Author:Verryn, SDDate:2008A challenge for breeders and wood quality researchers of today is to appropriately respond to a complex environment demanding more productivity, higher quality, and a quicker adaptation of their crops to rapid changes. This is mirrored in the ...Read more
Author:Verryn, SD; Snedden, CLDate:30 Aug 2010This presentation outlines the South African plantation forestry sector and its contributions and improvement in productivity, acquiring genetic diversity, challenges and advances in genetically improving trees as well as transforming the ...Read more
Author:Ojwang, ADate:2000Partnerships between communities and private companies have been tried and tested in various regions within Africa and the world. Community-Private-Public Partnerships exist in various sectors such as mining, agriculture, tourism and forestry. ...Read more
Author:Eatwell, KA; Verryn, SD; Roux, CZ; Geerthsen, PJMDate:2011Collinearity potentially has a negative impact on the prediction of genetic gains in tree breeding programs. This study investigated the reliability and impact of best linear unbiased prediction (BLUP) using various collinearity mitigation ...Read more
Author:Le Roux, D; Stock, WD; Bond, WJ; Maphanga, DDate:May 1996Clonal variation in water use efficiency (WUE), dry mass accumulation and allocation, and stable carbon isotope ratio (delta (13)C) of crude leaf fibre extracts was determined in six clones of Eucalyptus grandis W. Hill ex Maiden grown for ...Read more
Author:Van Wilgen, BDate:2012The Table Mountain National Park is a 265 km2 protected area embedded within a city of 3.5 million people. The park contains an extremely diverse flora with many endemic species, and has been granted World Heritage Site status in recognition ...Read more
Author:Van Aardt, JAN; Wynne, RHDate:Jan 2007Three southern USA forestry species, loblolly pine (Pinus taeda), Virginia pine (Pinus virginiana), and shortleaf pine (Pinus echinata), were previously shown to be spectrally separable (83% accuracy) using data from a full-range spectro-radiometer ...Read more
Author:Scott, DF; Le Maitre, David C; Fairbanks, DHKDate:Jul 1998Forestry is an important sector of industry in South Africa but the growing of timber places significant demands on the available water resources. Yet, a ready source of information on the extent, and probable hydrological impacts, of ...Read more
Author:Khosa, MDate:2000The outsourcing of forestry activities over the past decade has created an industry with an annual turnover of R600 million and 35000 employees (Edwards, 2000). During the past decade forestry companies have switched from employing some of ...Read more
Author:Staver, C; Archibald, S; Levin, SADate:Oct 2011Theoretically, fire–tree cover feedbacks can maintain savanna and forest as alternative stable states. However, the global extent of fire- driven discontinuities in tree cover is unknown, especially accounting for seasonality and soils. The ...Read more
Author:Verryn, SDDate:Jul 2008The CSIR Tree Improvement Research Group has an approximately 50 year old eucalypt and pine species breeding research program and during this time over 50 species and hybrids have been included in the program. By 1994, the CSIR initiated it’s ...Read more
Author:Le Maitre, David C; Van Wilgen, BW; Gelderblom, CM; Bailey, C; Chapman, RA; Nel, JADate:01 May 2002Invasive alien plants are consumptive water-users, and may have reduced river flows in South Africa by about 6.7% according to a broad-scale study. An effective programme to bring the invasions under control would cost about US$ 92 million ...Read more
Author:Van Wilgen, BW; Forsyth, GG; Prins, PDate:Mar 2012The Table Mountain National Park is a 265-km² conservation area embedded within a city of 3.5 million people. The highly diverse and unique vegetation of the park is both fire prone and fire adapted, and the use of fire forms an integral part ...Read more
Author:Scott, DFDate:Jul 1999The reductions in streamflow associated with timber plantations are of particular concern in South Africa and, as a means of sustaining flows; permits granted by the state for the establishment of plantations have required that plantings ...Read more
Author:Fairbanks, DHKDate:Jul 2000In an effort to develop more holistic ecosystem approaches to resource assessment and management, landscapes need to be stratified into homogeneous geographic regions. These regions can then be used in a monitoring framework to develop reliable ...Read more
Author:Naidoo, SashaDate:Mar 2011This research aimed to quantify and model the effects of specific environmental variables on the wood quality of Eucalyptus grandis in the warm temperate (WT) and sub-tropical (ST) forestry regions in South Africa using nondestructive, rapid ...Read more
Author:Amezaga, JM; Harrison, J; Von Maltitz, Graham P; Tennigkeit, T; Tiwari, S; Windhorst, KDate:Jun 2009Re-Impact "Rural Energy Production from Bioenergy Projects" is a project funded by the European Union Aid Cooperation office which is promoting a sustainability assessment framework for bioenergy projects focussed on rural development in ...Read more
Author:Van Wilgen, BW; Richardson, DMDate:May 2012Alien conifers, mainly pines, have been planted in South Africa for a range of purposes for over 300 years. Formal plantations cover 660 000 ha of the country, and invasive stands of varying density occur on a further 2.9 million ha. These ...Read more
Author:Scholes, RJ; Dowty, PR; Caylor, K; Parsons, DAB; Frost, PGH; Shugart, HHDate:Jun 2002The Kalahari sand sheet occupies 2.5 million ha in southern Africa. It is an area with relatively similar deep Aeolian soils, and a strong south to north gradient in rainfall, from 200 to 1000 mm mean annual precipitation (MAP) in the region ...Read more