ѵԢͧشԹѴ


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ͪشԹ  :  §  Chiang Rai (Cr)
 
 
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Apg
0-11
Grayish brown to light brownish gray (10YR5-6/2) silt loam to silty clay loam; few fine faint yellowish brown (10YR4/4) mottles; weak coarse and medium subangular blocky structure; friable, sticky, slightly plastic; common fine and very fine roots; strongly acid (field pH 5.5); clear, smooth boundary.
ABg
11-26
Light brownish gray (10YR6/2) silty clay loam; common fine distinct strong brown (7.5YR5/8) mottles along root channels; very weak fine and medium angular blocky structure to massive; hard, firm, sticky, plastic; few fine and very fine roots; very strongly acid (field pH 5.0); clear, smooth boundary.
Btg1
26-43
Light gray (10YR7/2) clay loam; common fine distinct brownish yellow (10YR6/6) and few fine prominent red (2.5YR4/8) mottles; weak coarse and medium subangular blocky structure; firm, sticky, plastic; patchy thin clay coatings on ped faces, broken thin clay coatings in tubular pores; few fine and very fine roots; very strongly acid (field pH 4.5); clear, wavy boundary.
Btg2
43-64
Light gray (10YR7/1) clay loam; common medium prominent dark red (10R4/8) and few medium faint brownish yellow (10YR6/6) mottles; weak coarse subangular blocky structure; firm, sticky, plastic; continuous thin clay coatings in tubular pores; very few fine roots; very strongly acid (field pH 4.5); gradual, smooth boundary.
Btg3
64-100
Light gray (10YR7/1) clay; many medium and coarse prominent red (2.5YR4/8) common fine and medium distinct brownish yellow (10YR6/6) mottles; moderate coarse subangular blocky structure; very firm, sticky, very plastic; continuous moderately thick clay coatings in tubular pores, broken thin clay coatings on ped faces; few fine and medium animal holes; some of red mottles are changing to fine soft iron concretions; no root; very strongly acid (field pH 4.5); gradual, smooth boundary.
Btcg
100-120+
Light gray (10YR7/1) clay; many fine, medium prominent red (2.5YR5/8), many fine and medium distinct strong brown (7.5YR5/6) mottles; weak coarse breaking to weak fine subangular blocky structure; very friable, very sticky, plastic; continuous thin clay coatings in pores; few fine animal holes; many (20%) large and very large (?4 cm.) hard irregular iron-manganese concretions; no root; very strongly acid (field pH 4.5).