Soils of Mouila Lot 3, Mouila Lot 3 Extension & Ndende Estates, Mougalaba, Douya Onoye & Dola Departments, Ngounie Province, Republic of Gabon
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Soils of Mouila Lot 3, Mouila Lot 3 Extension & Ndende Estates, Mougalaba, Douya Onoye & Dola Departments, Ngounie Province, Republic of Gabon
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SEMI-DETAILED SOIL MAP LEGEND
MOUILA LOT 3, MOUILA LOT 3 EXTENSION AND NDENDE ESTATES OLAM PALM GABON S.A.
Mougalaba, Douya Onoye & Dola Departments Ngounie Province
Republic of Gabon
Parent Material
Map Symbol
Soil Series
Slope
Class (%) Description
Mouila Lot 3 Estate
Mouila Lot 3 Estate Extension
Ndende Estate Total Extent
Ha % Ha % Ha % Ha %
Sedimentary rocks
Mlu/3 Malau Rolling
(12-24)
Deep (>100 cm) brownish yellow sandy loam. Weak to moderate medium subangular blocky; friable. Patchy clayskins (argillic). Well drained. Soils developed over sedimentary rocks.
15.1 0.1 - - - - 15.1 0.1
Kra/3 Kekura Rolling (12-24)
Shallow (<50 cm) yellow, fine sandy clay loam. Well drained. Weak medium and fine subangular blocky;
friable. Weathered sandstone fragments occur within 50 cm depth. Soils over sandstones.
- - 4.3 0.1 - - 4.3 -
Pediments-Reworked Petroplinthite -P
Mca/3
Malacca
Rolling (12-24)
Shallow (<50 cm) gravelly to stony clay. Yellowish red to red; weak medium subangular blocky; friable. Patchy clayskins (kandic). Stones consist of subangular petroplinthite gravels. Well drained. Soils developed over pediments (P) surface.
- - - - 15.1 0.2 15.1 0.1
Mca/2 Undulating
(4-12) - - - - 7.5 0.1 7.5 0.1
Gmi/3 Gajah Mati
Rolling (12-24)
Shallow (<50 cm) gravelly clay. Yellowish brown to strong brown; weak medium subangular blocky; friable.
Patchy clayskins. Stones consist of subangular petroplinthite gravels. Well drained. Soils developed over pediments (P) surface.
- - - - 22.6 0.3 22.6 0.1
Pediments-Reworked Petroplinthite -P3
Trp/3
Terap
Rolling (12-24)
Moderately deep (50-100 cm) yellowish brown to strong brown. Fine sandy clay to 70 cm over stony clay.
Moderate medium subangular blocky; friable. Patchy clayskins. Stones consist of subrounded petroplinthite (lateritic) gravels. Well drained. Soils over Pediments (P3).
- - - - 15.0 0.2 15.0 0.1
Trp/2 Undulating
(4-12) - - - - 22.7 0.3 22.7 0.1
Pdu/3
Pedu
Rolling (12-24)
Shallow (<50 cm) gravelly loam. Strong brown to brownish yellow; weak medium subangular blocky structures; friable. Patchy clayskins. Stones consist of subrounded petroplinthite gravels. Well drained. Soils developed over pediments (P3) surface.
102.3 0.7 - - 775.7 10.3 878.0 3.4
Pdu/2 Undulating
(4-12) 652.5 4.5 300.8 7.5 1,634.2 21.7 2,587.5 10.0
Pdu/fsl/3 Pedu/
fine sandy
loam
Rolling (12-24)
Shallow (<50 cm) gravelly fine sandy loam. Strong brown to brownish yellow; weak medium subangular blocky structures; friable. Patchy clayskins. Stones consist of subrounded petroplinthite gravels. Well drained. Soils developed over pediments (P3) surface.
- - 35.4 0.9 - - 35.4 0.1
Pdu/fsl/2 Undulating
(4-12) 2,668.2 18.4 76.0 1.9 - - 2,744.2 10.6
Nrg/3
Nerang
Rolling
(12-24) Moderately deep (50-100 cm) brownish yellow to strong brown fine sandy loam to over 50 cm overlying a dense thick (>25 cm) gravelly clay. Gravels consist of rounded and subrounded petroplinthic gravels. Weak medium to fine structure; friable; patchy clayskins. Within 100 cm soil is variegated. Moderately well drained soil on Pediment (P3) surfaces.
