Rangeland Ecology & Management
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Displaying 151 - 169 of 169 results
- Library Collection RecordFour deterministic rainfall-runoff models are briefly described and applied to a small (0.18 km2) grassland catchment in the Eastern Cape Province of South Africa. The models vary in complexity, from…Publication Date 1994
- rainfall
- runoff
- soil erosion
- grasslands
- modelling
- Africa
- Library Collection RecordIn semi-arid and arid magisterial (administrative) districts (n = 45) in the Cape Province, South Africa, there has been a mean 44·4 ± 14·6% (S.D.) reduction in the stocking rates of domestic…Publication Date 1994
- livestock
- animal production
- stocking rates
- rainfall
- drought
- socio-economic aspects
- Africa
- Library Collection RecordUsing the methods of direct gradient analysis, we investigated some of the factors responsible for species turnover in the dwarf shrubland/grassland interface of the eastern half of the Nama-Karoo…Publication Date 1994
- grasslands
- soil moisture
- species richness
- rainfall
- environmental factors
- climate change
- management
- Africa
- Library Collection RecordAn analysis tool was developed to simulate primary productivity and crop yields for both present and possible future climate conditions. Southern Africa was delineated into 712 relatively homogeneous…Publication Date 1993
- plant production
- agriculture
- climate change
- soil
- vegetation dynamics
- hydrology
- modelling
- GIS
- rainfall
- socio-economic aspects
- policies
- food security
- Africa
- Library Collection RecordThe advantages of incorporating variable length time steps into deterministic hydrological models are discussed and a method based on the use of rainfall thresholds to determine appropriate length…Publication Date 1993
- hydrology
- rainfall
- modelling
- grasslands
- Africa
- Library Collection RecordThe physiognomy of dry savannas is described as a combination of discontinuous woody perennials and a continuous grassland matrix. Interactions between these two components are of vital importance…Publication Date 1992
- Herb composition
- herbaceous production
- microclimate
- nitrogen fixation
- Soil amelioration
- vegetation dynamics
- savanna
- grasslands
- landscape ecology
- soil nutrients
- rainfall
- Africa
- Library Collection RecordIn this paper, the second part of a two-part series, the performance of a quasi-physically based rainfall-runoff model (QPBRRM) is evaluated for a set of 39 events from a small rangeland catchment (R…Publication Date 1992
- rainfall
- runoff
- rangelands
- soil moisture
- modelling
- ecology
- Africa
- Library Collection RecordThis paper, the first part in a two-part series, is concerned with the interpretation of spatial and temporal variations in soil water content across a small rangeland catchment; two data sets are…Publication Date 1992
- rainfall
- runoff
- rangelands
- soil moisture
- modelling
- Africa
- Library Collection RecordThree years of weekly measurements of surface runoff and sediment yield from two small plots in a dune terrain along the Dutch coast have been used to model water erosion. The measurements of the…Publication Date 1991
- runoff
- rainfall
- erosion
- modelling
- Soil Condition
- Africa
- Library Collection RecordThe numbers of dead cattle in 1977/1978-1985/1986, expressed as a percentage of the total cattle numbers, for six regions in Botswana and for the country as a whole, were analysed as a function of a…Publication Date 1990
- cattle
- water use efficiency
- drought
- rainfall
- modelling
- soil moisture
- Africa
- Library Collection RecordInformation from the literature about forage conservation losses in the field has been reviewed, contrasted and analysed in the categories respiratory loss, leaching loss and mechanical loss. An…Publication Date 1989
- forage quality
- conservation
- agriculture
- modelling
- temperature
- rainfall
- Africa
- Library Collection RecordRangeland areas are characterized by sparse and limited hydrological data that make the use of existing mathematical runoff models difficult and impractical. A simple rational mathematical model was…Publication Date 1989
- Runoff modeling
- Hydrological modeling
- Runoff simulation
- Snowmelt modeling
- rangeland hydrology
- modelling
- rainfall
- rangelands
- runoff
- Africa
- Library Collection RecordBotanical data were collected for the period 1970 to 1985 from the experimental farm unit at Massakloutjie in the Kalahari duneveld of the north?western Cape Province (Veld type no. 16a4, Acocks,…Publication Date 1987
- rainfall
- basal cover
- botanical composition
- stocking rate
- Net Income
- Africa
- Library Collection RecordNOAA-6 and NOAA-7 Advanced Very High Resolution Radiometer (AVHRR) global-area coverage (4 km ground resolution) data were obtained at three-day intervals throughout each of the four-month periods…Publication Date 1987
- remote sensing
- NOAA
- rainfall
- drought
- modelling
- Africa
- Library Collection RecordPasture production not only depends on precipitation amount and distribution patterns, but also on soil type and evaporative demand. The simulation model of Rose et al., developed using improved…Publication Date 1987
- pasture management
- fertilizer
- rainfall
- soil classification
- modelling
- Africa
- Library Collection RecordSummary Small dome-shaped hills are recurrent and common landforms associated with plateau surfaces in the savanna woodland landscapes, both to the north and south of the Congo Basin. They may be…Publication Date 1979
- insects
- savanna
- climate change
- ecology
- rainfall
- fire
- Africa
- Library Collection RecordRainfall variability and stocking rate in extensive ranching regions in the Northwestern Transvaal, South Africa, can have substantial influence on feed availability per animal and thus on beef…Publication Date 1979
- rainfall
- stocking rates
- rangelands
- animal nutrition
- animal production
- modelling
- Economic Aspects
- Africa
- Library Collection RecordThree algebraic infiltration equations (Kostiakov's, Horton's and Philip's) were examined to determine which one would best fit infiltrometer data collected from a variety of mostly…Publication Date 1976
- rainfall
- rangelands
- hydrology
- Africa
- Library Collection RecordSummary This paper presents a description of the temporal and spatial distribution of rainfall within the Serengeti Ecosystem, Tanzania. Ecosystem and Regional patterns are discussed with respect to…Publication Date 1975
- rainfall
- ecosystem dynamics
- ecosystem ecology
- vegetation dynamics
- Africa