There
are size broad categories of soil
structure.
1.
Granular (high permeability), the diameter of
the rounded structure is about 15mm, it
is weak and porous
2.
Single
grain: (highly permeable),
aggregates are no cemented together
3.
Blocky (,moderate permeability’ 5-50mm in diameter, they are (aid
in block or irregular form
4.
Platey
(low permeability) diameter is 1-10mm,
laid in plate like forms
5.
Columnar
or prismatic (low permeabity) 10-100 mm in diameter, they are arranged in prism. Like manner with the vertical axis longer than the horizontal
6.
Massive
structure (low permeabity)