Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa
Bibliography: leaves 71-78.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Geological Sciences
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613184948436992 |
|---|---|
| access_status_str | Open Access |
| author | Sugarman, David R |
| author2 | Fey, Martin V |
| author_browse | Fey, Martin V Sugarman, David R |
| author_facet | Fey, Martin V Sugarman, David R |
| author_sort | Sugarman, David R |
| collection | Thesis |
| description | Bibliography: leaves 71-78. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9880 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:07.214Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Geological Sciences |
| publisherStr | Department of Geological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9880 Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa Sugarman, David R Fey, Martin V Environmental Geochemistry Bibliography: leaves 71-78. It is widely accepted that afforestation adversely affects soil chemical properties. A significant decrease in pH, base cation status and acid neutralising capacity (ANC), coupled with increasing acidity have been observed to occur in acid coniferous forest soils both in the Northern and Southern Hemispheres. International and local studies in Southern Africa have observed declining productivity over successive rotations in pine plantations. Increasing acidity loads in the Northern Hemisphere and their adverse effects on forest health have generated a search for chemical indices that would assist in pursuing thresholds beyond which forest vitality is damaged. A common and widely used chemical index is the Ca/Al ratio. The most common parameter adopted is the Ca/Al molar ratio in soil solutions. Recent studies in Southern Africa (Swaziland. Kwazulu-Natal) and in the Sabie area (Eastern Escarpment) have indicated that some forest compartments (Pinus sp.) may experience Ca/Al molar ratios dropping below unity. The value of unity is widely used and proposed as a threshold beyond which tree vitality may be adversely affected. This study was conducted to determine the state of surface (0-20cm) soils underlying pine plantations of different ages in the Sabie area on the Eastern Escarpment of Southern Africa. The pine plantations were selected in areas overlying a uniform bedrock (shale), high attitude, high rainfall, north facing aspect and confined to 3 pine species (P. elliottii, P. patuia and P. taeda). A composite sample was taken from each of 22 forest compartments varying in age (between 22 and 67 years) and rotation (first, second and third). In addition, the results of previous investigations of forest soils in the Eastern Escarpment region were considered in order to expand the array of forest compartment ages and the size of the overall data set used for statistical analysis, so that comparisons could be made. 2014-12-03T03:31:12Z 2014-12-03T03:31:12Z 1999 Master Thesis Masters MSc http://hdl.handle.net/11427/9880 eng application/pdf Department of Geological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Environmental Geochemistry Sugarman, David R Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| thesis_degree_str | Master's |
| title | Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| title_full | Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| title_fullStr | Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| title_full_unstemmed | Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| title_short | Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa |
| title_sort | soil chemical properties in pine plantations of different ages in the eastern escarpement region of south africa |
| topic | Environmental Geochemistry |
| url | http://hdl.handle.net/11427/9880 |
| work_keys_str_mv | AT sugarmandavidr soilchemicalpropertiesinpineplantationsofdifferentagesintheeasternescarpementregionofsouthafrica |