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Fertilising Commercial Forest Species in Southern Africa: Research Progress and Problems (Part 1)
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.A. Herbert --- , South Africa A. P.G. Schönau --- , South AfricaSince the inception of forest fertiliser research in Southern Africa in 1926, eight eucalypt, six pine and four acacia species have been tested, encompassing a wide range of sites in summer, winter and uniform rainfall areas. Marked deficiencies of P,... -
Litterfall and Nutrient Release in Mature Pinus radiata in the South-western Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Division of Forest Science and Technology, CSIR, Jonkershoek F.R.C., D. G.M. Donald --- Faculty of Forestry,Fast-growing plantations of conifers have replaced areas of mediterranean shrubland in the south-western Cape. This study arises from the need to quantify the impacts of major changes in primary productivity, litterfall, and nutrient cycling in terms of the site utilisation... -
Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South AfricaAir-dried soil from three layers under grassveld was moistened by the addition of 12 levels of water and incubated for up to two years at five temperatures in screw-capped preserving jars with an air-filled head- space equivalent to seven times... -
Comparison of aluminium, basic cations and acidity in the soil of indigenous forests and pine stands in the southern Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Clough --- Saasveld Forestry Research Centre, Republic of South AfricaLitter and topsoil were sampled in plantations of Pinus elliottii and Pinus taeda and in adjacent indigenous forest in three different locations in the southern Cape, to study some of the effects on the soil of the establishment of pine... -
NUTRIENTS IN AQUATIC ECOSYSTEMS: AN INTRODUCTION TO SIMILARITIES BETWEEN FRESHWATER AND MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P Chapman --- , South Africa JA Thornton --- , South Africa -
NUTRIENTS IN AFRICAN LAKE ECOSYSTEMS: DO WE KNOW ALL?
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- , South AfricaIt is nearly sixty years since the first studies were undertaken on the nutrient chemistry of African lakes. There have been numerous studies on the chemical composition of African waters in the intervening years. Yet as recently as five years... -
NUTRIENT CYCLING IN MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P. Chapman --- , South AfricaThe overall cycles of nitrogen, phosphorus and silicon in the sea are described and compared. Data on the fluxes and rates of change between various pools of each nutrient are given, where available, and gaps in knowledge are pointed out... -
NUTRIENTS AND THE PRODUCTIVITY OF ESTUARINE AND COASTAL MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.W. Nixon --- Marine Ecosystems Research Laboratory, United States of America C.A. Oviatt --- Marine Ecosystems Research Laboratory, United States of America J. Frithsen --- Marine Ecosystems Research Laboratory, United States of America B. Sullivan --- Marine Ecosystems Research Laboratory, United States of AmericaRecent research on estuarine and coastal marine systems has revealed two particularly interesting things about nutrients and productivity. First is the observation that these areas are among the most intensively fertilized environments on earth. Second is the common finding that... -
Production and decomposition of plant litter in an arid rangeland of Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WN Ekaya JI KinyamarioData on litter production and decomposition in an arid rangeland in Kenya was collected over a two-year period. Utter sampling was carried out at monthly intervals using a rectangular 0.25m−2 quadrat frame. Utter within the quadrats was handpicked and washed... -
The effect of long-term mowing and ungulate exclusion on grass species composition and soil nutrient status on the Athi-Kapiti plains, central Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: D. Berliner J. KiokoThe long-term (>30 years) impacts of mowing (for hay-making) and ungulate exclusion, on natural, unfertilised rangelands were investigated. Changes in grass species composition and soil nutrient status were measured The study site, situated on the Athi-Kapiti plains of central Kenya,... -
Nutrient cycling by Acacia erioloba (syn. Acacia giraffae) in smallholder agroforestry practices of a semi-arid environment in the North West Province, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R.N. Murovhi S.A. MaterecheraAcacia erioloba is an ecologically important indigenous leguminous tree in semi-arid areas of Southern Africa because of the many benefits it offers to local communities. However, little quantitative plant and soil data exist to explain its ability to enhance soil... -
