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Effect of soil fertility management strategies and resource-endowment on spatial soil fertility gradients, plant nutrient uptake and maize growth at two smallholder areas, north-western Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Nyamangara --- Department of Soil Science and Agricultural Engineering, Zimbabwe E. Makarimayi --- Department of Soil Science and Agricultural Engineering, Zimbabwe E.N. Masvaya --- Department of Soil Science and Agricultural Engineering, Zimbabwe S. Zingore --- , Malawi R.J. Delve --- , ZimbabweWe investigate the effects of smallholder farmer resource—endowment and soil nutrient management strategies on plant nutrient uptake and growth across soil fertility gradients under semi-arid conditions. Soil fertility gradients as influenced by farmers’ resource availability may affect the response of... -
Comparison of procedures to evaluate the pathogenicity of Ceratocystisfimbriata sensu lato isolates from Eucalyptus in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M van Wyk --- Department of Genetics, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa RN Heath --- Department of Genetics, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa M Tarigan --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa M Vermeulen --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa MJ Wingfield --- Department of Genetics, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South AfricaCeratocystis fimbriata sensu lato (s.l.) is an important pathogen of Eucalyptus. Pathogenicity of isolates has typically been evaluated by inoculating seedlings under greenhouse conditions. It is, however, not clear how accurately this reflects pathogenicity under field conditions. In this study,... -
Stem biomass and volume models of selected tropical tree species in West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: GHS Guendehou --- , Bénin A Lehtonen --- , Finland M Moudachirou --- Laboratoire de Pharmacognosie, Faculté des Sciences et Techniques, Bénin R Mäkipää --- , Finland B Sinsin --- Laboratoire d'Ecologie Appliquée, Faculté des Sciences Agronomiques, BéninEstimating tree volume and biomass constitutes an essential part of the forest resources assessment and the evaluation of the climate change mitigation potential of forests through biomass accumulation and carbon sequestration. This research article provides stem volume and biomass equations... -
Tolerance of Pinus patula full-sib families to Fusarium circinatum in a greenhouse study
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: RG Mitchell --- , South Africa MJ Wingfield --- Forestry and Agricultural Biotechnology Institute, South Africa ET Steenkamp --- Forestry and Agricultural Biotechnology Institute, South Africa TA Coutinho --- Forestry and Agricultural Biotechnology Institute, South AfricaThe pitch canker fungus, Fusarium circinatum, has caused large-scale mortality of young Pinus patula Schiede and Deppe ex Schltdl. and Cham. seedlings in nurseries in South Africa since 1990. Diseased seedlings have been inadvertently carried to the field, which in... -
Microclimate conditions in ventilated wet-walled greenhouses in a subtropical climate: spatial variability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaSpatial variations of microclimatic conditions in enclosed north–south (N–S) oriented single-arched greenhouse polycarbonate structures, with a wet-wall providing evaporative cooling at the S end, were investigated and displayed online in near real-time. Temperature-controlled fans at the N end extracted air... -
Genetic parameters for Fusarium circinatum tolerance within openpollinated families of Pinus patula tested at screening facilities in South Africa and the USA
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Andre Nel --- Sappi Forest Research, South Africa Gary R Hodge --- Department of Forestry and Natural Resources, USA Kgosi E Mongwaketsi --- Sappi Forest Research, South Africa Arnulf Kanzler --- Sappi Forest Research, South AfricaThe pine pitch canker fungus, Fusarium circinatum, has caused large-scale mortality of Pinus patula Schiede & Deppe ex Schltdl. & Cham. crops in South African nurseries. This disease is now managed with strict hygiene practices and mortality in commercial nurseries... -
Greenhouse gas inventory: A case of gas flaring operations in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Solomon O. Giwa --- Department of Agricultural and Mechanical Engineering, Nigeria Abayomi T. Layeni --- Department of Agricultural and Mechanical Engineering, Nigeria Collins N. Nwaokocha --- Department of Agricultural and Mechanical Engineering, Nigeria Musedik A. Sulaiman --- Department of Agricultural and Mechanical Engineering, NigeriaInventories of the greenhouse gases (GHGs) emitted into the atmosphere through gas flaring are scarce; hence, the need for this study. Formulae reported by the Association of Petroleum Institute were used for estimating GHGs based on data (1965 to 2013)... -
Improved parameters of Pinus greggii seedling growth and health after inoculation with ectomycorrhizal fungi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rebeca Casique Valdés --- Department of Horticulture, Mexico Rosalinda Mendoza Villarreal --- Department of Horticulture, Mexico Fernando Galindo García --- Department of Horticulture, Mexico Susana González Morales --- Department of Horticulture, Mexico Sergio Sanchez Peña --- Department of Parasitology, MexicoPinus greggii Engelm. ex Parl. is an endemic pine of Mexico with notorious adaptability to eroded, shallow and poor soils. It is widely used in reforestation programmes worldwide. The purpose of the present study is to develop an ectomycorrhizal fungi... -
Tier 2 above-ground biomass expansion functions for South African plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Steven Dovey --- , South Africa Ben du Toit --- , South Africa Jacob Crous --- , South AfricaCarbon stocks estimated for greenhouse gas emission reporting in South African plantation forests require improvement for local relevance. We developed biomass expansion and conversion factor (BECF) models to convert enumeration data to above-ground biomass (AGB) for major genera. Local biomass... -
Soil C sequestration and CO2 fluxes under maize-based Conservation Agriculture systems in the Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lindah Muzangwa --- , South Africa Pearson Nyari Stephano Mnkeni --- , Tanzania Cornelius Chiduza --- , South AfricaTraditional farming methods deplete soil carbon and contribute to carbon dioxide (CO2) emissions. We investigated the effects of Conservation Agriculture principles on C sequestration and CO2 flux from two agroecological regions in the Eastern Cape province, South Africa, over five... -
Evaluating the role of combustible renewable and waste in reducing greenhouse gas emissions in the long run in Malaysia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Jayanthi R Alaganthiran --- Universiti Malaya, Malaysia Santha Chenayah --- Universiti Malaya, Malaysia Rajah Rasiah --- Universiti Malaya, MalaysiaMalaysia has been struggling to effectively manage waste which accounts for a substantial amount of greenhouse gases. Thus, the objective of this study was to identify whether renewable energy from combustible renewable and waste could significantly reduce the total greenhouse... -
Greenhouse gas concentrations in tropical wetlands of the Cross River estuary, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Andem --- University of Calabar, Nigeria OB Ojo --- University of Calabar, Nigeria RA Odey --- University of Calabar, Nigeria GE Eni --- University of Calabar, Nigeria OR Ibor --- University of Calabar, Nigeria IA Iwara --- University of Calabar, Nigeria VO Eyo --- Nigerian Maritime University, NigeriaThe Cross River estuary is a coastal wetland in the south-eastern part of the Niger Delta region of Nigeria with its hydrological cycle largely dependent on precipitation. The purpose of this study was to determine the greenhouse gas (GHG) concentrations...