Rangeland Ecology & Management
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- Library Collection RecordA plant growth model has been developed as a component of a general rangeland production and utilization model (SPUR). The carbon and nitrogen content of standing green, live roots, propagules,…Publication Date 1988
- modelling
- rangelands
- animal production
- plant production
- management
- Africa
- Library Collection RecordNine plant growth models for grassland ecosystems were examined. Model objectives, complexity and inclusiveness were compared. A large degree of diversity in model complexity and structure exists in…Publication Date 1985
- grasslands
- modelling
- ecosystem dynamics
- grazing
- Africa
- Library Collection RecordAn extensive sensitivity analysis of a model for the Simulation of Production and Utilization on Rangelands (SPUR) was conducted. A perturb and observe approach was employed in a series of fractional…Publication Date 1985
- grasslands
- animal production
- animal nutrition
- plant production
- soil moisture
- grazing
- Soil Condition
- stocking rates
- Africa
- Library Collection RecordThe responses of East African grasses to defoliation at specific heights and frequencies were simulated mathematically over a single optimal growing season. The simulation model used morphological…Publication Date 1984
- plant production
- grazing
- plant autecology
- modelling
- Africa
- Library Collection RecordA model of litter decomposition in a South African savanna is described. Decomposing material is divided into a number of particle classes, distinguishing material of different ages, origins and size…Publication Date 1982
- ecology
- grasslands
- modelling
- ecosystem dynamics
- insects
- system ecology
- Africa
- Library Collection RecordThe growth and species structure of vegetation in relation to the proximity of termite (M. michaelseni) mounds was studied in a semi-arid savannah ecosystem during 1978-1980. The dry matter yield in…Publication Date 1982
- savanna
- ecosystem ecology
- biodiversity
- soils
- Africa
- Library Collection RecordAgricultural development is a complex undertaking because of the numerous factors involved, including those of a physical and non-physical nature. Land and water have often been (and are nowadays…Publication Date 1974
- agriculture
- land use
- management
- hydrology
- modelling
- Africa
- Library Collection RecordGenerally, Rb-Sr biotite and phlogopite ages range from ~ 2050 Ma to ~ 1950 Ma between the Murchison-Thabazimbi and Triangle-Tuli-Sabi shear zones of southern Africa in the rocks comprising the…Publication Date 1992
- Africa
- Library Collection RecordDuring the past decade, Africa, more than any other continent, has been associated with famine and malnutrition. The Sahelian drought of the early 1970s, the Wollo and Karamoja famines and most…Publication Date 1989
- nutrition
- Africa
- commoditization
- Africa
- Library Collection RecordPalaeoenvironmental records which include the interval between 11,000 and 10,000 BP have been investigated for 15 sites in South Africa. Less than half of them are well dated and have a resolution…Publication Date 1995
- palaeoclimate
- Africa
- Library Collection RecordThe temporal and spatial distribution of African savanna grassland fires has been examined, and the areal extent of these fires has been estimated for the subequatorial African continent. African…Publication Date 1994
- grasslands
- fire ecology
- GIS
- modelling
- Africa
- Library Collection RecordVegetation classification and mapping includes the following stages: stratification, sampling and classification followed by refinement and mapping. Stratification with the aid of aerial photography…Publication Date 1987
- mapping
- remote sensing
- Landsat images
- 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 RecordSince 1978 the U.S. Agency for International Development (USAID) has funded a regional remote sensing project for East and Southern Africa. The project, hosted by the Regional Centre for Services in…Publication Date 1984
- remote sensing
- Landsat images
- Africa
- Library Collection RecordThe author contends that Geographic Information System (GIS) technology can help lending institutions better understand the long-term consequences of economic development projects on African land and…Publication Date 1988
- GIS
- remote sensing
- agriculture
- economics
- 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 RecordAlthough ecological, economic and social conditions vary from country to country, the quandary of increasing pressure on limited tropical savanna resources is universal. This article reviews some of…Publication Date 1994
- savanna
- land use
- policies
- management
- decision support systems
- Africa
- Library Collection RecordThe two most critical African natural disasters, drought and locust outbreaks, are least understood in terms of the four activities considered essential to long-term disaster reduction: hazard…Publication Date 1991
- drought
- insects
- ecology
- hazard assessment
- ecosystem dynamics
- ecosystem ecology
