Search
Search results for
We found
39 results for you
-
Field Performance of Micropropagated and Macropropagated Eucalyptus Hybrids
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.P. Watt --- Department of Biology, South Africa E.A. Duncan --- Department of Biology, South Africa M. Ing --- Department of Biology, South Africa F.C. Blakeway --- Department of Biology, South Africa B. Herman --- Department of Biology, South AfricaPlantlets derived, via both in vitro micropropagation and from rooted cuttings, from seven different Eucalyptus hybrid genotypes were assessed for their field performance in Kwambonambi, KwaZulu Natal. Tree survival, height, mean annual increment, diameter at breast height and size uniformity... -
Root Initiation in Ocotea bullata (Burch.) Baill. Cuttings
Item type: Journal Article • Journal: South African Forestry Journal • Authors: K. Farnsworth --- , Republic of South Africa WilmaG. Gaum --- , Republic of South AfricaOcotea bullata (Burch.) Baill. is known for its difficulty in propagation from cuttings. This preliminary study investigated the potential of ‘Rockwool’ as a rooting medium as compared to the more conventional bark, sand, mixtures of these two, and coir. It... -
Produksie en kwaliteit van ‘n aantal grasspesies in die Combretum‐veld van noord‐transvaal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, J.O. Grunow --- Departement Plantproduksie, Fakulteit Landbouwetenskappe,Die produksie en kwaliteit van vyf spesies (Themeda triandra, Heteropogon contortus, Digitaria eriantha var. pentzii, Schmidtia pappophoroides en Eragrostis rigidior) is by verskillende frekwensies van ontblaring op ontbosde en onontbosde bosveld gemeet. In die daaropvolgende jaar is intensiteit bygebring met... -
‘N vergelyking tussen digitaria eriantha steud. subsp. eriantha (smutsvingergras) en eragrostis curvula (schrad.) nees (oulandsgras) as hooigewasse vir skape1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C S Dannhauser --- , W L J Van Rensburg --- , D P J Opperman --- ,Smutsvingergras‐ en oulandsgrashooi is by drie bemestingspeile, naamlik 30 kg N + 2,8 kg P ha‐1; 90 kg N + 8,3 kg P ha‐1 en 150 kg N + 13,8 kg P ha‐1 geproduseer. Die hooi is in alle voorgenoemde... -
Identification of companion legumes for midmar Italian ryegrass
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.R.H. Smith --- Department of Agriculture (Transvaal Region),In a preliminary investigation seven legumes were planted alone and in combination with Lolium multiflorum cv. Midmar. The pure stands of legumes were harvested at either four, five or six week cutting intervals, while the pure stands of Lolium multiflorum... -
Identification of companion small grains for midmar Italian ryegrass
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.R.H. Smith --- , C.P. Dempsy --- Department of Agriculture (Transvaal Region), M. Schaffner --- Department of Agriculture (Transvaal Region),In a preliminary investigation four small grain species, oats (Avena sativa), rye (Secalae cereale), wheat (Triticum aestivum) and triticale (Triticum × secalae) were planted alone and in combination with Lolium multiflorum cv Midmar under irrigation. The dry matter (DM) yield... -
Leucosidea sericea — control in southern Lesotho
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.J. Goebel --- Department of Natural Resource Sciences, U.S.A. V. Ramakhula --- Farming System Research, Lesotho G. Seutloali --- Farming System Research, LesothoTebuthiuron chemical treatments were effective in controlling Leucosidea sericea shrubs upon rangelands of the Quthing sheep stud station in southern Lesotho. Cutting treatments were also effective but more labour intensive. Repeated applications of 2,4,5‐T and fire resulted in less mortality... -
Die rol van koolhidraatreserwes by kwekeryprestasie van appelhardehoutsteggies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. J.C. Stassen --- ,Sterk eenjarige winterlote van 'n tien-jaar-oue Merton-793-moederplantasie is opgedeel in steggies van 30 cm lengte. Die basale steggie is gesny vanaf die punt van aanhegting, met die tweede en derde steggie in opeenvolgende posisies nader aan die lootpunt. Die posisie... -
