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ª×èͪÑé¹´Ô¹ |
¤ÇÒÁÅÖ¡(«Á.) |
¤Ó͸ԺÒªÑé¹´Ô¹ |
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Ap
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0-15/17
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Dark brown (7.5YR3/2) clay loam, yellowish brown (10YR5/4) with strong brown (7.5YR5/6) patches when dry; moderate medium and fine subangular blocky in the upper part of the horizon and weak coarse subangular blocky structure in the lower part of the horizon; hard, very firm, sticky, plastic; very few fine hard, spherical ironstone nodules; few pieces of charcoal; many very fine and fine roots; moderately acid (field pH 6.0); abrupt, wavy boundary. |
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Bt1
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15/17-65
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Reddish brown to dark brown (5YR-7.5YR4/4) clay; moderate medium and fine subangular blocky structure; friable to firm, sticky, plastic; patchy thin cutans on ped faces, continuous thin cutans in few vesicular pores; common fine, hard, spherical ironstone nodules and weathered rocked fragments, very few of the rock fragments are stone size; many very fine and fine roots; mainly in the top 14 cm of this horizon; very strongly acid (field pH 5.5); gradual, smooth boundary. |
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Bt2
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65-96
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Yellowish red (5YR4/8) clay; moderate medium and fine subangular blocky structure; friable, sticky, slightly plastic; patchy thin and continuous moderately thick cutans in vesicular pores; very few fine gravel of weathered rock fragments, few very fine and fine roots; strongly acid (field pH 5.5); gradual, smooth boundary. |
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Bw
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96-130+
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Strong brown (7.5YR5/6) clay; moderate medium and fine subangular blocky structure; firm, sticky, slightly plastic; few subangular and subrounded quartz grains, and weathered rock fragments, few very fine black manganese nodules; few fine roots; strongly acid (field pH 5.5). |
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