Page 176 - การศึกษาลักษณะและสมบัติของดินที่มีวัตถุต้นกำเนิดจากหินแกรนิตบริเวณจังหวัดอุทัยธานี
P. 176
ห้องสมุดกรมพัฒนาที่ดิน
138
BA 12-38 Brown (7.5YR 4/3); sandy loam; moderate medium
subangular blocky structure; soft, very friable, non sticky
and non plastic; many very fine to fine interstitial pores;
many fine roots; moderately acid (field pH 6.0); clear,
smooth boundary to Bt1.
Bt1 38-70 Brown (7.5YR 4/4); sandy loam; moderate medium
subangular blocky structure; soft, very friable, non sticky
and non plastic; patchy thin argillan ped face and in
pore; few medium vesicular pores; few very fine roots;
strongly acid (field pH 5.5); clear, smooth boundary to
Bt2.
Bt2 70-100 Strong brown (7.5YR 4/6); slightly gravelly sandy loam;
moderate medium subangular blocky structure; soft,
very friable, non sticky and non plastic; patchy thin
argillan ped face and in pore; few coarse vesicular pores;
few very fine roots; few fine rock fragment from granite;
strongly acid (field pH 5.5); clear, smooth boundary to
Bt3.
Bt3 100- Strong brown (7.5YR 4/6); slightly gravelly sandy loam;
135/140 moderate medium subangular blocky structure; soft,
very friable, non sticky and non plastic; patchy thin
argillan ped face and in pore; few coarse vesicular pores;
few fine rock fragment from granite; strongly acid (field
pH 5.5); clear, wavy boundary to Bt4.
Bt4 135/140- Mixed strong brown (7.5YR 4/6) 80% and yellowish red
170 (5YR 5/8) 20%; gravelly coarse sandy loam; moderate
medium subangular blocky structure; soft, very friable,
non sticky and non plastic; patchy thin argillan ped face
and in pore; few fine irregular pores; common fine rock
fragment from granite; strongly acid (field pH 5.5); clear,
smooth boundary to BCr.
BCr 170-200 Mixed strong brown (7.5YR 5/6) 80% and yellowish red
(5YR 5/8) 20%; gravelly coarse sandy loam; moderate
medium subangular blocky structure; soft, very friable,
non sticky and non plastic; few fine irregular pores;
common fine rock fragment from granite; strongly acid
(field pH 5.5)

