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A preliminary account of growth characteristics and seed germination of Cassia mimosoides L. in Dohne Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.D. Steinke --- Department of Botany, Republic of South Africa L.O. Nel --- Department of Agriculture (Eastern Cape Region), Republic of South AfricaAn autecological study of Cassia mimosoides L., which invades mismanaged Dohne Sourveld, was initiated at the Agricultural Research Institute, Dohne. A study of the growth characteristics revealed that the nature of the root distribution enabled the plant to take up... -
An effective technique for breaking the seed dormancy of Acacia longifolia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- P.P.R.I, Weeds Research Unit, Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaThe effect of different pre-treatments on the dormancy of the hard-coated seeds of Acacia longifolia Andr. Willd. was determined. A final germination figure of 100% could be obtained with hot water treatments, acid scarification and manual scarification. However, if germination... -
The role of temperature in the germination of subterranean and aerial seeds of Commelina benghalensis L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.I. Ferreira --- , Republic of South Africa C.F. Reinhardt --- Department of Plant Production and Soil Science, Republic of South AfricaInformation on the temperature requirements for germination of weed seeds can be used to predict the soil temperature required for weed emergence. The germination behaviour of the two types of mature C. benghalensis seeds, ie. subterranean and aerial, were studied... -
Improving seed germination of Stylosanthes guianensis by means of warm water treatment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Erasmus --- Department of Agronomy, Republic of South Africa P.J. Pieterse --- Department of Agronomy, Republic of South AfricaThe effect of different warm water treatments on the dormancy of hard-coated Stylosanthes guianensis seeds was investigated. Light and dark coloured seeds were placed into water at different temperatures. Warm water treatments induced a large number of soft-coated seeds. The... -
Electrophoresis of leaf and seed proteins of Englerophytum natalense (fam. Sapotaceae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. Ham --- Department of Forestry, South Africa M. Bosman --- , South Africa P.J. Vorster --- Department of Botany, South AfricaEnglerophytum natalense is an indigenous South African tree, bearing edible fruits. In view of its potential for domestication, leaf and seed proteins were separated electrophoretically in order to investigate the existence and degree of variation within and between populations in... -
Breaking dormancy to improve germination in seeds of Acacia erioloba
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.K. Materechera --- Faculty of Agriculture, Science & Technology, Republic of South Africa S.A. Materechera --- Faculty of Agriculture, Science & Technology, Republic of South AfricaAlthough Acacia erioloba is an ecologically important indigenous leguminous tree in semi-arid areas of Southern Africa, its propagation remains difficult because of seed dormancy. Different techniques of scarifying the seeds to break dormancy were tested and compared viz.: non-scarified (control),... -
Comparison of osmopriming and seed coating with calcium salts for green bean performance under field conditions. I. Cotyledonal cracking
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.G. Mazibuko --- , A.T. Modi --- ,Cotyledonal cracking is a physiological disorder, which appears as one or a few transverse fissures across legume seed cotyledons early during seed germination or seedling emergence. The fissures hinder translocation of nutrients to the developing seedling and cause stunted seedling... -
Impact of seed burial depth on the emergence and growth of annual forage legumes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Francuois L Müller --- Department of Biodiversity and Conservation Biology, South Africa Lincoln Raitt --- Department of Biodiversity and Conservation Biology, South Africa Lilburne Cyster --- Department of Biodiversity and Conservation Biology, South AfricaThe importance of evaluating the tolerance of forages to deeper seed burial is often overlooked. Therefore, this study evaluated the effects of increased seed burial depth on the emergence, vigour and early seedling growth of annual forage legume cultivars in... -
Assessment of potential sources of protozoan contamination between two avian feeding guilds in a conservation area
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Adams A Chaskda --- AP Leventis Ornithological Research Institute, Department of Zoology, Nigeria Georgina S Mwansat --- Entomology and Parasitology Unit, Department of Zoology, Nigeria Danjuma Sani --- Entomology and Parasitology Unit, Department of Zoology, Nigeria Longtong Turshak --- Department of Science Laboratory Technology, NigeriaOccasional screening of food and water quality available to organisms in protected areas could be beneficial to their successful conservation. This is important for areas receiving regular human visitors and exhibiting activities that may be detrimental to ecosystem health. This... -
Design, fabrication and performance evaluation of centrifugal sunflower dehuller for small-scale enterprises in developing countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yuda Lyangalo Benjamin --- Department of Engineering Sciences and Technology, Tanzania Ezra Lazaro --- Department of Engineering Sciences and Technology, TanzaniaSunflower is grown by small-scale farmers in many developing countries like Tanzania. Lack of effective machines for dehulling sunflower seeds has resulted in high oil losses during extraction, especially for small- and medium-scale enterprise. This paper reports on the design,... -
Factors enhancing agricultural productivity under innovation technology: Insights from Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Francis Andrianarison --- United Nations Development Programme (UNDP), Cameroon Cyrille Bergaly Kamdem --- University of Yaounde II Soa, Cameroon Blaise Che Kameni --- University of Yaounde II Soa, CameroonThis paper analyzes the impact of innovation adoption, namely, improved seeds or modern equipment and examines the effects of farmer education, access to credit, and land tenure security on agricultural productivity in Cameroon. We take advantage of a nationally representative... -
Investigation on the foraging ecology of black crowned cranes at Lake Tana, Ethiopia, in the context of climate change impacts
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SA Zelelew --- Bahir Dar University, Ethiopia C Relton --- , South AfricaThere are significant gaps in understanding the food resources of the black crowned crane in the Lake Tana wetlands. This study examined macroinvertebrates in crane habitats, investigated the impact of rainfall on macroinvertebrates in relation to pollution tolerance, and identified...