The effects of fire on wetland structure and functioning
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DC Kotze --- School of Agriculture, Earth and Environmental Sciences, South AfricaFire is an extensively used wetland management tool in both tropical and temperate areas, but its effects on wetlands are not well understood. The purpose of this paper is to review the effects of fire on wetland hydrology, biogeochemical cycling... -
Litter Fall and Decomposition in Stands of Mature Pinus radiata
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Department of Water Affairs, Forestry and Environmental Conservation,Rates of litter fall in mature stands of Pinus radiata D. Don have been monitored at the Jonkershoek Forestry Research Station since 1976. Decomposition trials were laid out in June 1977. Litter fall has been collected on six sites in... -
A critical view on the soil fertility status of minimum-till kikuyu–ryegrass pastures in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Department of Agronomy, South Africa Chris C du Preez --- Soil, Crop and Climate Sciences, South Africa Philip R Botha --- Research and Technology Development Services, Department of Agriculture Western Cape, South Africa Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South AfricaCultivated pastures provide increased productivity and contribute inter alia to food security. Rangelands in the southern Cape region of South Africa have had a low animal production potential and were therefore improved through time as cultivated pastures. Initially, annual pastures... -
Decomposition of cattle dung on grazed signalgrass (Brachiaria decumbens Stapf) pastures in monoculture or intercropped with tree legumes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hugo NB Lima --- Animal Science, Brazil Jose C Dubeux Jr --- North Florida Research and Education Center, USA Mercia VF dos Santos --- Animal Science, Brazil Alexandre CL de Mello --- Animal Science, Brazil Mario A Lira --- Animal Science, Brazil Marcio V Cunha --- Animal Science, BrazilLivestock excreta is one of the major nutrient sources in natural grasslands. Understanding how livestock diet and season affects the decomposition dynamics is critical to nutrient cycling models. We hypothesised that livestock diet and season of the year affect dung... -
Informal waste recycling activities: Implications for livelihood and health
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kehinde Oluwaseun Omotoso --- Department of Economics, South AfricaInformal waste recycling activities are fast becoming commonplace in most developing countries. Using South Africa as a case study, this study characterizes informal collection of recyclable waste materials. It also explores the roles of informal collection of recyclable waste materials... -
The cost-effectiveness of using latrine dehydrated and pasteurization pellets and struvite: Experimental evidence from South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Benjamin Chapeyama --- School of Agricultural, Earth and Environmental Sciences, South Africa Edilegnaw Wale --- School of Agricultural, Earth and Environmental Sciences, South Africa Alfred Odindo --- School of Agricultural, Earth and Environmental Sciences, South AfricaFaecal sludge and urine can be recycled and processed into usable fertilizer products such as the latrine dehydrated and pasteurization (‘LaDePa’) pellets and struvite, respectively. To quantitatively determine the financial cost effectiveness of using LaDePa and struvite, a study was... -
Disconnect between policy and practice in developing countries: Evidence of managing e-waste from Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Johnson Ojiyovwi Okorhi --- Institute of Engineering, Technology, and Innovation Management, Nigeria Joe E. Amadi-Echendu --- Institute of Engineering, Technology, and Innovation Management, Nigeria Helen Olubunmi Aderemi --- Department of Management and Accounting, Nigeria Roland Uhunmwangho --- Electrical/Engineering Department, Nigeria Anthony Chukwudi Okwubunne --- National Centre for Technology Management (NACETEM), NigeriaThere are insufficient management functions that begin with planning, institutional arrangements and technical handling of e-waste materials in Nigeria. Modern trends in recycling still fall short of global practices. This study examined Waste Electrical and Electronic Equipment (WEEE) management strategies... -
A review of the influence of municipal sustainable supply chain management on South Africa’s recycling performance
