Rangeland Ecology & Management
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Displaying 101 - 150 of 160 results
- Library Collection RecordAgronomic analyses of soil dynamics in Africa have been found to be too simplifying and lacking any perspective on the critical role of farmers. Yet soil degradation is widespread and serious, and in…Publication Date 2005
- soil degradation
- Nutrient depletion
- agricultural production
- farming systems
- Price policies
- socio-economic aspects
- agriculture
- subsistence agriculture
- Soil Condition
- soil erosion
- Africa
- Library Collection RecordIn many agricultural systems in the semi-arid tropics, crops use only a small fraction of the total rainfall. Agroforestry can greatly reduce some losses, especially on hill slopes, where soil…Publication Date 2005
- Soil evaporation
- Micro-lysimeters
- agroforestry systems
- Hedgerow intercropping
- mulch
- Senna siamea
- grass strips
- Maize
- Cowpea
- agriculture
- rainfall
- soil moisture
- Africa
- Library Collection RecordRestoration of degraded soils is a development strategy to reduce desertification, soil erosion and environmental degradation, and alleviate chronic food shortages with great potential in sub-Saharan…Publication Date 2005
- soil organic matter
- soil degradation
- global warming
- soil restoration
- agroforestry
- farming systems
- ecoregions
- Sub-Saharan Africa
- carbon sequestration in soil
- soil organic carbon
- carbon sequestration
- climate change
- restoration ecology
- degradation
- Soil Condition
- desertification
- erosion
- carbon dioxide
- fire ecology
- agriculture
- management
- Africa
- Library Collection RecordThe role of the hydrological cycle in contributing to the livelihoods of rural communities is often said to be important, but clear evidence of this is rarely offered. Furthermore, where such aspects…Publication Date 2004
- Green water
- Blue water
- Rural livelihoods
- hydrological cycle
- land use change
- hydrology
- land use
- ecology
- rural areas
- rainfall
- runoff
- agriculture
- Africa
- Library Collection RecordThis paper analyses the claim of Sumberg [Sumberg, J., 2002. The logic of fodder legumes in Africa. Food Policy 27, 285-300] that there is a [`]logic of fodder legumes' in Africa based on an…Publication Date 2004
- fodder legumes
- Fodder grasses
- crop residues
- Africa
- Crop-livestock systems
- Development narratives
- Participatory approaches
- Livestock policy
- fodder production
- fodder quality
- livestock
- agriculture
- Africa
- Library Collection RecordBiological productivity of grazing livestock under semi-arid conditions in northern Kenya is limited by marked seasonal fluctuations in the availability and quality of rangeland resources. With the…Publication Date 2004
- Seasonal breeding
- goats
- productivity
- Pastoral systems
- Northern Kenya
- plant production
- animal production
- agriculture
- management
- Africa
- Library Collection RecordNo Abstract available.Publication Date 2003
- grasslands
- management
- agriculture
- southern Africa
- Library Collection RecordResearch on the effects of ozone on agricultural crops and agro-ecosystems is needed for the development of regional emission reduction strategies, to underpin practical recommendations aiming to…Publication Date 2003
- Tropospheric ozone
- Ozone flux
- Ozone risk assessment
- detoxification
- Antioxidants
- Agricultural crops
- grassland
- climate change
- agriculture
- modelling
- plant production
- ecosystem ecology
- carbon dioxide
- Africa
- Library Collection RecordThe Western Cape Province of South Africa has a long history of human occupation and utilisation; the impact of colonial settlement (late 17th century onwards) on agriculture has been especially…Publication Date 2003
- soil erosion
- soil conservation
- Land use policy
- Environmental history
- South Africa
- conservation
- land use
- agriculture
- degradation
- Africa
- Library Collection RecordIn southern African countries soil erosion and the related problems, such as water quality issues or decreasing soil productivity, are the main topics affecting the inhabitants of both rural and…Publication Date 2003
- gully erosion
- Erosion modelling
- Erosion Response Units
- Swaziland
- South Africa
- modelling
- soil erosion
- agriculture
- remote sensing
- Africa
- Library Collection RecordQuestions as to whether public investment in international agricultural research is a [`]Good Thing' or not may best be addressed using two arguments: (1) justifications based on whether or not…Publication Date 2003
- livestock
- System
- classification
- mapping
- animal production
- economics
- agriculture
- subsistence agriculture
- Africa
- Library Collection RecordThis paper examines variation in local perceptions of risk in semi-arid Tanzania, identifying factors that influence local perceptions of problems and testing the feasibility of risk mapping as a…Publication Date 2003
- Africa
- agriculture
- Gender
- pastoralism
- Sustainable development
- water
- socio-economic aspects
- household income studies
- mapping
- Africa