Effect of species, cutting position and exogenous rooting substances on rooting of honeybush (Cyclopia spp.) cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM Mbangcolo --- Department of Agronomy, South Africa EY Reinten --- Department of Agronomy, South Africa GA Agenbag --- Department of Agronomy, South AfricaEffect of the cutting position, terminal and subterminal, and rooting substance on the rooting of cuttings of two Cyclopia species (Cyclopia genistoides and C. intermedia) taken in winter, spring or summer was studied under controlled glasshouse conditions. Cuttings taken in... -
Effect of an organic plant fertiliser on the establishment of rooted cuttings of two species of Cyclopia (honeybush)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM Mbangcolo --- Department of Agronomy, South Africa EY Reinten --- Department of Agronomy, South Africa GA Agenbag --- Department of Agronomy, South AfricaThe effect of different application rates of an organic plant fertiliser (Nitrosol®) on the establishment and early growth of rooted cuttings of Cyclopia (Fabaceae) species was evaluated. Rooted terminal and subterminal cuttings of C. intermedia and C. genistoides were transplanted... -
Root volume and raising period affect field performance of Pinus patula cuttings in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell J. Zwolinski N. B. Jones A. D. BayleyThe propagation of pines through cuttings has become a commercial means of rapidly multiplying improved genetic material for operational use in forestry companies. Cuttings of pines are produced entirely in containers in South Africa. Containers, however, can negatively affect plant... -
Shoot morphology and site climate affect re-establishment success of Pinus patula in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell J. Zwolinski N. B. JonesOperational experience has indicated that Pinus patula generally survives poorly on sub-optimal growing sites in South Africa, particularly when planted as cuttings. This observation will become increasingly important as softwood species of genetically selected stock are deployed as cuttings in... -
The effects of ontogenetic maturation in Pinus patula – Part II: Hedge cycling and field performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell N. B. JonesEarly studies suggest that the juvenile period, during which favourable rooting can be achieved from Pinus patula seedling hedges, may be as short as 2 years from the date of sowing. If the effects of hedge maturation cannot be delayed,... -
A root-bound index for evaluating planting stock quality of container-grown pines
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D.B. South R. G. MitchellPot-binding can adversely affect the performance of container-grown stock. One factor that affects pot-binding is the size of the root system in relation to the size of the container. The aim of this study was to determine if an objective... -
Clonal propagation and storage of subtropical pines in Queensland, Australia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.J. TruemanClonal forestry is the approach used for deployment of Pinus elliottii × P. caribaea hybrids in Queensland, Australia. Clonal forestry relies on the ability to maintain juvenility of stock plants while selections are made in field tests, so that genetic... -
Cutting down very simple trees
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Alois PanholzerWe study here, by using a recursive approach, the number of random cuts that are necessary to destroy a random tree of size n for simply generated tree families. Crucial for the applicability of such a recursive approach is a... -
Influence of human disturbance on patterns of leaf herbivory at Gazi Bay mangrove forest, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CM Kihia --- Department of Biological Science, Kenya JM Mathooko --- Department of Biological Science, Kenya RK Ruwa --- , Kenya WA Shivoga --- Department of Environmental Science, KenyaMangrove herbivores cause leaf serration, perforation and galls prior to leaf abscission. This study compared damage by herbivores on leaves of four mangrove species at sites under different levels of human physical disturbance, and provides further evidence of the indirect... -
