Semi-detailed Soil Survey of the LIuidas Vale Area, St. Catherine-St ...

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THE SOILS Union Hill variant 1 soils are deep, well drained, dark (greyish) brown to strong brown and yellowish brown and fine textured. They occur in the same areas as Union Hill soils, but on less steep slopes. Consequently the soils are deeper and have a higher organic matter content in the topsoil. The structure is moderately well developed; very slightly developed vertic properties are found. The soils have a low CEC and inherent fertility. P-fixation seems a problem like in the St. Ann variant I soils. The AWC is moderate, and the soils have a high permeability, thus making them susceptible to drought. Mount Rosser soils are shallow, well drained and dark greyish brown to strong brown. The texture is fine, with limestone gravels and stones. The soils occur on the steep to very steep slopes over soft and rubbly limestone, associated with the Mount Diablo Inlier. The soil structure is not very well developed. The organic carbon content is high. The inherent fertility of these calcareous soils is high, while the mineralogy is mixed. The AWC is low and the soils are highly permeable and susceptible to drought. Carron Hall soils are described in the Linstead-Bog Walk survey report (SSU 1987b) as follows: moderately deep, well drained, brown, cracking clay over a yellowish brown to brownish yellow subsoil. Carron Hall soils occur mainly in areas bordering the soft limestone outcrops surrounding the Central Inlier. These highly calcareous soils are of montmorillonitic mineralogy and show marked swell-shrink properties. The inherent fertility and base-saturation are high. The AWC is low. During the Watermount Survey (toposheets 85A and 85C) the characteristics of these soils will be further defined. 4.4.2 Soils of the Inland. Basins Two Inland Basins are recognized in the survey area, i.e. the Lluidas Vale basin and the north-western "fringes" of the Linstead basin. Soils mapped in the Old Alluvial deposits of the Lluidas Vale basin are Pennants variant I, Tydixon, Knollis and Brysons variant I and II, related to different depositand erosion levels. They have high exchangeable magnesium contents, a low AWC and are typically mottled in the subsoil resembling "corned beef" (see Section 4.5.1). They all have an almost flat to gently sloping topography; the Pennants variant I soils partially are more dissected by gullies to a rolling topography. The Lluidas Vale basin lies in the wetter part of the Intermediate Moisture Availability Zone (MAZ, SSU 1989i); the soil moisture regime is udic. In the Linstead basin Linstead variant I, Rosemere variant I and Riverhead soils are found in Old Alluvial deposits. These soils occur on the boundary of the dryer and wetter part of the Intermediate MAZ; soil moisture regime is 41
THE SOILS ustic to udic. In the soil classification, the moisture regime is indicated as udic. In addition to the Old Alluvial deposits, some rolling fluvio-colluvial deposits are found in the south-eastern part of the Lluidas Vale basin, on which the Donnington variant II soils have developed. Pennants variant I soils are deep, imperfectly drained, reddish and yellowish brown, and moderately textured, over a red-light grey mottled, very acid, fine textured subsoil. The textural change between the surface layers and the subsoil is abrupt. The soils occur on the (gently) undulating, northern terrace of the Lluidas Vale Basin; the terrace is dissected by gullies. The structure of the soil is well developed; in places slight cracking of the topsoil is observed. The organic matter content is high, but not high enough for a mollic epipedon. The mineralogy is mixed and the ECEC is moderate to high; up to 90% of the exchange complex is occupied by aluminium. The AWC is low, as is the permeability. The subsoil is droughty. Pennants variant I soils differ from Pennants soils (SSU 1987b) in that they show less prominent vertic properties and they are not neutral. Tydixon soils are deep and poorly drained. The topsoil is greyish and the subsoil is grey, yellowish brown and slightly reddish mottled. The soils show an abrupt textural change from the moderately coarse textured topsoil, including an albic horizon, to the fine textured subsoil. Tydixon soils occur at similar elevations as Pennants variant I soils, while Knollis soils (described below) occupy^omewhat higher positions in the landscape. The soil structure is moderately well developed. The topsoil has a very low organic matter content and a very low ECEC; the ECEC of the subsoil is moderate, while the exchange complex is largely occupied by aluminium. The permeability of Tydixon soils is low in the subsoil and the AWC is low throughout. Knollis soils resemble Pennants variant I soils, but they occur on a somewhat more elevated, almost flat, terrace. The soils are deep and imperfectly to poorly drained. The topsoil is very dark grey(-ish brown) and the subsoil is mixed strong brown, yellowish brown and red, light grey mottled. The mottling becomes more pronounced with increasing depth. The soil is fine textured throughout and the structure is moderately well to well developed. There is a high organic matter content in the topsoil. The soil mineralogy is mixed; the subsoil is acid. The AWC is low, as is the permeability. Knollis soils are susceptible to drought. 42
Page 1 and 2: Soil Survey Report No. 7 Semi-detai
Page 3 and 4: PREFACE This report is the seventh
Page 5 and 6: drainage, poor workability). The ar