- Library Collection RecordJohn Acocks' ideas on the recent and future changes of vegetation in South Africa occupy an important conceptual position in the first and subsequent editions of Veld Types of South Africa.…Publication Date 2003
- rangeland condition
- rangelands
- grasslands
- management
- agriculture
- degradation
- vegetation dynamics
- Africa
- Library Collection RecordLittle is known regarding the effects of land use on soil organic matter status and earthworm communities in South African soils. For that reason the effects of the main agricultural land uses in the…Publication Date 2003
- earthworms
- Soil organic C
- microbial biomass
- pastures
- Arable crops
- forests
- Oxisols
- South Africa
- KwaZulu-Natal
- Soil Condition
- soil fertility
- invertebrates
- agriculture
- management
- land use
- Africa
- Library Collection RecordThis study investigates the practical and financial implications of alternative strategies for meeting explicit conservation goals on the Agulhas Plain, South Africa. This is an area of exceptional…Publication Date 2003
- conservation planning
- off-reserve conservation
- Protected area network
- incentives
- Economic Aspects
- conservation
- biodiversity
- Alien invasive species
- agriculture
- land use
- management
- legislation
- Africa
- Library Collection RecordThis is a keynote paper focusing on regional perspectives on agriculture and biodiversity by exploring the situation in Northern Africa, the West African Sahel, East Africa and the Horn, and Southern…Publication Date 2003
- agriculture
- biodiversity conservation
- disequilibrium theories
- environmental Kuznet's curve
- hotspots
- agroecological intensification
- agrodiversity
- organic farming
- agroforestry
- biodiversity
- economics
- soils
- livestock
- management
- land-use
- Africa
- Library Collection RecordThe following dissertation sets out to investigate the decline of agriculture in Mission location at Butterworth, Transkei, using the Rehabilitation Scheme as a benchmark. The scheme was introduced…Publication Date 2003
- agriculture
- South Africa
- Transkei
- land use
- land tenure
- soil erosion
- politics
- policies
- communal farming
- southern Africa
- Library Collection RecordThe tropics cover 8.2 billion hectares or approximately 40% of the world's land area. These regions are characterized by a large portion of the world's rapidly increasing population, high…Publication Date 2002
- carbon dioxide
- carbon dynamics
- carbon sequestration
- Carbon Sink
- greenhouse gases
- climate change
- soils
- socio-economic aspects
- land use
- agriculture
- southern Africa
- Library Collection RecordThis paper explores the long-standing interest in the introduction of fodder legumes as an essential component of mixed farming systems in Africa. The central argument is that because of certain…Publication Date 2002
- fodder legumes
- research
- uptake
- Africa
- mucuna
- mixed farming
- Crop-livestock interactions
- fodder quality
- agriculture
- livestock
- socio-economic aspects
- Africa
- Library Collection RecordMost soils in the Midwestern USA have lost 30 to 50% of their original pool, or 25 to 40 Mg C/ha, upon conversion from natural to agricultural ecosystems. About 60 to 70% of the C thus depleted can…Publication Date 2002
- soil carbon sequestration
- Hidden carbon costs
- agricultural soils
- grazing lands
- greenhouse effect
- management
- carbon dynamics
- carbon sequestration
- agriculture
- Africa
- Library Collection RecordSummary The savanna biome is diverse, including formations ranging from almost treeless grasslands to more or less closed-canopy woodlands with considerable variation in plant composition, biomass,…Publication Date 2001
- savanna
- animal production
- plant production
- plant community ecology
- land use
- degradation
- agriculture
- ecology
- southern Africa
- Library Collection RecordThe development of cropping systems simulation capabilities world-wide combined with easy access to powerful computing has resulted in a plethora of agricultural models and consequently, model…Publication Date 2001
- systems approach
- modelling
- Farmer interactions
- climate
- management
- agriculture
- policies
- decision support systems
- Africa
- Library Collection RecordOver 120,000 non-native species of plants, animals and microbes have invaded the United States, United Kingdom, Australia, South Africa, India, and Brazil, and many have caused major economic losses…Publication Date 2001
- plants
- animals
- Alien
- economic
- ecology
- environment
- agriculture
- Non-indigenous
- Alien invasive species
- Economic Aspects
- Africa
- Library Collection RecordAbstract The effects of intensive commercial livestock farming on the distribution and habitat use of the redwing francolin, Francolinus levaillantii, was investigated to identify habitat constraints…Publication Date 2000
- grasslands
- habitat
- home range
- redwing francolin
- agriculture
- ecology
- management
- fire
- birds
- Africa
- Library Collection RecordThis paper provides a summary of our current understanding of the key drivers of N2O emissions from soil in temperate and tropical, natural and agricultural ecosystems. These drivers are substrate…Publication Date 2000
