[en] Landscape Ecological Survey of the Bipindi-Akom II ... - ITTO

PROFILE PROFILE 137 137
Legend Legend unit: unit:
Soil Soil classification:
classification:
Description:
Description:
Location: Location:
Elevation: Elevation:
Landform Landform and and slope: slope:
Parent Parent material: material:
Vegetation: Vegetation:
Drainage: Drainage:
Soil: Soil:
Depth Depth (cm) (cm) Hor. Hor.
0- 0- 6 6 Ah Ah
6- 6- 22 22 BA BA
IV IV 22- 22- 74 74 Bwsl Bwsl
VI VI
74-127 74-127 Bws2 Bws2
127-170 127-170 Bvl Bvl
170-200 170-200 Bv2 Bv2
DuI DuI
Ferrali Ferrali ferric ferric Acrisol Acrisol (FAO) (FAO)
Typic Typic Kandiudult Kandiudult (Soil (Soil Taxonomy) Taxonomy)
On On 26-06-95 26-06-95 by by Gerard Gerard Hazeu Hazeu
About About 2 2 km km NW NW ofToko ofToko village; village; 2°57'28 2°57'28 Nand Nand 10°29'02 10°29'02 E E
II0m II0m
Undulating Undulating to to rolling rolling uplands; uplands; middle middle slope slope 5 5 -- 10% 10%
Gneisses Gneisses of of the the Precambrian Precambrian shield shield
Forest Forest
Moderately Moderately well well drained drained
Vel)' Vel)' deep, deep, yellowish yellowish brown brown sandy sandy clay clay to to clay clay with with loamy loamy sand sand to to sandy sandy loam loam topsoil topsoil
Description
Description
dark dark yellowish yellowish brown brown (I (I OYR4/4); OYR4/4); loamy loamy sand sand to to sandy sandy loam; loam; weak weak vel)' vel)' fine fine granular granular
and and weakly weakly coherent coherent slructure; slructure; loose loose 10 10 vel)' vel)' friable, friable, non non slicky slicky and and slighlly slighlly plastic; plastic;
common, common, vel)' vel)' fine fine 10 10 fine fine roots; roots; clear clear and and smooth smooth Iransition Iransition to to
yellowish yellowish brown brown (IOYR5/6); (IOYR5/6); sandy sandy clay clay loam; loam; weak weak to to moderate, moderate, vel)' vel)' fine fine 10 10 fine fine
subangular subangular bloc).:y; bloc).:y; friable, friable, slighlly slighlly slicky slicky and and slighlly slighlly plastic; plastic; few few 10 10 common, common, fine fine to to
coarse coarse rools; rools; gradual gradual and and smoolh smoolh Iransilion Iransilion 10 10
yellowish yellowish brown brown (IOYR518); (IOYR518); sandy sandy clay clay loam; loam; few few (10%) (10%) fine fine faint faint diffuse diffuse 7.5YR518 7.5YR518
mOllles; mOllles; weak weak to to moderate, moderate, vel)' vel)' fine fine to to fine fine subangular subangular blocky; blocky; friable, friable, slighlly slighlly sticky sticky
and and slightly slightly plastic; plastic; few few to to many, many, fine fine to to medium medium roots; roots; gradual gradual and and smooth smooth transition transition
to to
yellowish yellowish brown brown (IOYR5/8); (IOYR5/8); vel)' vel)' gravelly, gravelly, stony stony sandy sandy clay clay loam; loam; few few (15%) (15%) fine fine faint faint
diffuse diffuse 7.5YR5/8 7.5YR5/8 monIes; monIes; few few to to frequenl, frequenl, small small to to large, large, soft soft 10 10 hard, hard, irregular irregular to to
spherical spherical iron iron concretions; concretions; weak weak to to moderate, moderate, vel)' vel)' fine fine to to fine fine subangular subangular blocky; blocky;
friable, friable, slightly slightly sticky sticky and and slightly slightly plastic; plastic; few, few, vel)' vel)' fine fine to to fine fine roots; roots; gradual gradual and and
smooth smooth transition transition to to
yellowish yellowish brown brown (I (I OYR518); OYR518); slightly slightly gravelly gravelly clay clay loam; loam; many many (20%) (20%) medium medium
prominenl prominenl clear clear 5YR5/8 5YR5/8 monIes; monIes; vel)' vel)' few few 10 10 few, few, small small soft soft to to hard, hard, spherical spherical iron iron
concretions; concretions; weak weak fine fine subangular subangular blocky; blocky; friable, friable, slightly slightly slicky slicky and and slightly slightly plastic; plastic;
vel)' vel)' few few vel)' vel)' fine fine 10 10 fine fine roots; roots; gradual gradual and and smooth smooth transition transition to to
yellowish yellowish brown brown (IOYRS/8); (IOYRS/8); gravelly gravelly clay clay loam; loam; many many (35%) (35%) medium medium prominent prominent clear clear
2.5YR4/8 2.5YR4/8 monIes; monIes; vel)' vel)' few few to to frequent, frequent, small small soft soft to to hard, hard, irregular irregular to to spherical spherical iron iron
concretions; concretions; weak weak fine fine subangular subangular blocky; blocky; friable, friable, slightly slightly sticky sticky and and slighlly slighlly plastic; plastic;
no no roots. roots.
Horizon Horizon
Ah Ah
BA BA
Bwsl Bwsl
Bws2 Bws2
Bvl Bvl
Bv2 Bv2
Horizon Horizon
Ah Ah
BA BA
Bwsl Bwsl
Bws2 Bws2
Bvl Bvl
Bv2 Bv2
Horizon Horizon
Ah Ah
BA BA
Bwsl Bwsl
Bws2 Bws2
Bvl Bvl
Bv2 Bv2
Profile Profile 137 137
Particle Particle size size distribulion distribulion
Deplh Deplh (cm) (cm) % % of of fine fine earth; earth; in in !lm !lm
pH pH