Page 181 - การศึกษาลักษณะและสมบัติของดินที่มีวัตถุต้นกำเนิดจากหินแกรนิตบริเวณจังหวัดอุทัยธานี
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2Btg5 130-150 Light brownish gray (10YR 6/2) loamy coarse sand; few
medium prominent yellowish brown (10YR 5/6) mottles;
weak fine subangular blocky structure; loose, nonsticky and
nonplastic; patchy thin argillan on ped face and in pore;
many coarse quartz and many fine feldspar; many fine
irregular pores; slightly acid (field pH 6.0); gradual, smooth
boundary to Btg7.
2Btg6 150-170 Mixed gray (10YR 6/1) 50% and light brownish gray (10YR 6/2)
50% coarse sandy loam; few medium prominent yellowish
brown (10YR 5/6) mottles; weak fine subangular blocky
structure; loose, nonsticky and nonplastic; patchy thin
argillan on ped face and in pore; many coarse quartz and
many fine feldspar; many fine irregular pores; strongly acid
(field pH 5.5).

