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ͪشԹ  :    Tha Rua (Tr)
 
 
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Apg1
0-1
Dark gray to dark grayish brown (10YR4/1-2) clay; massive crust breaking to potsherds of 5 to 10 cm; many micro-pores; very hard.
Apg2
1-4
Dark grayish brown (10YR4/2) clay with few coarse sand grains; many fine distinct yellowish red mottles, mainly in pores; massive; hard; strongly acid (field pH 5.5); abrupt, smooth boundary.
Apg3
4-19
Dark grayish brown (10YR4/2) clay with few coarse sand grains; few fine and many medium distinct yellowish red mottles in pores, root channels and ped faces; very weak coarse and very coarse angular blocky structure; very hard; slightly acid (field pH 6.5); clear, smooth boundary.
Bg
19-60
Mixed dark grayish brown (10YR4/2), dark yellowish brown (10YR4/4) and brown (7.5YR4/4) clay with few coarse sand grains; moderate very fine and fine angular blocky structure; firm to friable, very sticky; many pressure cutan; few iron/manganese nodules; slightly acid (field pH 6.5); gradual, smooth boundary.
Bssg
60-100+
Dark yellowish brown (10YR4/4) clay with few coarse sand grains; common fine faint gray mottles; moderate very fine and fine angular blocky structure; firm to friable, very sticky; many pressure cutan and common slickensides; few fine and medium iron/manganese nodules; slightly acid (field pH 6.5)