101.3 0.7 - - 165.6 2.2 266.9 1.0
Nrg/2 Undulating
(4-12) - - 874.2 21.8 2,838.6 37.7 3,712.8 14.4
Nrg/1 Level
(0-4) - - - - 22.6 0.3 22.6 0.1
Nrg/fsl/3
Nerang/
fine sandy
loam
Rolling (12-24)
Moderately deep (50-100 cm) brownish yellow to strong brown fine sandy loam to over 50 cm overlying a dense thick (>25 cm) gravelly clay. Gravels consist of rounded and subrounded petroplinthic gravels. Weak medium to fine structure; friable; patchy clayskins. Within 100 cm soil is variegated. Moderately well drained soil on Pediment (P3) surfaces.
- - 111.0 2.8 - - 111.0 0.4
Nrg/fsl/2 Undulating
(4-12) 5,797.9 40.0 630.1 15.7 - - 6,428.0 24.9
Pediments- Reworked Petroplinthite -P2
Dpr/2 Dampar Undulating (4-12)
Moderately deep (50-100 cm) brownish yellow to strong brown fine sandy clay loam to over 50 cm overlying a dense thick (>25 cm) gravelly clay. Gravels consist of rounded and subrounded petroplinthic gravels. Weak medium to fine structure; friable; patchy clayskins. Within 100 cm soil is variegated. Moderately well drained soil on Pediment (P2) surfaces.
- - - - 30.1 0.4 30.1 0.1
Sub-Recent Alluvium
Tbk/2 Tebok Undulating (4-12)
Deep (>100 cm) yellowish brown fine sandy clay.
Moderate medium subangular blocky; friable to firm.
Patchy clayskins (kandic). Well drained. Soils developed over Sub-Recent Alluvium.
- - 53.1 1.3 15.1 0.2 68.2 0.3
Rsu/2 Rasau Undulating (4-12)
Deep (>100 cm) yellowish brown fine sandy clay loam.
Moderate medium subangular blocky; friable. Patchy clayskins (kandic). Well drained. Soils developed over Sub-Recent Alluvium.
87.0 0.6 2.8 0.1 67.8 0.9 157.6 0.6
Nka/2
Nangka
Undulating
(4-12) Deep (>100 cm) yellow to pale yellow fine sandy loam.
Weak medium and fine subangular blocky; very friable.
No clayskins (cambic). Well to moderately well drained.
Soils developed over Sub-Recent Alluvium.
1,740.9 13.6 95.8 2.4 1,039.9 13.8 2,876.6 11.1
Nka/1 Level
(0-4) - - - - 135.6 1.8 135.6 0.5
Sri/2
Serai
Undulating
(4-12) Deep (>100 cm) white sands. Albic horizon.
Structureless, loose. Excessively drained. Soils developed on Sub-Recent Alluvium.
- - 1,820.3 45.5 489.5 6.5 2,309.8 9.0
Sri/1 Level
(0-4) 159.5 1.1 - - 233.4 3.1 392.9 1.5
Bnr/fsl/2
Banar/
fine sandy
loam
Undulating (4-12)
Deep (>100 cm) pale yellow to 50 cm and light gray below 50 cm fine sandy loam. Weak coarse subangular blocky;
friable. No clayskins (cambic horizon). Imperfectly drained. Soils developed over Sub-Recent Alluvium.
507.7 3.5 - - - - 507.7 2.0
Bso/2 Buso Undulating (4-12)
Shallow (<50 cm) dark brown to white sand overlying thick (>10 cm) strongly cemented hard pan (spodic) layer within 50 cm depth. Imperfectly drained. Seasonally flooded. Soils developed over Sub-Recent Terrace Alluvium.
2,435.8 16.8 - - - - 2,435.8 9.4
Total: 14,268.2 100.0 4,003.8 100.0 7,531.0 100.0 25,803.0 100.0
Soils of Mouila Lot 3, Mouila Lot 3 Extension & Ndende Estates, Mougalaba, Douya Onoye & Dola Departments, Ngounie Province, Republic of Gabon
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Soils of Mouila Lot 3, Mouila Lot 3 Extension & Ndende Estates, Mougalaba, Douya Onoye & Dola Departments, Ngounie Province, Republic of Gabon
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SOIL MANAGEMENT GROUPS MAP LEGEND
MOUILA LOT 3, MOUILA LOT 3 EXTENSION AND NDENDE ESTATES OLAM PALM GABON S.A.
