Rangeland Ecology & Management
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- Library Collection RecordDisease of domestic animals on rangelands is caused by a wide variety of agents (some infectious and some non-infectious). Disease is primarily a function of the ecosystem, where a shift in the…Publication Date 1992
- livestock
- disease
- rangelands
- ecosystem ecology
- economics
- Africa
- Library Collection RecordILCA's overall aim is to improve human welfare and food supplies in Africa. Increased livestock production provides the cash income so essential for increases in food grain production in a part…Publication Date 1984
- Africa
- Library Collection RecordPopulation pressures within southern Africa are forcing people to increasingly crop land of a diverse and fragile nature where the risk of environmental degradation is high and current yields are low…Publication Date 1993
- soil moisture
- no-till
- climate
- Soil Condition
- soil fertility
- socio-economic aspects
- communal farming
- Africa
- Library Collection RecordIntroduction of mechanized agriculture induces profound changes in soil characteristics. Soil compaction originating from mechanical land clearing, mechanized cultivation, and continuous cropping is…Publication Date 1993
- Soil Condition
- no-till
- management
- rehabilitation
- ecosystem ecology
- Africa
- Library Collection RecordThe Karoo Sequence spans an age ranging from Carboniferous to Jurassic and occurs in intra-cratonic and graben-rift basins throughout southern Africa. All of the subcontinent 039;s bituminous,…Publication Date 1990
- plant anatomy
- palaeoecology
- grasslands
- palaeobotany
- Africa
- Library Collection RecordPetrographical and palynological coal-quality investigations relating to variations in one of the best-known and well-researched coalfields in Africa, the Witbank coalfield, and one of the most…Publication Date 1989
- palaeobotany
- Africa
- Library Collection RecordOne of the major diseases affecting human beings and livestock in Africa, trypanosomiasis--known in its common human form as sleeping sickness--remains resistant to general eradication, a wide belt…Publication Date 1979
- disease
- livestock
- insects
- economics
- ecology
- Africa
- Library Collection RecordIntroduction of international tourism as a development stimulus or tool in sub-Saharan Africa is relatively recent. In the context of Kenya, tourism development, in volume and value terms,…Publication Date 1991
- international tourism
- tourism planning
- tourism development
- Africa
- developing countries
- Kenya
- policy issues
- Africa
- Library Collection RecordThe characteristics and dynamics of dry savanna vegetation cover are receiving considerable attention from the perspectives of both global change and range degradation studies. Problems include the…Publication Date 1996
- savanna
- remote sensing
- mapping
- management
- degradation
- grazing
- Africa
- Library Collection RecordThe large human and livestock populations in relation to the land area, coupled with the [`]user-right' land tenure system, makes the land use planning process in the communal lands of Zimbabwe…Publication Date 1990
- management
- land use
- policies
- politics
- socio-economic aspects
- subsistence agriculture
- Africa
- Library Collection RecordThis paper aims, first, to examine critically Kenya's economic, political, and planning systems, since they can be identified as the causal factors producing many of Kenya's environmental…Publication Date 1988
- economics
- politics
- policies
- legislation
- socio-economic aspects
- Africa
- Library Collection RecordPlant-derived smoke and aqueous extracts of smoke stimulate germination of dormant seed of the important fire-climax grass Themeda triandra (redgrass). The positive germination response to smoke…Publication Date 1994
- Themeda triandra
- plant-derived smoke
- seed germination
- ethylene
- Africa
- Library Collection RecordResults of various studies on the origin of Arctic air pollution are reviewed, focusing on what is known about its physical characteristics and chemical composition, as well as on emission sources…Publication Date 1995
- Arctic air pollutants
- emissions
- Origins
- climate change
- Africa
- Library Collection RecordNo abstract availablePublication Date 1991
- palaeobotany
- grassland
- soils
- Africa
- Library Collection RecordThe fossil locality of Fort Ternan, Kenya, preserves the remains of the middle Miocene hominoidKenyapithecus wickeri, and a reconstruction of the paleoenvironment of this site offers important…Publication Date 1991
- middle Miocene
- Bovids
- functional morphology
- Kenyapithecus
- paleoecology
- hominoid evolution
- palaeobotany
- Africa
- Library Collection RecordNo abstract availablePublication Date 1987
- palaeoecology
- Africa