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fannie Machete --- College of Agriculture and Environmental Sciences, South AfricaThis paper reviews the influence of municipal sustainable chain management on South Africa’s recycling performance. In this study, municipal supply chain management systems are identified as one of the major factors that influence the lack of municipal solid waste services... -
Annual litter production in a Brazilian Cerrado woodland savanna
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Alan N Costa --- , Brazil Alessandra Bartimachi --- , Brazil Heraldo L Vasconcelos --- , USA Emilio M Bruna --- , USA Ernane HM Vieira-Neto --- , USAThe Brazilian Cerrado is a heterogeneous ecosystem where annual woody-layer litter production shows strong spatiotemporal variation. Although Cerrado litter dynamics have been well-documented in forest physiognomies, knowledge from savanna habitats remains limited despite their predominance across the landscape. In this... -
Long-term wheat production management effects on soil fertility indicators in the semi-arid eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Palo Francis Loke --- , South Africa Johannes Jacobus Schimper --- , South Africa Elmarie Kotzé --- , South Africa Christiaan Cornelius du Preez --- , South AfricaThis study evaluated temporal effects of wheat production management practices on soil fertility under semi-arid conditions. Treatments applied for 37 years included straw management (unburned and burned), tillage practices (no-tillage, stubble mulch, and mouldboard ploughing) and weed control methods (chemical... -
The contribution of participatory engagement strategies to reliable data gathering and inclusive policies in developing countries: Municipal solid waste management data in the Greater Accra Metropolitan Area of Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kwaku Oduro-Appiah --- , Cape Coast, Ghana Anne Scheinberg --- , the Netherlands Abraham Afful --- , Cape Coast, Ghana Nanne de Vries --- , the NetherlandsThe absence of participatory engagement strategies in the collection of solid waste management data in most developing countries affects reliability and deprives professional staff and local authorities of any clear basis for system modernization. This article addresses these challenges in... -
Recycling of municipal solid waste in India: Empirical findings from some select colonies in Delhi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Madhav Govind --- , India Mirinchonme Mahongnao --- , IndiaThe growing volume of municipal waste has become a serious challenge for urban local bodies in Indian cities. The non-segregation of waste at the source is one of the main reasons for the low percentage of municipal waste being recycled... -
Adoption of eco-bricks for housing: the case of Yelwa, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Uche Emmanuel Edike --- , Nigeria Omotayo Aina --- , Nigeria Adebowale Babalola Adeoye --- , NigeriaThe benefits of eco-bricks have been highlighted in contemporary literature. Notwithstanding, the adoption of eco-bricks masonry for the construction of houses in rural communities of low-income countries is significantly low. This study investigated the features, benefits, drivers and barriers to... -
Nitrogen mineralisation and N2O emissions in pure and mixed-species plantations of Eucalyptus urograndis and Acacia mangium
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felipe Martini Santos --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Danilo Henrique dos Santos Ataíde --- , Brazil Pedro Vaz da Rocha --- , Brazil Bruno JR Alves --- , Brazil Guilherme M Chaer --- , BrazilWe hypothesised that N inputs to the soil from residues of adult trees of Acacia mangium Willd. increase soil nitrate availability and consequently induce higher nitrous oxide (N2O) fluxes, irrespective of being in pure or mixed stands with Eucalyptus. A... -
Potentials of fabric scraps management for value creation among fashion designers in South West Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwafeyikemi E. Bashorun --- Olabisi Onabanjo University, Nigeria Idris O. Badiru --- University of Ibadan, Nigeria Mojisola F. Oyewole --- University of Ibadan, Nigeria Taibat T. Adebisi --- University of Ilorin, Nigeria Olufunmilayo O. Braide --- Federal University of Agriculture, Nigeria Adenike O. Lawal --- Olabisi Onabanjo University, NigeriaThe global fashion industry generates substantial fabric waste, contributing to severe environmental pollution. Fabric Scraps Management (FSM) practices offer a pathway to mitigating waste while fostering value creation. This study investigates the quantity of Fabric Scraps (FS) produced, the level...