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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
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