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Calibration models for interpretation of soil salinity measurements using an electromagnetic induction technique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Johnston --- Department of Agronomy, Republic of South Africa M.J. Savage --- Department of Agronomy, Republic of South Africa J.H. Moolman --- Department of Soil and Agricultural Water Science, Republic of South Africa H.M. du Plessis --- , Republic of South AfricaA commercially available salinity sensor (model EM-38 of Geonics Ltd., Canada) has been developed for diagnosing and quantifying soil salinity in the field. There is a need, however, to calibrate the instrument reading against a more commonly used measure of... -
Determination of the timing and amount of irrigation of winter cover crops with the use of dielectric constant and capacitance soil water content profile methods
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.F. Gebregiorgis --- Soil-Plant-Atmosphere Continuum Research Unit, South Africa M.J. Savage --- Soil-Plant-Atmosphere Continuum Research Unit, South AfricaA well-managed irrigation scheduling system needs a rapid, precise, simple, cost-effective and non-destructive soil water sensor that allows for measurements at different depths and different locations across the cropped area. Two soil water content profile measurement methods were used and... -
On-board computing in forest machinery as a tool to improve skidding operations in South African softwood sawtimber operations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marco Pellegrini --- Department of Forest and Wood Science, South Africa Pierre Ackerman --- Department of Forest and Wood Science, South Africa Raffaele Cavalli --- Department of Land, Environment, Agriculture and Forestry, ItalyOn-board computing (OBC) systems in South African timber-harvesting operations are currently limited because of the lack of local expertise and experience. In this study three trials were conducted, monitoring three skidder extraction operations at three sites in South African softwood... -
Water quality monitoring in sub-Saharan African lakes: a review of remote sensing applications
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dube --- School of Agricultural, Earth and Environmental Sciences, South Africa O Mutanga --- School of Agricultural, Earth and Environmental Sciences, South Africa K Seutloali --- School of Agricultural, Earth and Environmental Sciences, South Africa S Adelabu --- Department of Geography, South Africa C Shoko --- School of Bioresources Engineering and Environmental Hydrology, South AfricaWater quality deterioration in sub-Saharan Africa has attained a scale that requires scientific intervention. It is therefore important to devise appropriate and reliable techniques to investigate the water quality of lakes and reservoirs for the development of water resource management... -
The use of technology in a water treatment process
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Magdi Osman Ali --- Faculty of Science and Arts and Community - Muhyil Assir, Saudi Arabia Abdalrasol J. Alzubaidi --- Faculty of Engineering, SudanAutomation is an essential part of producing drinking water in the necessary quantities at the right time with high levels of efficiency in water production, energy and chemical materials consumption. The primary objective of this paper is to propose strategies... -
Estimating forest carbon stocks in tropical dry forests of Zimbabwe: exploring the performance of high and medium spatial-resolution multispectral sensors
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tawanda W Gara --- Department of Geography and Environmental Science, Zimbabwe Amon Murwira --- Department of Geography and Environmental Science, Zimbabwe Timothy Dube --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa Mbulisi Sibanda --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa Donald T Rwasoka --- Faculty of Geo-information Science and Earth Observation, The Netherlands Henry Ndaimani --- Department of Geography and Environmental Science, Zimbabwe Emmerson Chivhenge --- Department of Geography and Environmental Science, Zimbabwe Chipo M Hatendi --- Department of Geography and Environmental Science, ZimbabweEstimation and mapping of forest dendrometric characteristics such as carbon stocks using remote sensing techniques is fundamental for improved understanding of the role of forests in the carbon cycle and climate change. In this study, we tested whether and to... -
A systematic review of remote sensing and machine learning approaches for accurate carbon storage estimation in natural forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Collins Matiza --- University of KwaZulu-Natal, South Africa Onisimo Mutanga --- University of KwaZulu-Natal, South Africa Kabir Peerbhay --- University of KwaZulu-Natal, South Africa John Odindi --- University of KwaZulu-Natal, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaThe assessment of carbon storage in natural forests is paramount in the ongoing efforts against climate change. While traditional field-based methods for quantifying carbon storage pose challenges, recent advancements in remote sensing and machine learning offer efficient and innovative alternatives...