Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa

 

Show simple item record

dc.contributor.advisor Fey, Martin V en_ZA
dc.contributor.author Sugarman, David R en_ZA
dc.date.accessioned 2014-12-03T03:31:12Z
dc.date.available 2014-12-03T03:31:12Z
dc.date.issued 1999 en_ZA
dc.identifier.citation Sugarman, D. 1999. Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/9880
dc.description Bibliography: leaves 71-78. en_ZA
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Environmental Geochemistry en_ZA
dc.title Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Geological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Sugarman, D. R. (1999). <i>Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/9880 en_ZA
dc.identifier.chicagocitation Sugarman, David R. <i>"Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1999. http://hdl.handle.net/11427/9880 en_ZA
dc.identifier.vancouvercitation Sugarman DR. Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1999 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9880 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Sugarman, David R AB - 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. DA - 1999 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1999 T1 - Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa TI - Soil chemical properties in pine plantations of different ages in the Eastern Escarpement region of South Africa UR - http://hdl.handle.net/11427/9880 ER - en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record