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Ontogeny of Themeda triandra tillers in the false thornveld of the eastern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), A.J. Aucamp --- Department of Agriculture (Eastern Cape Region), L.P. Du Toit --- Department of Agriculture (Eastern Cape Region),Marked populations of Themeda triandra tillers were sequentially sampled at fortnightly intervals under normal conditions and without moisture stress respectively, covering a period from tiller initiation through to senescence after flowering. Parameters recorded were height of shoot apex, tiller mass,... -
The dynamics of Themeda Triandra tillers in relation to burning in the natal Drakensberg
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.S. Everson --- Department of Environment Affairs, TheresaM. Everson --- Department of Environment Affairs, N.M. Tainton --- Department of Grassland Science,Marked tillers of Themeda triandra were sampled regularly over a two year period in Highland Sourveld burnt annually in winter, biennially in spring and after a single summer and early winter burning treatment. Parameters recorded were height of shoot apex,... -
Yield and morphological responses of a forage sorghum to mefluidide
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D I Bransby --- , A G Matches --- , USA C R Richardson --- , USADue to rapid growth, stem build‐up in forage sorghum crops often leads to considerable wastage by animals and consequent loss of production. In this study the potential of the chemical plant growth regulator, mefluidide, for modifying the morphology of forage... -
The influence of tiller age and time of year on the growth of Themeda tri andra and Sporobolus fimbriatus in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region),Sequential growth measurements were made on successive populations of Themeda triandra and Sporobolus fimbriatus tillers initiated at different times of the year. The independent influences of tiller age and time of year on tiller growth were isolated by deriving growth... -
The influence of nitrogen fertilization, spring burning and height of stubble on hay and seed production of eragrostis curvula 1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.F.G. Rethman --- Department of Plant Production, B.H. Beukes --- Department of Agriculture & Water Supply,This investigation, conducted over a three‐year period, emphasized the strong effect of nitrogen fertilization on both hay and seed production. The optimum level of nitrogen, for conditions on the Eastern Highveld being 100–150 kg N/ha applied in spring, followed by... -
The effect of severe drought and management after drought on the mortality and recovery of semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), G.C. Stuart‐Hill --- Department of Agriculture (Eastern Cape Region),The False Thornveld of the Eastern Cape experienced a particularly intense drought during the 1982/83 growing season. Extensive grass mortality took place during the drought. After the drought, recovery was particularly sensitive to the post‐drought management treatment applied. Veld that... -
The effect of frequency of defoliation on themeda triandra in the false Thornveld of the Eastern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture and Water Supply (Eastern Cape Region), L.O. Nel --- Department of Agriculture and Water Supply (Eastern Cape Region),Tufts of Themeda triandra were subjected to different frequencies of defoliation during a single season under irrigated and non‐irrigated conditions. Frequent defoliation (> 5 times per year) severely reduced clipped yield on both moisture treatments. On irrigated treatments, root mass... -
Response of Cymbopogon validus tillers to three clipping frequencies
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: SheonaE. Shackleton --- Department of Botany, Transkei M.T. Mentis --- Department of Botany, Republic of South AfricaThe response of tagged Cymbopogon validus tillers to three clipping frequencies indicated that this species is intolerant of severe and frequent defoliation. This could account for its decreased abundance in heavily‐grazed areas in and around Mkambati Game Reserve, Transkei. -
Spruitvorming by mielies: 'n Vergelyking van enkelstammige en spruitvormende plante
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.F. Verwey --- Departement Plantproduksie, Republiek van Suid-Afrika P.S. Hammes --- Departement Plantproduksie, Republiek van Suid-AfrikaDie groei en opbrengs van enkelstammige en meerstammige mielieplante uit dieselfde stand is vergelyk om vas te stel wat die effek van spruitvorming hierop is. Spruitontwikkeling het nie 'n wesentlike invloed op planthoogte en blaaroppervlakte van hoofstamme gehad nie. Spruite... -
The effect of plant density on the injuriousness of Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , Republic of South Africa J. B.J. van Rensburg --- , Republic of South Africa J.H. Giliomee --- Department of Entomology and Nematology, Republic of South AfricaThe influence of five different plant densities on whorl damage, internal damage, tillering and yield of grain sorghum under attack by Busseola fusca was evaluated over two seasons, using artificial infestation of three egg batches (90 eggs) per 5-m row... -
The effect of soil fertility on the contribution of main stem, tillers and kernel position to grain yield and grain protein content of wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.A. Metho --- Department of Plant Production and Soil Science, Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South Africa E.A. Beyers --- Department of Plant Production and Soil Science, Republic of South AfricaThe relative contribution of main stems and tillers, as well as the relative contribution of first, second and third kernels in spikeiets to grain yield and grain protein content, is seldom quantified. The grain yield of main stems, tillers and... -
The harvest index of individual ears of four South African wheat (Triticum aestivum L.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.A. Metho --- Department of Agriculture and Environmental Affairs KwaZulu-Natal, Technology Development and Training (FSR), Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaIncreasing the harvest index is a major route to higher yields in regions where a crop has had a lengthy period of selection and adaptation. No information could be found on differences in the harvest indices of the main stems... -
