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

PROFILE PROFILE ISO ISO
Legend Legend unit: unit: Dpd Dpd
Soil Soil classification: classification: Acri-plinthic Acri-plinthic Ferralsol Ferralsol (FAO) (FAO)
Plinthudult Plinthudult (Soil (Soil Taxonomy) Taxonomy)
Description:
Description:
On On 11-07-95 11-07-95 by by Gerard Gerard Ilazeu Ilazeu
Location: Location:
About About 300 300 m m NE NE of of Melen Melen village; village; 3 3 °02'80 °02'80 Nand Nand 10°31'64 10°31'64 E E
Elevation: Elevation:
Landfarm Landfarm and and slupe: slupe: Undulating Undulating dissech:d dissech:d erosional erosional plain; plain; lower lower slope slope 0 0 -- 5% 5%
Parent Parent material: material: Gneisses Gneisses and/or and/or migmatites migmatites of of the the Precambrian Precambrian shield shield
Vegetation: Vegetation:
Cacao Cacao plantation plantation
Drainage: Drainage:
Moderately Moderately well well drained drained
Soil: Soil:
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
Depth Depth (cm) (cm)
0- 0- 6 6
6- 6- 17 17
17- 17- 48 48
48- 48- 78 78
78-160 78-160
Hor. Hor.
120m 120m
Description Description
Ah Ah dark dark greyish greyish brown brown (lOYR4/1); (lOYR4/1); loamy loamy sand; sand; weakly weakly coherent coherent single single grain; grain;
loose, loose, loose, loose, non non sticky sticky and and non non plastic; plastic; very very few few to to few, few, fine fine to to medium medium
roots; roots; abrupt abrupt and and smooth smooth transition transition to to
BA BA very very pale pale brown brown (IOYR8/3); (IOYR8/3); slightly slightly gravelly gravelly loamy loamy sand sand to to sandy sandy loam; loam;
moderately moderately coherent coherent single single grain grain and and porous porous massive; massive; loose, loose, loose, loose, non non
sticky sticky and and non non plastic; plastic; few few very very fine fine to to fine fine roots; roots; clear clear and and smooth smooth
transition transition to to
Bws Bws yellow yellow (lOYR7/8); (lOYR7/8); very very gravelly gravelly sandy sandy clay; clay; many many (20%) (20%) fine fine faint faint diffuse diffuse
5YR5/8 5YR5/8 mottles; mottles; few few small small hard hard spherical spherical iron iron concretions; concretions; weak weak fine fine
subangular subangular blocky blocky and and strongly strongly coherent coherent porous porous massive; massive; friable, friable, slightly slightly
sticky sticky and and slightly slightly plastic; plastic; very very few few very very fine fine to to fine fine roots; roots; gradual gradual and and
smooth smooth transition transition to to
Bv Bv I I yellow yellow (I (I OYR OYR 7/6); 7/6); very very gravelly gravelly clay; clay; many many (20%) (20%) medium medium distinct distinct diffuse diffuse
2.5YR4/8 2.5YR4/8 mottles; mottles; very very few few to to frequent, frequent, small small to to large, large, soft soft to to hard, hard,
irregular irregular to to spherical spherical iron iron concretions; concretions; weak weak very very fine fine to to fine fine subangular subangular
blocky; blocky; friable, friable, slightly slightly sticky sticky and and slightly slightly plastic; plastic; very very few few fine fine roots; roots;
diffuse diffuse and and smooth smooth transition transition to to
Bv2 Bv2 light light yellowish yellowish brown brown (IOYR6/4); (IOYR6/4); gravelly gravelly clay; clay; many many (20%) (20%) medium medium
prominent prominent diffuse diffuse 2.5YR4/8 2.5YR4/8 mottles; mottles; few few to to frequent, frequent, small small to to large, large, soft soft
to to hard, hard, irregular irregular to to spherical spherical iron iron concretions; concretions; weak weak very very fine fine to to fine fine
subangular subangular blocky; blocky; friable, friable, slightly slightly sticky sticky and and slightly slightly plastic; plastic; very very few few
fine fine roots. roots.
Horizon Horizon
Ah Ah
BA BA
Bws Bws
Bvl Bvl
Bv2 Bv2
Bv2 Bv2
Horizon Horizon
Ah Ah
BA BA
Bws Bws
Bvl Bvl
Bv2 Bv2
Bv2 Bv2
Horizon Horizon
Ah Ah
BA BA
Bws Bws
Bvl Bvl
Bv2 Bv2
Bv2 Bv2
Profile Profile 150 150
Particle Particle size size distribution distribution
Depth Depth (cm) (cm) % % of of fine fine earth; earth; inllm inllm
pH pH