Mougalaba, Douya Onoye & Dola Departments Ngounie Province
Republic of Gabon
Soil Management
Group
Soil Map Units
Main Characteristic/
Limitation
Management Practices
Needed
Peak Yield
Potential Mouila Lot 3 Estate Mouila Lot 3 Estate
Extension Ndende Estate Total Extent
mt/ha/yr Ha % Ha % Ha % Ha %
A
Trp/3 Trp/2 Tbk/2
Deep (>100 cm) to moderately deep (50-100 cm) fine sandy clay to clay (>35% clay) textured soils.
Low fertility.
Soil erosion monitoring and mitigation:
• cover crop establishment.
• terracing.
• frond stacking.
Good fertilizer programme.
28-32 - - 53.1 1.3 52.8 0.7 105.9 0.5
B Dpr/2
Rsu/2
Deep (>100 cm) to moderately deep (50-100 cm) well drained soils. Texture sandy clay loam (18- 35% clay). Moisture stress and yield fluctuations.
Low fertility.
Soil erosion monitoring and mitigation:
• cover crop establishment.
• terracing.
• frond stacking.
• EFB application.
Good fertilizer programme. Monitor K levels.
26-30 87.0 0.6 2.8 0.1 97.9 1.3 187.7 0.7
C Bnr/fsl/2
Deep (>100 cm), imperfect to poorly drained alluvial soils.
Textures clay to sandy clay to sandy clay loam.
Flooding and high water tables.
Low fertility status.
• Drainage and flood mitigation.
• Good fertilizer programme. 28-34 507.7 3.5 - - - - 507.7 2.0
D
Sri/2 Sri/1 Bso/2
Shallow (<50 cm) sandy (<10% clay) soils with albic and spodic horizons.
Excessively drained.
Moisture stress and yield fluctuation.
• EFB application.
• Frond stacking.
• Erosion monitoring and mitigation.
• Soil moisture conservation.
• Cover crop (Mucuna) establishment.
• Additional fertilizers (split). Break cemented pan.
18-24 2,595.3 17.9 1,820.3 45.5 722.9 9.6 5,138.5 19.9
F Kra/3
Shallow (<50 cm) soils with sandy clay to sandy clay loam texture. Moderately well drained.
Moisture stress and yield fluctuation. Wind damage. Soils often on steep slopes.
• EFB application.
• Frond stacking.
• Erosion monitoring and mitigation.
• Soil moisture conservation.
• Cover crop establishment.
• Fertilizers in holes
24-28 - - 4.3 0.1 - - 4.3 -
L
Mlu/3 Nrg/3 Nrg/2 Nrg/1 Nrg/fsl/3 Nrg/fsl/2 Nka/2 Nka/1
Deep (>100 cm) to moderately Deep (50-100 cm) sandy loam textured soils. Well drained. Moisture stress and yield fluctuations. Very low fertility.
Soil erosion monitoring and mitigation.
• Cover crop establishment.
• Terracing.
• Frond stacking.
• EFB application.
• Good fertilizer programme.
• Monitor K levels.
24-28 7,655.2 54.4 1,711.1 42.7 4,202.3 55.8 13,568.6 52.5
P
Mca/3 Mca/2 Gmi/3 Pdu/3 Pdu/2 Pdu/fsl/3 Pdu/fsl/2
Shallow (<50 cm) well drained soils. Gravelly sandy clay textures. Shallow soil depth. Dense lateritic/gravel layer (<50 cm).
Low fertility. Poor rooting.
Moisture stress. Wind damage.
Soil erosion monitoring and mitigation:
• cover crop/wind breaks establishment.
• terracing.
• frond stacking.
• EFB application.
• Moisture conservation.
Good fertilizer programme.
22-28 3,423.0 23.6 412.2 10.3 2,455.1 32.6 6,290.3 24.4
Total: 14,268.2 100.0 4003.8 100.0 7531.0 100.0 25,803.0 100.0