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ª×èͪÑé¹´Ô¹ |
¤ÇÒÁÅÖ¡(«Á.) |
¤Ó͸ԺÒªÑé¹´Ô¹ |
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A
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0-12/16
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Dark brown (7.5YR3/4); sandy loam; moderate fine subangular blocky structure; hard, firm, slightly sticky, slightly plastic; many fine roots; strongly acid (field pH 5.5); clear, smooth boundary. |
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AB
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12/16-28
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Strong brown (7.5YR4/6); sandy clay loam; moderate fine and medium subangular blocky structure; hard, firm, slightly sticky, slightly plastic; common fine roots; very strongly acid (field pH 5.0); clear, smooth boundary. |
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Bt1
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28-48
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Yellowish red (5YR5/6); clay loam; moderate medium and coarse subangular blocky breaking to moderate fine subangular blocky structure; hard, firm, sticky, plastic; patchy thin clay coating on ped faces and in pores; few biological activities of 1.9-4.0 cm. in diameter common fine roots; very strongly acid (field pH 5.0); gradual, smooth boundary. |
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Bt2
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48-77
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Yellowish red (5YR5/6); clay; moderate fine and medium subangular blocky structure; hard, firm, sticky, plastic; broken moderately thick clay coating on ped faces and in pores; few fine roots; very strongly acid (field pH 5.0); gradual, smooth boundary. |
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Bt3
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77-135
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Yellowish red (5YR5/8); clay; moderate fine and medium subangular blocky structure; firm, sticky, plastic; broken moderately thick clay coating on ped faces and in pores; few fine roots; few rounded and subrounded gravel about 0.5-2.0 cm. in diameter; very strongly acid (field pH 5.0); clear, smooth boundary. |
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Bt4
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135+
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Yellowish red (5YR5/8); very gravelly clay with 50% of subrounded, angular quartz and laterite gravels; moderate fine and medium subangular blocky structure; very firm, very sticky, very plastic; broken moderately thick clay coating on aggregate faces and continuous moderately thick clay coating in pores; very few fine roots; very strongly acid (field pH 4.5) |
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