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โครงการรวบรวมและจัดทําวารสารอิเล็กทรอนิกส์ มหาวิทยาลัยเกษตรศาสตร์

Thai J. For. 34 (3) : 44-55 (2015) 51

Table 2 6RPH SK\VLFDO SURSHUWLHV LQ VRLO SUR¿OHV

Soil depth Bulk density Gravel Soil particle distribution (%)
Soil texture
(cm) (Mg m ) * (%) Sand Silt Clay
-3
0-5 0.45 VL 82.40 4.40 loamy sand
5-10 VL 7.97 78.40 17.20 4.40 loamy sand
10-20 VL 80.40 loamy sand
0.78 VL 27.00 sandy loam
0.90 VL sandy loam
1.01 L 8.89 21.00 sandy loam
1.11 L 52.40 18.00 sandy clay loam
80-100 ML 55.40 21.00 sandy clay loam
100-120 ML 51.40 27.00 sandy clay loam
120-140 ML 59.40 25.00 sandy loam
ML 22.00 sandy loam
1.28 ML 2.52 18.00 sandy loam
180-200 ML 18.00 sandy clay loam
Notes: VL = very low, L = low, ML = moderately low, M = medium, MH = moderately high

Table 3 Chemical properties RI S+ 20 2& 1 & 1 DQG 3 LQ VRLO SUR¿OHV

Depth OM OC Total N C/N Available P
(cm) pH % * % * % * Ratio (mg kg ) *
-1
0-5 5.05 strongly acid + VH VH 0.50 H 8.74 22.80 MH
5-10 strongly acid + VH VH M 11.77 2.80 VL
10-20 5.10 strongly acid 4.24+0.40 H H 0.22 M 11.18 2.79 VL
strongly acid 2.12+0.27 H VL 0.11 L 1.20 VL
5.42 strongly acid 1.95+0.25 M VL 0.08 VL 1.10 VL
5.24 strongly acid +0.25 M L 0.01 VL 1.20 VL
strongly acid 0.47+ VL 0.27 VL 0.01 VL 1.20 VL
80-100 strongly acid 0.44+0.22 VL VL 0.01 VL 25.52 1.00 VL
100-120 strongly acid 0.48+0.24 VL 0.28 VL 0.01 VL 27.84 0.92 VL
120-140 strongly acid 0.28+0.21 VL VL 0.01 VL 0.80 VL
strongly acid 0.18+0.05 VL 0.10 VL 0.01 VL 10.44 0.79 VL
5.29 strongly acid 0.14+0.10 VL 0.08 VL 0.01 VL 8.12 0.77 VL
180-200 strongly acid 0.12+0.12 VL 0.07 VL 0.01 VL VL
Notes: VL = very low, L = low, ML = moderately low, M = medium, MH = moderately high, H = high, VH = very high
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