Page 181 - การศึกษาลักษณะและสมบัติของดินที่มีวัตถุต้นกำเนิดจากหินแกรนิตบริเวณจังหวัดอุทัยธานี
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ห้องสมุดกรมพัฒนาที่ดิน
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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).
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