While soil texture describes the percentage of each size class (sand, silt and clay), soil structure is the organization of these individual soil particles into a larger arrangement. The size and orientation of the aligned particles means that structure affects acceptance (and thus water treatment) in a similar way as texture.
Structure is described in three parts: grade, size and type. Grade refers to the expression of the structure; size refers to the size of the individual structural units (peds); type refers to the shape of the ped. All these parts of the description can be related to both water movement and treatment.Soil
