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Browsing by Subject "Eucalyptus grandis"

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Comparison between sensors with different spectral resolutions, relative to the sumbandila satellite, for assessing site quality differences, in eucalyptus grandis plantations

Author: Main, Russell S ; Cho, Moses A ; Van Aardt, J ; Majeke, B Date: Oct 2008 The majority of earth observation studies have for years made use of data from multispectral spaceborne sensors. More recently though, both airborne and spaceborne narrowband hyperspectral sensors have come to the fore and are able to provide ... Read more
Comparison of deterministically predicted genetic gains with those realised in a South African Eucalyptus grandis breeding program

Author: Verryn, SD ; Snedden, CL ; Eatwell, KA Date: Jun 2009 Tree breeders attempt to predict the genetic gains that are likely to be achieved through selection and breeding of new generations, using stochastic or deterministic modelling. There are many factors that may cause a discrepancy between the ... Read more
Effect of moisture availability on wood density and vessel characteristics of Eucalyptus grandis in the warm temperate region of South Africa

Author: Naidoo, Sasha ; Zbonak, A ; Ahmed, F Date: Sep 2006 Productivity of forest plantations in South Africa is highly dependant on soil moisture availability. Soil moisture availability is often limited and evaporative demand is high. Eucalyptus grandis, planted extensively in South Africa, is ... Read more
The effect of propagation methods on some growth and physiological characteristics of seed- and vegetatively propagated Eucalyptus varieties

Author: Mokotedi, O ; Watt, P ; Pammenter, N Date: Nov 2011 The purpose of this study was to deepen our understanding of the field performance of micro- and macro-propagated Eucalyptus grandis x nitens (GN), in comparison with seed-propagated E. grandis and E. nitens. The emphasis was on the relationship ... Read more
Evaluating variations of physiology-based hyperspectral features along a soil water gradient in Eucalyptus grandis plantation

Author: Cho, Moses A ; van Aardt, J ; Main, Russell S ; Majeke, B Date: Apr 2010 Remote sensing is viewed as a cost-effective alternative to intensive field surveys in assessing site factors that affect growth of Eucalyptus grandis over broad areas. The objective of this study was to assess the utility of hyperspectral ... Read more
Extraction of hemicellulose from South African eucalyptus grandis using weak white liquor activation technology and its impact on kraft pulping efficiency

Author: Johakimu, Jonas K ; Sithole, Bishop B Date: Sep 2017 This work summarises the findings of our research on the activation of woodchips using weak white liquor as an alternative mill self-generated alkaline solvent. The ultimate goal was to gain a better understanding on: the effectiveness of the ... Read more
Forest evaporation models: Relationships between stand growth and evaporation

Author: Le Maitre, David C ; Versfeld, DB Date: Jun 1997 The relationships between forest stand structure, growth and evaporation were analysed to determine whether forest evaporation can be estimated from stand growth data. This approach permits rapid assessment of the potential impacts of ... Read more
Identification of PCR-base markers linked to wood splitting in Eucalyptus Grandis

Author: Barros, E ; Verryn, S ; Hettasch, M Date: Jul 2002 Wood splitting is a defect in eucalyptus which results in considerable losses when converting logs to solid wood products. Commonly in forestry, molecular markers are identified through studying pedigrees from a single cross. This limits the ... Read more
Image fusion for enhanced forest structural assessment

Author: Roberts, JW ; Van Aardt, JAN ; Ahmed, FB Date: Jan 2011 This research explores the potential benefits of fusing active and passive medium resolution satellite-borne sensor data for forest structural assessment. Image fusion was applied as a means of retaining disparate data features relevant to ... Read more
Integrating remote sensing and ancillary data for regional ecosystem assessment: eucalyptus grandis agro-system in kwazulu-Natal, South Africa

Author: Cho, Moses A ; Van Aardt, J ; Main, Russell S ; Majeke, B ; Mathieu, Renaud SA ; Norris-Rogers, M ; Du Plessis, M ; Ramoelo, Abel Date: Jul 2009 The study demonstrates that the integration of remote sensing and in situ data could be important in providing more accurate estimates of E. grandis state in KwaZulu Natal, South Africa compared to remote sensing models. Such modelling effort ... Read more
Investigation of ESEM/EDX to measure liquor penetration and diffusion in Eucalyptus grandis wood chips during kraft pulping

Author: Grzeskowiak, V ; Hanuman, A ; Andrew, J Date: 2011 Environmental scanning electron microscopy coupled with energy dispersive x-ray (ESEM/EDX) was optimised to measure the penetration and diffusion of cooking liquor into Eucalyptus grandis wood chips during kraft pulping. The moisture content ... Read more
Microarray-based method for the parallel analysis of genotypes and expression profiles of wood-forming tissues in Eucalyptus grandis

Author: Barros, E ; Van Staden, C ; Lezar, S Date: May 2009 Fast-growing Eucalyptus grandis trees are one of the most efficient producers of wood in South Africa. The most serious problem affecting the quality and yield of solid wood products is the occurrence of end splitting in logs. Selection of ... Read more
Quantifying and modelling the effects of environmental factors on wood properties of Eucalyptus grandis in South Africa

Author: Naidoo, Sasha Date: Mar 2011 This 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
Streamflow responses to afforestation with Eucalyptus grandis and Pinus patula and to felling in the Mokobulaan experimental catchments, South Africa

Author: Scott, DF ; Lesch, W Date: 10 Dec 1997 The reductions in streamflow following the afforestation of grassland with Eucalyptus grandis and Pinus patula in the Mokobulaan research catchments on the Mpumalanga escarpment, and the subsequent response in streamflow to clearfelling of ... Read more

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Browsing by Subject "Eucalyptus grandis"

Browsing by Subject "Eucalyptus grandis"

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