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Evaluation of an undisturbed-soil incubation method as an index of soil nitrogen availability in a limed and non-limed soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Raath --- , Republic of South Africa D. Saayman --- Department of Soil and Agricultural Water Science, Republic of South AfricaNitrogen mineralization potentials were determined using an undisturbed-soil incubation procedure. The purpose of this study was to evaluate the above-mentioned method as an index of soil nitrogen availability. Undisturbed soil samples (0–150 and 150–300 mm) of a limed (pH 7.3)... -
Changes in inorganic phosphorus following incubation of some Zambian soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Kumoyo --- Department of Soil Science, Zambia O.A. Yerokun --- Department of Soil Science, Zambia M.I. Damaseke --- , ZambiaPhosphorus (P) deficiency is a major problem of many Zambian soils and annual applications of the recommended 60 kg P2O5 ha−1 (26 kg−1 ha−1) do not seem to reverse this trend. In order to better understand the dynamics of P... -
Retention of applied phosphorus by the benchmark soils of Lesotho and quantification of their phosphorus retention indices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- Faculty of Agriculture, LesothoThis study was conducted with the objective of determining and quantifying the capacity of Lesotho's benchmark soils to retain applied P. The soils were incubated with a range of P levels for a period of 42 days, whereafter P retention... -
Relations between phosphorus retention parameters and some other properties of benchmark soils in Lesotho
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- , LesothoThe benchmark soils of Lesotho are characterized by high P retention and this aspect should be accommodated in fertilization programmes. This together with long procedures for determination of P retention parameters and a lack of information on the relations between... -
The Role of Agribusiness Innovation Incubation for Africa's Development
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nicholas Ozor --- , KenyaThe global economic crisis coupled with increases in food and fuel prices and the looming impacts of climate change have necessitated that Africa should urgently rise up to these challenges and opportunities by promoting growth, food security, employment, poverty reduction... -
A comparison of methods for incubating zooplankton diapausing eggs from sediment of endorheic pans in the Free State, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SL Liefferink --- Department of Zoology, South Africa RB Tate --- Department of Zoology, South Africa JHJ van Vuren --- Department of Zoology, South Africa M Ferreira --- Department of Zoology, South Africa W Malherbe --- Unit for Environmental Sciences and Management, South AfricaDetermining the composition of zooplankton in endorheic pans can be challenging, and live sampling of these microcrustaceans does not give a true indication of their species diversity and abundance. The incubation of zooplankton diapausing eggs can assist in determining their... -
Pseudo-egg and exotic egg adoption by Kelp Gulls Larus dominicanus vetula
Item type: Journal Article • Journal: African Zoology • Authors: Minke Witteveen --- Percy FitzPatrick Institute of African Ornithology, University of Cape Town, South Africa Mark Brown --- School of Life Sciences, University of KwaZulu-Natal, South Africa Peter G Ryan --- Percy FitzPatrick Institute of African Ornithology, University of Cape Town, South AfricaGround-nesting birds, particularly larids, are known to include a variety of items in their nests as pseudo-eggs, as well as to adopt the eggs of conspecifics or other species. Three hypotheses have been put forward to explain this phenomenon: incubation... -
Clutch, egg and hatchling characteristics in the Souss Valley tortoises, Testudo graeca soussensis Pieh, 2001 (Testudines: Testudinidae) from an arid steppe-land of west-central Morocco
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Nawal Hichami --- , , Morocco Mohammed Znari --- , , Morocco Mohamed Naimi --- , , Morocco Salwa Namous --- , , MoroccoClutch, egg and hatchling characteristics in the Souss Valley tortoises Testudo graeca soussensis (Testudinidae) from an arid steppe area of west-central Morocco were investigated in semi captivity in spring–early summer 2011. Mating activity occurs twice in the year, mainly in... -
Business Incubation in Dar es Salaam
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Kristina Henricson Briggs --- Entrepreneurship and Strategy, SwedenBusiness incubation is increasingly emphasized on development agendas globally as a tool for entrepreneurship, employment and economic growth. Previous studies focus on comparing European and US business incubators, and outcomes of business incubation in sub-Saharan African settings are comparatively unknown... -
Black Sparrowhawk Accipiter melanoleucus breeding behaviour and reproductive success in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Erin P Wreford --- School of Life Sciences, South Africa Lorinda A Hart --- School of Life Sciences, South Africa Mark Brown --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaBlack Sparrowhawk Accipiter melanoleucus breeding behaviour and nest success was determined using camera traps and field observations in KwaZulu-Natal, South Africa. Nest preparation was done predominantly by the male with incubation and brooding largely performed by the female. Brooding duration... -