Reverting urban exotic pine forests to Macchia and indigenous forest vegetation, using cable-yarders on the slopes of Table Mountain, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Pierrre Ackerman --- Forest Engineering, Faculty of Agricultural and Forestry Sciences, South Africa Bruce Talbot --- Skov & Landskab, DenmarkThis paper discusses some ofthe issues faced during the initial phases of a 12-year long project, which will ultimately result in the transformation of 53 ha of urban pine forests to a more diverse natural vegetation cover. Public sentiment, harvesting... -
Early selection of Eucalyptus clones in retrospective nursery test using growth, morphological and dry matter criteria, in Republic of Congo
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Jean-Marc Bouvet --- , France Philippe Vigneron --- , France Rachel-Aubain Saya --- , République du Congo Raphaël Gouma --- , République du CongoWithin the framework of the eucalyptus breeding programme in the Congo, two retrospective tests were conducted using mature clones in the field and young cuttings under nursery conditions with two hybrids: 13 clones of Eucalyptus tereticornis* Eucalyptus grandis for the... -
Influence of the origin of stem cutting, season of collection and auxin application on the vegetative propagation af African Sandalwood (Osyris lanceolata) in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Z. Teklehaimanot --- School of Agricultural and Forest Sciences, UK P.L. Mwang'ingo --- Tanzania Forestry Research Institute, Tanzania A.G. Mugasha --- Department of Forest Biology, Faculty of Forestry and Nature Conversation, Tanzania C.K. Ruffo --- Tanzania Tree Seed Agency, TanzaniaAn investigation into the possibility of propagating O.lanceolata through stem cutting was carried out at Tanzania Tree Seed Agency, Iringa Zone, Tanzania. The aim was to test the potential of stem cuttings in providing an alternative/supplement to the use of... -
The effects of ontogenetic maturation in Pinus patula - Part 1: nursery performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell --- Sappi Forests Research, Africa J. Zwolinski --- Forestry Programme, Africa N. B. Jones --- Sappi Forests Research, AfricaThe age at which parent or donor hedges reach ontogenetic maturity has frequently been cited as a debilitating factor in the production of conifer cuttings. This point varies between species and prevailing environmental conditions. Among other things, a lack of... -
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... -
On the Placement of a Number of Strings in a Collection of Hats
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.P. Burger J.H. van VuurenThe following problem is considered in this paper: Suppose k strings of unit length are to be distributed amongst x hats. If cuts in the strings are allowed, how should the string (parts) be distributed amongst the hats so that,... -
The effect of cutting length on the rooting and growth of subtropical Eucalyptus hybrid clones in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: RD Naidu --- , South Africa NB Jones --- , South AfricaThe length of a cutting can affect both the rooting and plug colonisation of container-grown stock. Using hedges from conventional clonebanks established in the ground, four cutting length treatments (13, 10, 8 and 5 cm) were tested using five Eucalyptus... -
Attitudes towards female genital cutting among pregnant women in Owo, Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: CO Omolase --- Department of Ophthalmology, Federal Medical Centre, Nigeria OO Akinsanya --- Department of Obstetrics and Gynaecology, Federal Medical Centre, Nigeria SO Faturoti --- Department of Obstetrics and Gynaecology, Federal Medical Centre, Nigeria RS Omotayo --- Department of Obstetrics and Gynaecology, Federal Medical Centre, Nigeria BO Omolase --- Department of Radiology, Federal Medical Centre, NigeriaBackground: This study aimed to determine the attitudes of pregnant women attending the antenatal clinic at Federal Medical Centre, Owo, Ondo State, Nigeria, towards female genital cutting. -
Influence of growth media and regulators on vegetative propagation of rosemary (Rosmarinus officinalis L.)