- Africa
- Library Collection RecordLand use policy is often developed without regard to historical considerations, even though policy may fail because it is familiar to local people who have found it to be inaccurate and inappropriate…Publication Date 1989
- land use
- policies
- subsistence agriculture
- management
- decision support systems
- Africa
- Library Collection RecordThis article addresses the potential land use conflict between trees and cattle. The search for pasture frequently leads to the large-scale destruction of trees yet, paradoxically, when grazing land…Publication Date 1989
- cattle
- grazing
- pasture management
- communal farming
- land use
- management
- rangelands
- decision support systems
- sustainability
- Africa
- Library Collection RecordNo abstract availablePublication Date 1988
- soil
- erosion
- conservation
- Africa
- Library Collection RecordNo abstract availablePublication Date 1988
- land use
- mapping
- Africa
- Library Collection RecordThis article looks at desertification -- both on a global scale and as it relates to Africa. Desertification is defined here as the diminution or destruction of the biological potential of the land,…Publication Date 1986
- desertification
- drought
- food security
- Africa
- Library Collection Record
2324 Land use in Africa
With high and accelerating population growth and with low and declining efficiency in the use of resources, Africa is currently facing a long-term declining trend. Since agriculture accounted for 41…Publication Date 1986- Africa
- Library Collection RecordThe different approaches to control of weeds by biological methods are reviewed. The methods depend upon the techniques used and the control desired. These approaches are classified as follows: the…Publication Date 1989
- Weeds
- biological control
- augmentative
- inoculative
- Conservative
- broad spectrum
- Alien invasive species
- indigenous encroaching species
- management
- Africa
- Library Collection RecordSpatial and temporal subcontinental patterns of fire distribution in Africa, may vary strongly from year to year. These variations may be of climatic or anthropic origin. Global Area Coverage (GAC)…Publication Date 1995
- remote sensing
- fire ecology
- monitoring
- Africa
- Library Collection RecordCows are important agents of geomorphological change. On the uplands, heavy grazing compacts the soil, reduces infiltration, increases runoff, and increases erosion and sediment yield. However, light…Publication Date 1995
- cattle
- ecosystem dynamics
- Soil Condition
- runoff
- soil erosion
- grazing
- modelling
- Africa
- Library Collection RecordIn 1989, the opportunity was identified to create a botanical map series which could be used by authorities to make informed decisions and which would highlight the potential impact significance of…Publication Date 1996
- mapping
- conservation
- vegetation
- Coast
- South Africa
- development
- GIS
- management
- Africa
- Library Collection RecordIn the process of dredge mining, employed since 1977 on the Zululand coast, heavy minerals are extracted from the dunes after the complete removal of the existing vegetation. The tailings are then…Publication Date 1996
- Post-mining
- rehabilitation
- Dunes
- Zululand
- South Africa
- mine rehabilitation
- restoration ecology
- vegetation dynamics
- data analysis
- species richness
- Africa
- Library Collection RecordLake Baringo and its environs are an incongruous landscape, an archetypal example of landscape degeneration, a laboratory for scientific research and a playground for the moderately prosperous.…Publication Date 1990
- Africa
- Library Collection RecordStrains of Cynodon dactylon (L.) Pers. were collected from six different climatic localities in South Africa. Under controlled conditions the strains were submitted to various environmental stress…Publication Date 1990
- plant autecology
- grasslands
- management
- pasture management
- drought
- plant production
- Africa
- Library Collection RecordIn South Africa, organized dune stabilization began in 1845 in the western Cape with the introduction of Australian Acacia species which were regarded as the most useful plants for this process.…Publication Date 1989
- Alien invasive species
- ecosystem ecology
- economics
- fire
- indigenous species
- landscape ecology
- Africa
- Library Collection RecordThe Penman-Monteith equation is useful for computing evaporation rates of uniform surfaces, such as dense vegetation or bare soil. This equation becomes less useful for evaluation of evaporation…Publication Date 1996
- remote sensing
- Soil Condition
- evaporation
- grasslands
- ecosystem dynamics
- Africa
- Library Collection RecordA multiple-source surface energy balance model for use in general circulation models (GCMs) is developed. The model recognizes three biome architectures: closed canopies (e.g. forest), biomes with…Publication Date 1993
- ecology
- modelling
- soils
- agriculture
- Africa
- Library Collection RecordIt is important to know how the increasing atmospheric concentration of carbon dioxide (CO2) will affect growth of agricultural plants. The objective of this study was to determine the effect of…Publication Date 1992
