Rangeland Ecology & Management
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- Library Collection RecordDescription not available.Publication Date 1972
- Africa
- Library Collection RecordDescription not available.Publication Date 1972
- Africa
- Library Collection RecordA system of classification of the biotic communities of the world, taking into account vegetation, flora, and fauna, is needed for purposes of global conservation of species and ecosystems. In this…Publication Date 1972
- ecosystems
- conservation areas
- classification
- biodiversity
- national parks
- Africa
- Library Collection RecordDescription not available.Publication Date 1971
- Africa
- Library Collection RecordWherever civil engineering construction is carried out soil is denuded of vegetation. To prevent soil erosion these areas must be revegetated in the shortest possible time. Recently advances have…Publication Date 1971
- Africa
- Library Collection RecordAn optical method for measuring canopy?spread cover of shrubs is described by means of an illustrated example. Boundaries of plots are hypothetical lines joining the centres of wholly visible shrubs…Publication Date 1971
- Africa
- Library Collection RecordThe relative frequency of occurrence of plants (or plant parts) is determined at increasing distances from a focus, where the relative frequency is unity. The area under the resulting frequency/…Publication Date 1971
- Africa
- Library Collection RecordA mathematical model of the change in quantity of forage during grazing is constructed, assuming (1) that forage requirement by grazing animals is constant, and (2) that intake is equal to…Publication Date 1971
- Africa
- Library Collection RecordThemeda triandra tillers were examined microscopically at one to two?weekly intervals to determine where starch was deposited. Large numbers of starch grains were always present but the position of…Publication Date 1971
- Africa
- Library Collection RecordA theoretical mathematical model for describing crop photosynthetic rate in terms of the weather variables and crop characteristics is proposed. The model utilizes a series of efficiency parameters,…Publication Date 1971
- Africa
- Library Collection RecordA theoretical mathematical model for describing photosynthesis in individual leaves in terms of weather variables is proposed. The model utilizes a series of efficiency parameters, each of Which…Publication Date 1971
- Africa
- Library Collection RecordThe health of animals grazing on pastures is affected by the mineral content of fodder plants. The mineral content of any pasture species may vary within very wide limits and is profoundly influenced…Publication Date 1971
- Africa
- Library Collection RecordPrior to 1962 it was thought that 90 to 135 kg N per ha annually gave satisfactory yields of grass herbage. Grasses were consequently selected for their productivity with this amount of applied…Publication Date 1971
- Africa
- Library Collection RecordSown pastures of Paspalum dilatatum (and other species) in Natal are subject to degradation by Eragrostis plana (mshiki) invasion. The ratio between these two grasses, growing together in small plots…Publication Date 1971
- Africa
- Library Collection RecordFrequent clipping of Dactylis glomerata after 15?, 30? and 45?day regrowth periods showed that higher foliage yields and better root development are obtained after the longer periods of regrowth.…Publication Date 1971
- Africa
- Library Collection RecordAspects of the utilization and palatability (acceptability) of the drought fodder, Kochia brevifolia, were investigated, using Merino and Dorper wethers. The plant is not readily eaten by sheep, but…Publication Date 1971
- Africa
- Library Collection RecordInadequacies evident in present?day farm planning procedures require that attention be given to land classification ? the starting point of land?use planning. It is suggested that soils, correctly…Publication Date 1971
- Africa
- Library Collection RecordAn experiment was carried out to determine the effect of tilling and sowing of Eragrostis curvula on the botanical composition and production of severely damaged veld. Tilling and sowing was carried…Publication Date 1971
- Africa
- Library Collection RecordIn a series of investigations from 1965 to 1970 on the Transvaal Highveld it was found that trie elevation of shoot apices of two ecotypes of Themeda triandra was affected by season, ecotype and…Publication Date 1971
- Africa
- Library Collection RecordThe vegetational changes in 32 plots of bushmangrass veld which had been grazed for four years at specific seasons of the year, were determined by means of the widely?spaced point method. The effect…Publication Date 1971
- Africa
- Library Collection RecordIn a pasture experiment started early in 1967 on the Nortier Experimental Farm, a 4?camp grazing system with an overall stocking rate of 4,3 ha/small stock unit (SSU) per year and a stocking density…Publication Date 1971
- Africa
- Library Collection RecordSheep to cattle ratio experiments carried out over a period of 12 years at the erstwhile Athole Agricultural Research Station are described. Fourteen treatments were applied consisting of six…Publication Date 1971
- Africa
- Library Collection RecordThe effects of various methods of utilizing summer spared sourveld were investigated on two sites at the Döhne Agricultural Research Institute. A grazing trial was conducted where the utilization…Publication Date 1971
- Africa
- Library Collection RecordNorth?Eastern Sandy Highveld was utilized selectively by sheep grazing alone in winter with a supplementary lick. Winter utilization in four consecutive years had no detrimental effect on production…Publication Date 1971
- Africa
- Library Collection RecordThe objects of various types of rests which may be applied to grassveld are analysed and an attempt is made to define the different types of rests which are at present in use. These are categorized…Publication Date 1971
- Africa