Parental care in a sexually monomorphic, ground-nesting passerine, the Pink-billed Lark Spizocorys conirostris (Alaudidae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: G Derek Engelbrecht --- Department of Biodiversity, School of Molecular and Life Sciences, South Africa Sean M Marr --- Department of Biodiversity, School of Molecular and Life Sciences, South AfricaWithin the family Alaudidae, most monomorphic species exhibit some degree of biparental care, but direct paternal care in most species is confined to food provisioning to offspring during the nestling period. Uniquely, the genus Spizocorys is the only sexually monomorphic... -
Youth, unemployment and incubation hubs in Southwest Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olayinka Akanle --- Department of Sociology, Faculty of Humanities, South Africa Abraham Omotayo --- Department of Sociology, Faculty of Social Sciences, NigeriaUnemployment is a social problem that affects a large percentage of Nigerians, directly and indirectly. It can lead to an increase in poverty in the country. Nigeria is a densely populated nation, with youths making up the largest share of... -
Nesting ecology and hatching success of the hawksbill turtle (2004–2014) on Cousine Island, Seychelles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Gane --- Centre for Functional Biodiversity, School of Life Sciences, South Africa CT Downs --- Centre for Functional Biodiversity, School of Life Sciences, South Africa I Olivier --- Centre for Functional Biodiversity, School of Life Sciences, South Africa M Brown --- Centre for Functional Biodiversity, School of Life Sciences, South AfricaPopulations of the Critically Endangered hawksbill turtle Eretmochelys imbricata in the Seychelles showed significant declines in the past. They have since recovered and nesting numbers are increasing because of increased protection and management intervention. Data on their nesting ecology on... -
Sources of technological learning among tenants of Nigeria’s incubators
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Caleb Muyiwa Adelowo --- , NigeriaPast literature on incubation has examined the benefits and roles incubators play in the stimulation of local and regional economies. Studies have also shown the enormous implications of technological and non-technological assistance to tenants’ enterprises. However, research on the process... -
The time-activity budgets of breeding Blue Swallows Hirundo atrocaerulea and the effects of weather on nestling growth
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- , South AfricaThe Blue Swallow is an intra-African migrant that breeds in its fragmented range from South Africa to southern Tanzania, from October to March annually. The birds migrate north and are on their non-breeding range in NE DRC, Uganda, NW Tanzania... -
A comparison of zinc sources and extraction methods on sandy soils suitable for maize cropping
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CF Wessels --- , South Africa LF van Straaten --- , South Africa CC du Preez --- , South Africa GM Ceronio --- , South AfricaMaize is the most important crop produced for human and animal nourishment in South Africa. The crop is susceptible to zinc (Zn) deficiencies, which result in lower grain yields with poorer nutritional value. Knowledge of the nature and behaviour of... -
Business incubation initiatives and innovation capabilities of micro-sized enterprises: Exploring the software ICT value chain
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluyemi Theophilus Adeosun --- University of Lagos Nigeria, Nigeria Ibrahim Ayodele Shittu --- University of Lagos Nigeria, NigeriaPromoting innovative capabilities in Small and Medium Scale Enterprises (SMEs) is crucial if African countries are to progress in terms of being active in the Global Value Chain (GVC) and achieve inclusive development. Enhancing innovative capabilities in the Information Communication... -
Effect of temperature on embryonic development and offspring performance of the African river prawn, Macrobrachium vollenhovenii
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Judith G Makombu --- University of Buea, Cameroon Cynthia A Bih --- University of Buea, Cameroon Geneva O Nkongho --- Institute of Agricultural Research for Development (IRAD), Cameroon Pius M Oben --- University of Buea, Cameroon Rollins N Ndi --- University of Buea, Cameroon Clovis N Chombe --- University of Buea, Cameroon Mercy B Verkijika --- University of Buea, Cameroon Gerry K Sonkeng --- Aquaculture Tropicale (Aqua-Tropic), Cameroon Tekou Guegang --- University of Dschang, Cameroon Janet H Brown --- Institute of Aquaculture, University of Stirling, United KingdomMacrobrachium vollenhovenii (Herklots, 1857), the largest of the indigenous West African Palaemonidae prawns, has a high potential for aquaculture. This work was carried out to assess the effect of temperature on embryonic development and offspring quality of this species. In...