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Thursday, April 1, 2010

How to Identify Soil's Structure on field ?

Soil structure is a small clump of soil grains. Clumps of soil structure is due to grains of sand, silt and clay bound together by an adhesive such as organic matter, iron oxides, and others. Small clumps (soil structure) has a shape, size, and stability (resistance) that is different.

Soil structure are grouped into 6 forms. The six forms are:
(1) Granular, namely soil structure in the form of granules, spherical and porous, these structures are on the horizon A.
(2) blob (blocky), a blob-shaped structure made of land and angular blocky, shaped like a cube with rounded corners for rounded and angular blob sharp angular blocky, with a horizontal axis equal to the vertical axis, these structures are on the horizon B on the ground wet climate.
(3) Prism (prismatic), namely the structure of soil with vertical axis is greater than the horizontal axis with flat tops, these structures are on the horizon B soil dry climate.
(4) Pillar (columnar), namely the structure of soil with vertical axis is greater than the horizontal axis with the upper part membuloat, these structures are on the horizon B soil dry climate.
(5) Plate (platy), ie soil structure with a vertical axis is smaller than the horizontal axis, this structure is found in the A2 horizon or on a layer of clay Rock. (6) Crumb (single grain), the soil structure with spherical shape and highly porous , this structure contained in the horizon A.

Soil formed in areas with high rainfall is generally found in crumb or granular structure in the top soil layer (top soil) which is on the horizon A and clot structure in the B horizon or soil layer below (sub soil). However, on land that formed in the region
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