Table 2.15 Research sites in Yen Chau district, showing parent materials, relief positions and
relief characteristics, plus soil types and duration (in years) of recent land use
Site relief position
Inclination (%)/
ESL (m)/Slope
form (Y, X)
WRB soil type
Duration of cultivation, recent
land use (duration of recent land
use, years)
Study sites – parent material
Ban Dan – Limestone (BD-L)
Upper slope
48/0/s, s
Cutanic Alisol
(Chromic)
Primary forest
Upper slope
48/18/s, s
Cutanic Alisol
16, Maize (16)
Ban Dan -Clay shale (BD-C)
Upper slope
8/0/s, s
Cutanic Luvisol
Primary forest
Upper slope
47/10/s, s
Cutanic Luvisol
5, Maize (5)
Mid-slope
44/50/c, s
Cutanic Alisol
41, Maize (41)
Na Khkhang –Marl (NK-M)
Mid-slope
43/0/s, s
Vertisol
Primary forest
Mid-slope
27/50/s, s
Vertisol
7, Maize (7)
Mid-slope
45/57/s, s
Vertisol
18, Maize (18)
Muong Lum Clay shale (ML-C)
Mid-slope
58/0/s, s
Cutanic Alisol
Old secondary forest
Mid-slope
45/20/v, s
Cutanic Alisol
Gras fallow
Mid-slope
49/30/v, s
Cutanic Alisol
14 cassava (14)
Mid-slope
51/30/s, s
Cutanic Alisol
20 Maize (9)
Muong Lum Lime (ML-L)
Mid-slope
45/0/v, s
Cutanic Luvisol
(Chromic)
Primary forest
Lower slope
65/0/s, s
Luvic Phaeozem
n.i. Bush fallow
Foot slope
38/30/v, s
Cutanic Alisol
31, Maize (7)
Chieng Khoi – clastic sediments (CK-S)
Catena 1
Hill top (1 T)
2/16/v, v
Haplic Cambisol
(Calcaric)
28, cassava + teak (1)
Upper slope (1 uS)
22/13/v, s
Cutanic Luvisol
(Ferric)
28, cassava + maize (8)
Mid-slope (1 mS)
37/37/s, v
Cutanic Alisol
(Ferric)
25, cassava (22)
Lower slope (1 lS)
18/117/s, v
Cutanic Alisol
(Ferric)
30, cassava (3).
Toe slope (1TS-HG) 8/182/s, s
Hortic Anthrosol
(Eutric)
26, home garden (22)
Toe slope (1TS-M)
10/186/v, v
Cutanic Alisol
(Ferric)
30, mango orchard (30)
Study sites – parent material
Catena 2
Hill top (2 T)
0/4/v, s
Cambic Leptosol
(Dystric)
>57, fallow (57)
Upper slope (2 uS)
26/20/v, s
Cutanic Alisol
(Chromic)
>57, fallow (57)
Mid-slope (2 mS-1)
58/60/s, s
Cutanic Alisol
(Chromic)
23, cassava + teak + pinus (11)
(continued)
92
K. Stahr et al.
relief characteristics, plus soil types and duration (in years) of recent land use
Site relief position
Inclination (%)/
ESL (m)/Slope
form (Y, X)
WRB soil type
Duration of cultivation, recent
land use (duration of recent land
use, years)
Study sites – parent material
Ban Dan – Limestone (BD-L)
Upper slope
48/0/s, s
Cutanic Alisol
(Chromic)
Primary forest
Upper slope
48/18/s, s
Cutanic Alisol
16, Maize (16)
Ban Dan -Clay shale (BD-C)
Upper slope
8/0/s, s
Cutanic Luvisol
Primary forest
Upper slope
47/10/s, s
Cutanic Luvisol
5, Maize (5)
Mid-slope
44/50/c, s
Cutanic Alisol
41, Maize (41)
Na Khkhang –Marl (NK-M)
Mid-slope
43/0/s, s
Vertisol
Primary forest
Mid-slope
27/50/s, s
Vertisol
7, Maize (7)
Mid-slope
45/57/s, s
Vertisol
18, Maize (18)
Muong Lum Clay shale (ML-C)
Mid-slope
58/0/s, s
Cutanic Alisol
Old secondary forest
Mid-slope
45/20/v, s
Cutanic Alisol
Gras fallow
Mid-slope
49/30/v, s
Cutanic Alisol
14 cassava (14)
Mid-slope
51/30/s, s
Cutanic Alisol
20 Maize (9)
Muong Lum Lime (ML-L)
Mid-slope
45/0/v, s
Cutanic Luvisol
(Chromic)
Primary forest
Lower slope
65/0/s, s
Luvic Phaeozem
n.i. Bush fallow
Foot slope
38/30/v, s
Cutanic Alisol
31, Maize (7)
Chieng Khoi – clastic sediments (CK-S)
Catena 1
Hill top (1 T)
2/16/v, v
Haplic Cambisol
(Calcaric)
28, cassava + teak (1)
Upper slope (1 uS)
22/13/v, s
Cutanic Luvisol
(Ferric)
28, cassava + maize (8)
Mid-slope (1 mS)
37/37/s, v
Cutanic Alisol
(Ferric)
25, cassava (22)
Lower slope (1 lS)
18/117/s, v
Cutanic Alisol
(Ferric)
30, cassava (3).
Toe slope (1TS-HG) 8/182/s, s
Hortic Anthrosol
(Eutric)
26, home garden (22)
Toe slope (1TS-M)
10/186/v, v
Cutanic Alisol
(Ferric)
30, mango orchard (30)
Study sites – parent material
Catena 2
Hill top (2 T)
0/4/v, s
Cambic Leptosol
(Dystric)
>57, fallow (57)
Upper slope (2 uS)
26/20/v, s
Cutanic Alisol
(Chromic)
>57, fallow (57)
Mid-slope (2 mS-1)
58/60/s, s
Cutanic Alisol
(Chromic)
23, cassava + teak + pinus (11)
(continued)
92
K. Stahr et al.