- Library Collection RecordA state-of-the-art review is presented concerning the transport of nutrients (N and P), oxygen demanding compounds (BOD and COD), indicator organisms and pathogens in runoff from land areas receiving…Publication Date 1980
- pasture management
- rangelands
- pollution
- nutrient loads
- management
- runoff
- Africa
- Library Collection RecordStructural and stratigraphic aspects of the Lebowa Granite Suite (the granites) and Rustenburg Layered Suite (the basic rocks) are examined and compared in various compartments of the Bushveld…Publication Date 1990
- palaeobotany
- Africa
- Library Collection RecordAn extensive search was made for distinctive shock-metamorphic effects in order to test the theory that the Bushveld Complex (BC) was formed by the impact of large extraterrestrial objects. Field and…Publication Date 1990
- palaeobotany
- Africa
- Library Collection RecordPaleomagnetic pole positions, ocean-floor magnetic anomalies and least-squares fits of continental edges show that most Phanerozoic orogenic belts have formed at or near the borders of continents and…Publication Date 1976
- palaeobotany
- Africa
- Library Collection RecordThe effects of soil texture and grassland management, i.e. rate of fertilizer N input, mowing vs grazing, and the number of years the site is under grass, on the amounts of soil organic C and N and…Publication Date 1994
- soil nutrients
- grasslands
- management
- Soil Condition
- grazing
- mowing
- Africa
- Library Collection RecordAs sustainable crop management systems are developed, an assessement of the effects of these practices on the soil microflora is essential to ensure maximum productivity. A 3-year field study was…Publication Date 1995
- Africa
- Library Collection RecordThis paper presents the results of a two-year study commissioned by the Department of Interior to examine the costs and benefits of a remote data acquisition system for natural resource management.…Publication Date 1984
- Africa
- Library Collection RecordA pollen sequence in a relatively young hyrax dung midden in the Orange Free State, South Africa, shows marked changes in composition which can be related to environmental fluctuations. The midden…Publication Date 1992
- palaeobotany
- Africa
- Library Collection RecordPollen analysis of vlei or swamp sediments from the Nuweveldberg Mountains in the Central Karoo yields a vegetation history spanning the last 760 years. It sheds light on the local vegetation shifts…Publication Date 1989
- palaeobotany
- palaeoclimate
- Africa
- Library Collection RecordResults of fossil pollen studies in Eastern, Central and Southern Africa covering the last 32,000 years are surveyed in this paper. This research, conducted between 1951 and 1985, was mostly…Publication Date 1988
- palaeobotany
- Africa
- Library Collection RecordPollen spectra in a peat deposit from a mountainous area near Tate Vondo in Venda have been grouped into three zones. The oldest zone of c. 12,000-10,000 yr B.P. contains mainly grassland and fynbos…Publication Date 1987
- palaeobotany
- Africa
- Library Collection RecordPollen analyses of rare spring deposits in the Transvaal, South Africa, ranging back to roughly 35 000 B.P., were carried out. A photographic record of 140 types of palynomorphs was made. Indicators…Publication Date 1982
- palaeobotany
- Africa
- Library Collection RecordGround investigations of rangeland use and condition are restricted by resource and travel limitations. Management of these vast, multiuser resources could be enhanced by information from remote…Publication Date 1995
- remote sensing
- rangeland condition
- management
- Africa
- Library Collection RecordRemote sensing applications used for resource assessment often lack the capacity to test image data against predictions. This article describes remote environment and management assessment (REMA), a…Publication Date 1995
- remote sensing
- Landsat images
- rangelands
- animal impact
- fodder production
- modelling
- Africa
- Library Collection RecordThis article is the continuation of a study of the relationship between NDVI and rainfall in semiarid Botswana. That study notes significant differences in the NDVI-rainfall relationship for various…Publication Date 1994
- modelling
- NDVI values
- rainfall
- soils
- Africa
- Library Collection RecordThis study examines the variability of the normalized difference vegetation index (NDVI) over Bostwana during the period 1982-1987. Its relationship to rainfall is evaluated from 26 stations…Publication Date 1994
- NDVI values
- rainfall
- soils
- savanna
- plant production
- ecosystem ecology
- Africa
- Library Collection RecordSpatial dependence is a fundamental structure of spatial data that can be readily measured. Change in landscapes can be monitored effectively using measures of spatial dependence. Scale of…Publication Date 1993
- grasslands
- grazing
- modelling
- Landsat images
- remote sensing
- Africa