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: P. Kiuru --- Kenya Agricultural Research Institute (KARI) Thika, Kenya S. J. N. Muriuki --- Kenya Agricultural Research Institute (KARI) Thika, Kenya S. B. Wepukhulu --- Kenya Agricultural Research Institute (KARI) Thika, Kenya S. J. M. Muriuki --- Kenya Agricultural Research Institute (KARI) Thika, KenyaRosemary (Rosmarinus officinalis) is a woody, perennial herb with fragrant evergreen needle-like leaves and a lovely fragrance. Leaves are finely chopped and used to flavour dishes. Rosemary propagation is done through either seed or stem cutting. Seeds of rosemary are... -
Clonal propagation of Pterocarpus santalinoides L'Hér. ex DC.: the effect of substrate, cutting type, genotype and auxin
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Catherine Ky-Dembele --- World Agroforestry Centre – West Africa and Central Regional Office - Sahel Node – BP, Mali Jules Bayala --- World Agroforestry Centre – West Africa and Central Regional Office - Sahel Node – BP, Mali Antoine Kalinganire --- World Agroforestry Centre – West Africa and Central Regional Office - Sahel Node – BP, Mali Fatoumata Tata Traoré --- World Agroforestry Centre – West Africa and Central Regional Office - Sahel Node – BP, Mali Bréhima Koné --- World Agroforestry Centre – West Africa and Central Regional Office - Sahel Node – BP, Mali Alain Olivier --- Université Laval, CanadaPterocarpus santalinoides is a multipurpose tree species, native to Africa and South America. However, excessive pruning for fodder is jeopardising its seed production leading to poor regeneration in the Sahel region. Efficient vegetative propagation techniques may overcome this concern. To... -
Growth and nutritional qualities of three ocimum species as affected by methods of propagation
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: A. I. Okunlola --- Department of Crop, Soil and Pest Management, Nigeria O. C. Ogungbite --- Department of Biology, Nigeria G. F. Hassan --- Department of Crop, Soil and Pest Management, NigeriaOcimum species are well known for their medicinal values and this has increased demand from individuals and the pharmaceutical industry. In order to meet the demand for this plant species three different Ocimum species (Ocimum basilicum, Ocimum gratissimum and Ocimum... -
Model for cutting force prediction in high precision single-point diamond turning of optical silicon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: M. K. O. Ayomoh --- Mechatronics Engineering Department, South Africa K. A. Abou-El-Hossein --- Mechatronics Engineering Department, South Africa O. A. Olufayo --- Mechatronics Engineering Department, South AfricaThis paper presents a mathematical model predicated on a finite series convergent scheme and derivative functions of multi-variants obtained from a cutting force constitutive equation for onward prediction of the maximum cutting force at the tip of a single-point diamond... -
The decline of an urban Hooded Vulture Necrosyrtes monachus population in Dakar, Senegal, over 50 years
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Wim C Mullié --- , Senegal François-Xavier Couzi --- Société d’Etudes Ornithologiques de la Réunion, France Moussa Sega Diop --- AfriWet Consultants, Senegal Bram Piot --- Cité Ndiatte Almadies, Senegal Theo Peters --- Royal Netherlands Embassy, Senegal Pierre A Reynaud --- 275 Rue Robert Schuman, France Jean-Marc Thiollay --- 2 Rue de la Rivière, FranceAs in many West African cities, in Dakar Hooded Vultures Necrosyrtes monachus have always been characteristic urban scavengers. The recent decline of Hooded Vultures in other parts of Africa, mainly eastern Africa, has been the reason in 2015 for up-listing... -
Effect of frequency and height of cutting on growth parameters of Acacia saligna in Egypt
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ahmed A Kandil --- Agronomy Department, Faculty of Agriculture, Egypt Ali E Sharief --- Agronomy Department, Faculty of Agriculture, EgyptTo revegetate acacia trees in saline desert sandy soils, field experiments were conducted to study the effect of cutting frequency and height on Acacia saligna productivity during 2014, 2015 and 2016. The tallest plants, thickest stems and highest values for... -
Propagation of Hypoxis hemerocallidea by inducing corm buds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Motiki M Mofokeng --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Riana Kleynhans --- Department of Horticulture, South Africa Lesego M Sediane --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Liesl Morey --- Agricultural Research Council–Biometry, Corporate Office, South Africa Hintsa T Araya --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South AfricaAfrican potato is facing rapid decline of wild populations due to large-scale harvesting, necessitating efficient means of propagation. Propagation of African potato is difficult due to seed dormancy and the species does not naturally propagate easily from corms. This study... -
The Effect of Provenance, Plant Spacing and Cutting Interval on Leaf Biomass Yield of Moringa Oleifera Lam.