- climate change
- carbon dioxide
- grasslands
- plant autecology
- plant production
- agriculture
- Africa
- Library Collection RecordPartitioning available energy between plants and bare soil in sparsely vegetated rangelands will allow hydrologists and others to gain a greater understanding of water use by native vegetation,…Publication Date 1992
- rangelands
- hydrology
- ecosystem ecology
- modelling
- Africa
- Library Collection RecordVegetative cover affects the spatial and temporal variability of heat and water in the soil. The ability to predict temperature and water conditions enhances our ability to evaluate management…Publication Date 1991
- modelling
- soils
- ecosystem dynamics
- ecosystem ecology
- 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 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 RecordCompared with monospecies stocking, numerous studies substantiate that multispecies stocking can efficiently increase use within and among the mosaic pattern of rangeland plant life forms. However,…Publication Date 1990
- rangeland
- livestock
- management
- diet selection
- foraging ecology
- cattle
- sheep
- vegetation dynamics
- Africa
- Library Collection RecordDifferences in grazing behavior among Hereford (HH), 50% Angus-50% Hereford (AH), 50% Simmental-50% Hereford (1S1H) and 75% Simmental-25% Hereford (3S1H) lactating cows grazing foothill range were…Publication Date 1988
- grazing
- cattle
- foraging ecology
- pasture management
- animal production
- rangelands
- Africa
- Library Collection RecordLearning early in life may play an important role in the development of dietary habits and foraging skills of domestic ruminants. In this review we (1) explore the theoretical and empirical bases of…Publication Date 1987
- diet selection
- foraging ecology
- livestock
- management
- Africa
- Library Collection RecordOn semi-arid rangelands, stems and other standing dead material may accumulate in bunch-grasses and restrict access to new growth by grazing animals. We found that the presence and heights of…Publication Date 1987
- grazing
- rangelands
- rangeland condition
- cattle
- foraging ecology
- diet selection
- Africa
- Library Collection RecordIn a series of three experiments, the effect of offering conserved forage indoors to grazing dairy cows was examined. In Experiment 1, hay was offered ad libitum for 45 min after morning milking. In…Publication Date 1986
- animal production
- animal nutrition
- forage quality
- Forage Quantity
- grazing
- diet selection
- cattle
- Africa
- Library Collection RecordYoung animals face unique constraints in foraging on rangelands. They are at an inherent disadvantage to older animals because they have higher nutritional requirements and they lack foraging…Publication Date 1986
- diet selection
- foraging ecology
- animal nutrition
- animal production
- goats
- rangelands
- Africa
- Library Collection RecordInvasive plants and plantations may be detrimental to native, ground-living, invertebrate fauna. Using pitfall traps at 20 sites in Pietermaritzburg, South Africa, an assessment was made of the…Publication Date 1996
- invertebrates
- native vegetation
- Invasive vegetation
- afforestation
- Alien invasive species
- ecosystem ecology
- Africa
- Library Collection RecordChromolaena odorata (L.) King & Robinson continues to spread through southeast Asia into the south Pacific, and into central and eastern Africa from the infestations in western and southern…Publication Date 1996
- Chromolaena odorata
- Siam weed
- Africa
- Asia
- Oceania
- Australia
- climate matching
- distribution
- Alien invasive species
- decision support systems
- Phytosociology
- management
- Africa
- Library Collection RecordSpatio-temporal variation in dung beetle distribution and cattle dung dispersal was quantified across a spectrum of summer rainfall habitat types in South Africa, i.e. grassland, open woodland and…Publication Date 1996
- Australia
- dung
- Pasture Improvement
- Scarabaeidae
- South Africa
- dung beetles
- ecosytem ecology
- soils
- rangeland condition
- rainfall
- grasslands
- Africa
- Library Collection RecordThis paper presents a structured research design to achieve an economically viable and ecologically sustainable land use. It includes the major elements required to achieve a predictive capability at…Publication Date 1996
- adaptive management
- Ecological economics
- landscape ecology
- rangelands
- Sustainable utilisation
- Economic Aspects
- Systems research
- Sustainable development
- management
- Africa
- Library Collection RecordChromolaena odorata (L.) King & Robinson, a perennial, semi-woody, herbaceous scrambling shrub of neotropical origin, is an invasive weed of agriculture, forestry and conservation in many parts…Publication Date 1996
- Chromolaena odorata
- distribution
- integrated control
- management
- Weeds
- invasive plants
- Alien invasive species
- herbicides
- biological control
- Africa
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