- Library Collection RecordChanges in vegetation cover over time in arid rangelands can be used to monitor land condition and to identify processes of land degradation. This article describes how a cover index can be derived…Publication Date 1993
- remote sensing
- monitoring
- rangeland condition
- degradation
- soils
- Landsat images
- Africa
- Library Collection RecordRemote sensing data has not been used to its fullest potential for management of natural resources largely because these data are not readily available. Video remote sensing has been proposed as an…Publication Date 1991
- remote sensing
- management
- agriculture
- erosion
- soil moisture
- Africa
- Library Collection RecordNear-infrared and mid-infrared spectroradiometric reflectance variables were studied for estimating grass phytomass production within grass plots fertilized with five rates of nitrogen. Nine…Publication Date 1989
- Africa
- Library Collection RecordThe literature suggests that two different approaches have been applied to problems of rangeland monitoring using MSS data. These are referred to as the near infrared over red ratio which has been…Publication Date 1987
- remote sensing
- rangeland condition
- savanna
- modelling
- Africa
- Library Collection RecordThis paper reviews the current capability of video imagery for rangeland management assessment. Three video systems are described and evaluated: 1) a black-and-white four-band system with visible/…Publication Date 1987
- Africa
- Library Collection RecordThe spectral behavior of an arid, Lehmann lovegrass (Eragrostis lehmanniana), range canopy with varying quantities of live, green grass, senesced, yellow grass, weathered, gray litter, and different…Publication Date 1987
- grasslands
- remote sensing
- plant production
- soils
- rangeland condition
- NDVI values
- Africa
- Library Collection RecordRemote sensing in aridland/rangeland regions has developed to meet the need for low cost management information over large expanses of land. Applications include rangeland management, watershed…Publication Date 1987
- remote sensing
- rangelands
- management
- Africa
- Library Collection RecordLandsat data were simulated for a three-component rangeland scene consisting of grass, brush, and soil to evaluate the effect of soil background reflectance on the sensitivity of ratio and orthogonal…Publication Date 1986
- Landsat images
- rangelands
- soil
- modelling
- Africa
- Library Collection RecordAirborne video imagery was evaluated for assessing phytomass production within grass plots fertilized with five rates of nitrogen. Video imagery was taken with two black-and-white video cameras--one…Publication Date 1986
- Africa
- Library Collection RecordTemporal variation in earth-atmosphere system reflectance in the 0.5-1.1 [mu]m wavehand was determined from Landsat MSS data for an area of and rangeland in south-central New Mexico. Data were…Publication Date 1986
- Africa
- Library Collection RecordHand-held MARK-II radiometric measurements were used to estimate biomass yields and nitrogen (N) content of Alicia grass (Cynodon spp.) plots having five levels of nitrogen fertilization. The…Publication Date 1983
- plant autecology
- plant production
- fertilizer
- rangeland condition
- remote sensing
- Africa
- Library Collection RecordEquus Cave, in Quaternary tufa near Taung in the semiarid woodland of the southern Kalahari, yielded 2.5 m of sediment in which a rich assemblage of bones and coprolites was preserved. The fossils…Publication Date 1987
- palaeobotany
- Africa
- Library Collection RecordPollen spectra from cores of organic spring deposits from the Transvaal provide evidence for the climatic evolution of the province during the last 35,000 yr B.P. or more. The past climatic phases…Publication Date 1982
- palaeobotany
- Africa
- Library Collection RecordThe development of reliable paleoclimatic maps at a global scale requires data at the following three levels of analysis: (1) well-recorded observations of evenly positioned, well-dated geological…Publication Date 1979
- palaeobotany
- palaeoclimate
- Africa
- Library Collection RecordThe dating of the Stone Age sequence in southern Africa has been considerably revised over the last decade, and one of the anomalies which has resulted is that the Middle Stone Age, now dated to…Publication Date 1978
- palaeobotany
- Africa
- Library Collection RecordSediment composition, grain size and clay mineral record of a high-resolution sediment core from the continental slope off Namibia was investigated to gain information on the deposition of…Publication Date 1996
- palaeobotany
- Africa
- Library Collection RecordTrophic structure and composition are examined in two important biotic records, one the Paleogene of Wyoming and Montana, and the other from the Neogene of Pakistan. The Paleogene sequence spans…Publication Date 1995
- palaeobotany
- Africa
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