- Library Collection RecordA statistical analysis of species/habitat data from 521 sites in the Orange Free State is presented with a view to establishing relationships for use in aerial photograph interpretation. Quantitative…Publication Date 1971
- Africa
- Library Collection RecordIn each of two seasons the growth form of Senecio retrorsus plants in Natal Tall Grassveld differed in accordance with the degree of utilization of the grasses and thus the degree of competition…Publication Date 1971
- Africa
- Library Collection RecordOn the Amatole mountains of the Eastern Cape Province extensive tracts of grassveld have been invaded by Macchia (Fynbos) vegetation and rendered agriculturally unproductive. Two distinct Macchia…Publication Date 1971
- Africa
- Library Collection Record
2479 Presidential address
Description not available.Publication Date 1971- Africa
- Library Collection Record
2480 Opening address
Description not available.Publication Date 1971- Africa
- Library Collection RecordOf all the continents, Africa has the highest proportion of land fit for agriculture. The principal vegetative cover on this land is grass, which, when it is well managed, gives good protection…Publication Date 1971
- grasslands
- management
- socio-economic aspects
- subsistence agriculture
- pastoralism
- Africa
- Library Collection RecordThis paper discusses the basic relationship between the dietetic needs of pastoral people, the number of stock they must keep to supply these needs, and the productive capacity of the environment.…Publication Date 1971
- Africa
- Library Collection RecordThe use of anatomical features of the abaxial epidermis of grasses is discussed for the identification of fragments of epidermis present in samples of rumen. The reliability of this technique, and…Publication Date 1970
- Africa
- Library Collection RecordPreliminary results of a long?term study of seasonal variation in grassland basal cover are presented. Seasonal stability appears to have been taken for granted but has not yet been shown…Publication Date 1970
- Africa
- Library Collection RecordRunoff and soil loss from veld treated in various ways was measured over a ten?year period on a sandy soil with a 4 per cent slope in south?western Rhodesia. The runoff as a percentage of the mean…Publication Date 1970
- Africa
- Library Collection RecordAdvice on veld management generally assumes that the productivity of veld can be improved by management. There is thus a need in agricultural extension work, where botanical surveys are impractical,…Publication Date 1970
- Africa
- Library Collection RecordReadings with an electronic capacitance instrument were compared with yields from the same areas in natural veld of different heights, and from a grass?clover pasture. The regression of meter reading…Publication Date 1970
- Africa
- Library Collection RecordThe relative preference of ten common Karoo bush species, in pellet form, was determined by offering the pellets to Merino ewes in random fashion in a small paddock. The nature of visits, i.e.…Publication Date 1970
- Africa
- Library Collection RecordA series of trials showed that differences in hay yield of four cultivars of Eragrostis curvula (Ermelo, American Leafy, Kromdraai and Witbank) depended largely on the cultivar concerned and the…Publication Date 1970
- Africa
- Library Collection RecordA survey is made of some pasture developments in Australia and New Zealand with particular reference to sod?seeding techniques, lucerne grazing management, aerial oversowing and overdrilling of…Publication Date 1970
- Africa
- Library Collection RecordIn a pot experiment with the A1 (topsoil) and B2 (subsoil) horizons of a Clovelly soil, it was found that although increasing the rate of band?placed lime from 265 to 2650 kg per ha did not…Publication Date 1970
- Africa
- Library Collection RecordIn a series of experiments designed to test the use and efficiency of paraquat (when applied as Gramoxone) in controlling the growth of veld grasses in the Ngongoni Sourveld, it was shown that when…Publication Date 1970
- Africa
- Library Collection RecordIn two pot experiments radioactive paraquat was applied to certain important veld grasses (Experiment I ? Aristida junciformis, Themeda triandra, Elyonurus argenteus, Andropogon filifolius,…Publication Date 1970
- Africa
- Library Collection RecordThe effects of applications of biuret to Digitaria swazilandenis, Cynodon dactylon, Eragrostis curvula and sugarcane are described. Slight leaf tip?burn was observed in the cases of the Digitaria,…Publication Date 1970
- Africa
- Library Collection RecordThe most important results of thirteen fertilizer experiments on veld, extending over periods of five to twenty years, are dealt with. In general, with nitrogen fertilization climax grasses were…Publication Date 1970
- Africa
- Library Collection RecordThe influence of four important bushveld trees, Acacia Senegal, Acacia tortilis, Boscia albitrunca and Combretum apiculatum on the distribution and productivity of Panicum maximum, was investigated.…Publication Date 1970
- Africa
- Library Collection RecordIn the Robertson Karoo eight plant communities can he distinguished. Quantitative plant surveys were conducted in all the communities. Succulents form an important component of the vegetation. The…Publication Date 1970
- Africa
- Library Collection RecordIt appears that in the Molopo area factors other than veld management probably have a considerable influence on veld production and veld reclamation. The philosophy of veld reclamation by management…Publication Date 1970
- Africa
- Library Collection RecordFactors mainly responsible for limiting animal production in the Molopo ranching area are the poor grass species composition of the veld, bush encroachment, droughts and the poor fertility status of…Publication Date 1970
- Africa
- Library Collection RecordGeigeria poisoning (vermeersiekte) has been a serious problem to stock farmers in Griqualand West for more than a century. As yet no promising method of combating the disease by veterinary treatment…Publication Date 1970
- Africa
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