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: C. T. Gadzirayi --- Bindura University of Science Education, Zimbabwe F. Kubiku --- Bindura University of Science Education, Zimbabwe J. Mupangwa --- University of Fort Hare, South Africa B. Masamha --- Bindura University of Science Education, Zimbabwe L. Mujuru --- Bindura University of Science Education, ZimbabweTwo provenances of Moringa oleifera Lam., Malawi and Mutoko, were evaluated to determine the effect of plant spacing and cutting interval on the leaf biomass yield for fodder production. A split-split plot experimental design was set up with provenance as... -
Vegetative propagation of Dalbergia tonkinensis, a threatened, high-value tree species in South-east Asia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nong Phuong Nhung --- Department of Training and International Cooperation, Vietnam Pham Quang Thu --- Forest Protection Research Centre, Vietnam Nguyen Minh Chi --- Forest Protection Research Centre, Vietnam Bernard Dell --- Murdoch University, AustraliaDalbergia tonkinensis (Fabaceae) is one of the most valuable rosewood furniture species in the world. Although all species of Dalbergia are now included in Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora,... -
Stem volume and tree biomass harvested by different thinning intensities from dense and sparse karee stands in Central Bushveld, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Kassahun T Maru --- Department of General Forestry, Wondo Genet College of Forestry and Natural Resources, Ethiopia Coert J Geldenhuys --- Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- SAFCOL Forest Chair for Forest Postgraduate Programme, Department of Plant and Soil Sciences, South AfricaThe aim of this study was to determine the aboveground stem volume and tree biomass of the multi-stemmed karee tree (Searsia lancea) for its potential use for producing wood chips and/or pellets. A stratified random sampling was done, by selecting... -
Leaf-cutting ants in commercial forest plantations of Brazil: biological aspects and control methods
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Germano Lopes Vinha --- , Brazil Ricardo Alcántara-de la Cruz --- , Brazil Terezinha Maria Castro Della Lucia --- , Brazil Carlos Frederico Wilcken --- , Brazil Edson Dias da Silva --- , Brazil Pedro Guilherme Lemes --- , Brazil José Cola Zanuncio --- , BrazilForest plantations represent the fourth largest crop by planted area in Brazil. However, leaf-cutting ants can compromise their establishment and development. Atta and Acromyrmex (Hymenoptera: Formicidae) ant genera are the main pests in Eucalyptus and Pinus plantations, and their management... -
Forage yield and quality response of Napier grass (Cenchrus purpureus) to different dry season harvesting management under the subhumid agroecology of western Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abuye Tulu --- Oromia Agricultural Research Institute, Ethiopia Mekonnen Diribsa --- Oromia Agricultural Research Institute, Ethiopia Worku Temesgen --- Oromia Agricultural Research Institute, EthiopiaA 3 × 2 factorial study was conducted in 2015, 2016 and 2017, to assess the impact of dry season cutting management on fodder yield and quality of Napier grass. Three harvesting times (November, January and March) and two stubble-... -
Rooting potential of the ‘vleitee’ honeybush (Cyclopia subternata) as affected by growth season and the manipulation of stock plant characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- Directorate Plant Sciences, South Africa --- Stellenbosch University, South Africa --- Stellenbosch University, South Africa --- Stellenbosch University, South AfricaTo ensure a high-quality, sustainable supply of South African indigenous honeybush (Cyclopia spp.) tea to domestic and international markets, a shift from wild harvesting practices to true-to-type clonal material is required. This study investigated the impact of stock plant rejuvenation... -
Growth, vegetative rescue and vegetative propagation in Eucalyptus species and hybrids
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Patrícia Fukushima de Souza --- Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias, Brazil Marcio Carlos Navroski --- Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias, Brazil Mariane Oliveira Pereira --- Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias, Brazil Marcos Felipe Nicoletti --- Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias, Brazil Ramon Silveira de Andrade --- Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias, BrazilThe objective of the study was the evaluation of survival and productivity indicators in different species/hybrids of Eucalyptus in the adult stage, as well as the vegetative rescue of adult trees and cuttings, testing for species/hybrids, concentration of growth regulator...