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Partitioning, storage and remobilization of 14C assimilated by Themeda triandra Forssk1
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), Republic of South Africa A.J. Gordon --- , United KingdomThe second youngest fully‐expanded leaf on the main tiller of vegetative Themeda triandra plants was exposed to 14CO2. Thereafter, quantitative analysis of partitioning, storage and remobilization after defoliation of 14C‐labclled assimilate was conducted in serially‐harvested plants over a 27‐day period... -
Influence of temperature during the preceding growth period of lucerne on its regrowth at different temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Greenfield --- Department of Agronomy, United States of America Dale Smith --- Department of Agronomy, United States of AmericaOne-year-old lucerne (Medicago sativa L. cv. ‘Vernal’) plants were grown to first flower through three cuttings in three temperature regimes, H (33°C day/24°C night), W (27718°C) and C (21712°C), to ascertain the influence of temperature preceding defoliation on subsequent growth... -
The effects of kelp harvesting on its regrowth and the understorey benthic community at Danger Point, South Africa, and a new method of harvesting kelp fronds
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: G. J. Levitt R. J. Anderson C. J. T. Boothroyd F. A. KempAt Danger Point, South Africa, mariculture of the abalone Haliotis midae has led to increased demand for freshly harvested kelp Ecklonia maxima. This study estimates the biomass of E. maxima available for harvesting, investigates the effects of harvesting on the... -
Research note: Quantification of the effects of defoliation on grass vigour
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: K.P. Kirkman --- Department of Agriculture, Republic of South Africa A. Moore --- , Republic of South AfricaThe quantification of defoliation effects on grass vigour is important in understanding veld response to differential management. Effect of grazing on vigour can be determined by measuring regrowth during the season following grazing and comparing treatments with an undefoliated control... -
Control of Eucalyptus grandis cut-stumps of single-stem origin
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K.M. Little --- , Republic of South Africa N.S. Eccles --- , Republic of South AfricaFour methods to control coppice re-growth on single-stem cut-stump Eucalyptus grandis stools were tested in the Zululand region of KwaZulu-Natal. The methods used were the burning of the plantation residue as opposed to a no-burn control, the application of triclopyr... -
Coppicing potential of Eucalyptus nitens: Results from a field survey
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K. M. Little --- , South Africa G. van den Berg --- , South Africa G. Fuller --- , South AfricaIn order to determine factors which could have a positive influence on the coppicing potential of Eucalyptus nitens, a field survey was carried out at Draycott, near Estcourt in the KwaZulu-Natal Midlands. Five measures ofthe ability to coppice (stump survival,... -
Killing Eucalyptus grandis cut stumps after multiple coppice rotations in the KwaZulu-Natal midlands, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Keith M. Little --- , Republic of South AfricaThe repeated regeneration of Eucalyptus grandis through the managementofcoppice shoots results inlarge multi-stemmed stumpsthat are difficult to kill To test the most effective mannerinwhichthese stumps could be killed, a trial wasinitiated at felling on a fourth rotation stand of E... -
The use of species–stem curves in sampling the development of the Zambian miombo woodland species in charcoal production and slash-and-burn regrowth stands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: S Syampungani --- School of Natural Resources, Zambia CJ Geldenhuys --- Department of Forest and Wood Science, South Africa PW Chirwa --- Faculty of Natural and Agricultural Sciences, South AfricaThe use of fixed-area plot methods was considered unsuitable to compare the responses and recovery over time of different miombo woodland species to different land-use practices (i.e. charcoal production and slash-and-burn agriculture). Young regrowth stages have many stems and the... -
Conceptual decision-making framework for the sustainable harvesting of forest and woodland species for medicinal tree bark in southern Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: WJ Vermeulen --- , South Africa CJ Geldenhuys --- , South Africa KJ Esler --- , South Africa S Syampungani --- , Zambia G Meke --- , MalawiTree bark is widely used in traditional medicine in southern Africa. The growing demand for medicinal bark requires scientifically sound harvest systems for sustainable use. A conceptual framework and decision matrix are presented to aid forest managers in selecting the...