsoil, allowing for easier access
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