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ͪشԹ  :  ͧ  Rayong (Ry)
 
 
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A
0-10
Very dark gray (10YR3/1) sand; single grains and weak fine granular structure; loose, nonsticky and nonplastic; many fine interstitial pores; many very fine, fine and few coarse roots; very strongly acid (field pH 5.0); clear slightly wavy boundary.
C1
10-44
Pale brown to light yellowish brown (10YR6/3-4) sand; single grains and weak fine granular structure; loose, nonsticky and nonplastic; many fine interstitial pores; many very fine, fine and few medium roots; slightly acid (field pH 6.5); gradual smooth boundary.
C2
44-75
Pinkish gray (7.5YR7/2) sand; single grains and weak fine granular structure; loose, nonsticky and nonplastic; many fine interstitial pores; few fine roots; slightly acid (field pH 6.5); diffuse smooth boundary.
C3
75-140
Pinkish gray to pink (7.5YR7/2-3) sand; single grains and weak fine granular structure; loose, nonsticky and nonplastic; many very fine interstitial pores; slightly acid (field pH 6.5).