Seasonal and varietal effects on tiller population development of sugarcane (Saccharum Officinarum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Zhou --- , M.D. Shoko --- , ZimbabweTillers carry leaves, determine leaf area index and indirectly influence the amount of photosynthetically active radiation (PAR) intercepted by the sugarcane canopy. Tillers develop into stalks, the sink for the products of photosynthesis. The objective of this study was to... -
Effects of selective defoliation and height of defoliation on tiller dynamics and herbage yield of Themeda triandra in a semi-arid rangeland in Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S. Dube V.E.E. GwarazimbaUnderstanding the impacts of intensity and selection of grazing on the performance of grasses is important in the management of grazing areas. It is especially important in semi-arid environments where, apart from moisture, the levels at which grasses are utilized... -
Effects of sowing rate on growth and protein contents of wall barley (Hordeum murinum L.) grown under Mediterranean conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M K J El-Shatnawi M Turk H M SaoubAccurate control of the seeding rate favours the establishment of a high-quality stand. Improper seeding rates waste seed and reduce potential yield. Our objective for this research is to determine the proper sowing rate for wall barley (Hordeum murinum L.)... -
Effect of management factors on tiller dynamics in tall fescue: Tiller initiation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Cumming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), nitrogen (N) fertilization, cultivar choice and close‐down date on tiller initiation in tall fescue (Festuca arundinacea Schreb.), managed for seed production, was examined over two years. In the first season,... -
Effect of management factors on tiller dynamics in tall fescue: Tiller mortality
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Dimming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), cultivar choice, nitrogen (N) fertilization and close‐down date on tiller mortality in a dual purpose (forage and seed) tall fescue (Festuca arundinacea Schreb.) sward was examined over a two‐year period... -
Effect of management factors on tiller dynamics in tall fescue: Numbers of tillers reaching reproductive maturity
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Cumming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), cultivar choice, nitrogen (N) fertilization and close‐down date on the number of reproductive tillers surviving to maturity in tall fescue (Festuca arundinacea Schreb.) was examined over a two‐year period. A... -
Influence of grazing frequency and intensity on aerial and reproductive tillering in Lolium perenne L. under subtropical conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F.R. McKenzie --- Department of Grassland Science, Republic of South AfricaReproductive and aerial tillering dynamics in Lolium perenne L. (perennial ryegrass) was monitored for two years under grazing. Reproductive tillers were observed from winter (June) to midsummer (February) with the main period of initiation occurring in spring to early summer... -
The influence of sowing rate on the production and growth of wild oat (Avena fatua) in the depleted semi-arid rangelands of Jordan
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.K.J. El-Shatnawi H.Z. GhoshehThe objective of this work was to determine the proper sowing rate of wild oat (Avena fatua) in the depleted north-eastern semi-arid grasslands of Jordan. Wild oat seeding rates of 15, 30, 45 and 60 kg ha−l were evaluated in... -
Early survival and growth of vegetatively propagated indigenous grasses in a clear-felled timber plantation in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JCO du Toit --- School of Biological and Conservation Sciences, South AfricaTransformation of natural landscapes can result in the local extinction of many plant species. If the new land use is discontinued, many original species will not recolonise the area, necessitating their reintroduction for rehabilitation purposes. One method is to fragment... -
Growth and tiller production of Themeda triandra as affected by NPK fertilisation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Justin CO du Toit --- Grootfontein Agricultural Development Institute, South AfricaThemeda triandra Forssk. is a common perennial grass in southern African grasslands that tolerates low nutrient soils. Establishment of the species into degraded or transformed areas is difficult, but there have been some advances with clonal propagation using tillers. To... -
Post-fire vegetative recruitment of the alien grass Glyceria maxima at a KwaZulu-Natal Midlands dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LF Mugwedi --- School of Animal, Plant and Environmental Sciences, South Africa JM Goodall --- School of Animal, Plant and Environmental Sciences, South Africa ETF Witkowski --- School of Animal, Plant and Environmental Sciences, South Africa MJ Byrne --- Centre of Excellence for Invasion Biology, South AfricaAn accidental fire at a site where the reproductive behaviour of Glyceria maxima was being investigated provided an opportunity to measure its effect on G. maxima vegetative recruitment. The fire burned G. maxima growing along the water's edge and down... -
Tiller population dynamics in eight cultivars of elephant grass during undisturbed growth
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: José A Rueda --- Licenciatura en Zootecnia, Mexico Eusebio Ortega-Jiménez --- Colegio de Postgraduados, Mexico Javier F Enríquez-Quiroz --- Campo Experimental “La Posta”, Mexico Rogelio E Palacios-Torres --- Licenciatura en Zootecnia, Mexico Sergio Ramírez-Ordoñes --- Licenciatura en Zootecnia, MexicoThe aim of the study was to assess tiller population dynamics of aerial and basal tillers in eight cultivars of Pennisetum purpureum (Schumach.), syn. Cenchrus purpureus (Schumach.) Morrone, in a warm humid climate in Veracruz, Mexico. This is a pioneer...