Page 7 and 8: II 4.5 Description of the soil mapp
Page 9 and 10: Ll I II II
Page 11 and 12: INTRODUCTION cover. Field work prep
Page 13 and 14: DESCRIPTION OF THE SURVEY AREA plan
Page 15 and 16: DESCRIPTION OF THE SURVEY AREA The
Page 17 and 18: DESCRIPTION OF THE SURVEY AREA Tabl
Page 19 and 20: DESCRIPTION OF THE SURVEY AREA Sinc
Page 21 and 22: 2.2.5 Wind DESCRIPTION OF THE SURVE
Page 23 and 24: Mapping Unit* K- M. abov* mil 600 0
Page 25 and 26: DESCRIPTION OF THE SURVEY AREA The
Page 27 and 28: DESCRIPTION OF THE SURVEY AREA Lege
Page 29 and 30: DESCRIPTION OF THE SURVEY AREA Floo
Page 31 and 32: DESCRIPTION OF THE SURVEY AREA but
Page 33 and 34: DESCRIPTION OF THE SURVEY AREA Lege
Page 35 and 36: 3. MATERIALS AND METHODS 3.1 OFFICE
Page 37 and 38: MATERIALS AND METHODS profile to se
Page 39 and 40: MATERIALS AND METHODS Total N: (acc
Page 41 and 42: 4. IHE^QILS 4.1 PREVIOUS WORK THE S
Page 43 and 44: THE SOILS Oxisols are very strongly
Page 45 and 46: THE SOILS -ults stands for the orde
Page 47 and 48: THE SOILS even at a larger scale of
Page 49: THE SOILS Bonnveate soils are very
Page 53 and 54: THE SOILS Brvsons variant I and Brv
Page 55 and 56: THE SOILS Table 12. Summarized over
Page 57 and 58: Series name Depth of soil Drainage
Page 59 and 60: o Series name Depth of soil Drainag
Page 61 and 62: THE SOILS - Soil series to be recog
Page 63 and 64: THE SOILS Present land use: The soi
Page 65 and 66: THE SOILS isohyperthermic family of
Page 67 and 68: THE SOILS Both soils occur on moder
Page 69 and 70: THE SOILS Inclusions: South of the
Page 71 and 72: THE SOILS boundary of the Mount Dia
Page 73 and 74: THE SOILS Brief profile description
Page 75 and 76: THE SOILS occur in the north-wester
Page 79 and 80: THE SOILS concretions are found. Cl
Page 83 and 84: THE SOILS PR2 Rose Hall clay loam -
Page 85 and 86: THE SOILS Present land use: Both Ll
Page 87 and 88: AGRONOMIC INTERPRETATION OF SURVEY
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AGRONOMIC INTERPRETATION OF SURVEY
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0 H- Ul in > • flj -J in u •rl
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S o z o 3 L 0 4- ul in +> •i-t r
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< a > PC 3 u. o z o < at a Z 5 O z
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Crop slope (7.) co-f-fee (cane. ) b
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• • L 0 4- in i/i m a i • 1 n
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-i O -H •- 0) >-• cr 3 n n o a
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a >• u > oc u. o 2 o < 3 2 s o 2
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6. REFERENCES REFERENCES Barker, G.
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REFERENCES Soil Survey Project/Unit
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REFERENCES SSU 1989L Agro-climatic
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GLOSSARY Colluvium: Soil material,
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GLOSSARY C horizon: The mineral hor
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GLOSSARY Relief: The collectively c
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APPENDICES APPENDIX I Agro-climatic
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CORN GROUND APPENDICES Table 1 : Ex
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GRASS PIECE APPENDICES Table 1 : Ex
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SWANSEA APPENDICES Table 1 : Extrem
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APPENDICES Rainfall statistics for
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APPENDICES Table 1 : Analysis o-f s
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APPENDICES APPENDIX III Land use in
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APPENDICES FRUITS pawpaw 7.75 pinea
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APPENDICES Profile no. 89/84C/001 M
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APPENDICES Profile no. 8S/84C/O03 M
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APPENDICES Profile no. 86/B4C/010 M
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APPENDICES Profile no. 89/84A/046 M
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APPENDICES Profile no. 89/84/067 Ma
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APPENDICES Profile no. 88/84C/108 h
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APPENDICES Profile. 88/84C/1C9 nap
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89/84A/046 cont: APPENDICES Cg3 112
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APPENDICES APPENDIX VI Correlation
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APPENDICES yellowish brown to yello
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APPENDICES P: SOILS OF THE RIVER PL
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APPENDICES KEY TO TRXTURAL GROUPS:
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Explanation of the tables: APPENDIC
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APPENDICES Table 2. Agro-ecological
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APPENDICES Table 10. Agro-ecologica
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APPENDICES APPENDIX IX Recommended
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APPENDICES Survey area: Lluidas Val
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-B°OO'N PARISH OF CLARENDON LEGEND
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Semi-detailed Soil Survey of the LIuidas Vale Area, St. Catherine-St ...

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