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((silt + 1.5*clay) < 15) SAND ((silt + 1.5*clay >= 15) && (silt + 2*clay < 30)) LOAMY SAND ((clay >= 7 && clay < 20) && (sand > 52) && ((silt + 2*clay) >= 30) || (clay < 7 && silt < 50 && (silt+2*clay)>=30)) SANDY LOAM ((clay >= 7 && clay < 27) && (silt >= 28 && silt < 50) && (sand <= 52)) LOAM ((silt >= 50 && (clay >= 12 && clay < 27)) || ((silt >= 50 && silt < 80) && clay < 12)) SILT LOAM (silt >= 80 && clay < 12) SILT ((clay >= 20 && clay < 35) && (silt < 28) && (sand > 45)) SANDY CLAY LOAM ((clay >= 27 && clay < 40) && (sand > 20 && sand <= 45)) CLAY LOAM ((clay >= 27 && clay < 40) && (sand <= 20)) SILTY CLAY LOAM (clay >= 35 && sand > 45) SANDY CLAY (clay >= 40 && silt >= 40) SILTY CLAY (clay >= 40 && sand <= 45 && silt < 40) CLAY ÔõôÓÃconÓ﷨дÕâ¸ö³ÌÐò°¡£¬¼±Ç󣡣¡£¡£¡£¡£¡£¡ |
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