- agricultural soils
- Natural soils
- N fertiliser
- N deposition
- soil water
- temperature
- greenhouse gases
- soil
- agriculture
- soil fertility
- management
- Africa
- Library Collection RecordA number of methodological approaches to understanding and quantifying the potential impacts of changes in macroeconomic and sectoral policies on the natural resource environment have been developed…Publication Date 2000
- Farming practices
- Economic policy
- Environmental indicators
- South Africa
- policies
- Economic Aspects
- decision support systems
- agriculture
- Africa
- Library Collection RecordEntire sub-Saharan Africa and pockets of Asian population is at risk of starvation. The problems and possibilities are however quite different amongst the two regions. Africa with its less than 8% of…Publication Date 2000
- agriculture
- climate
- food security
- Early warning
- Needs
- opportunities
- socio-economic aspects
- subsistence agriculture
- Africa
- Library Collection RecordThe scale "jump" in hydrology and agriculture from the small scale at which individual processes such as infiltration, soil water redistribution, evapotranspiration, soil loss or crop…Publication Date 2000
- scale
- scaling
- hydrology
- agriculture
- soil moisture
- climate change
- Economic Aspects
- Africa
- Library Collection RecordRecent political transformation in South Africa has laid the basis for significant socioeconomic change. One area in which the greatest socioeconomic disparities are discernable is the agricultural…Publication Date 1999
- agriculture
- Resettlement
- Rural development
- South Africa
- socio-economic aspects
- subsistence agriculture
- commercial agriculture
- economics
- Africa
- Library Collection RecordThe meteorological and agricultural assessment techniques that have been developed in South Africa are discussed, with reference to their strengths and weaknesses, application and suggested future…Publication Date 1998
- drought
- agriculture
- modelling
- remote sensing
- Africa
- Library Collection RecordThis paper examines the interest in the development and promotion of mixed farming in sub-Saharan Africa. For over 70 years mixed farming has been a dominant model for agricultural development…Publication Date 1998
- mixed farming
- Sub-Saharan Africa
- crop-livestock interaction
- nutrient cycling
- integrated farming
- agriculture
- socio-economic aspects
- Sustainable development
- livestock
- subsistence agriculture
- Africa
- Library Collection RecordSurface temperature (Ts), air temperature (Ta), atmospheric precipitable water (U), and vapor pressure deficit (D) have been derived from algorithms that use satellite observations of visible, near…Publication Date 1998
- environmental factors
- remote sensing
- savanna
- agriculture
- mapping
- Africa
- Library Collection RecordSinking boreholes to tap groundwater supplies facilitated expansion of all-year round livestock production into the semi-arid Kalahari. Increased grazing and trampling pres sure around the boreholes…Publication Date 1997
- agriculture
- piosphere
- grazing
- grasslands
- soil erosion
- Soil Condition
- cattle
- watering points
- rainfall
- modelling
- Africa
- Library Collection RecordA near real-time crop-specific drought monitoring system that combines crop modelling and a geographical information system (GIS) has been developed in South Africa. The system is intended to provide…Publication Date 1997
- agriculture
- drought
- modelling
- GIS
- decision support systems
- monitoring
- Africa
- Library Collection RecordSummary The Nyl River floodplain is one of southern Africa's conservation, eco-tourism and agricultural assets. Its location in a water-stressed region means that the biota of the Nyl River…Publication Date 1996
- floodplain ecosystem
- landscape ecology
- water resource
- conservation
- eco - tourism
- agriculture
- Economic Aspects
- Africa
- Library Collection RecordRiver salination due to dryland agriculture was studied between 1985 and 1986 in the 150-km2 large catchment of the Sandspruit river, a tributary of the Berg river in the semi-arid Western Cape…Publication Date 1995
- agriculture
- hydrology
- rainfall
- modelling
- soils
- Africa
- Library Collection RecordOver the years a number of vegetation management systems has been evaluated and recommended. The Potch system is also a management system which was specifically developed for semi-arid regions where…Publication Date 1995
- grassland management
- ISPD model
- semi-arid
- vegetation condition improvement
- management
- vegetation dynamics
- rehabilitation
- grasslands
- agriculture
- Africa
- Library Collection RecordThe basic reasons for the present unsatisfactory structure of agricultural R & D in Southern Africa and particularly in South Africa, are the focus of R & D on the commercial sector of…Publication Date 1995
- socio-economic aspects
- stakeholders
- agriculture
- Africa
- Library Collection RecordDevelopment and use of crop growth simulation models has increased in the last decades. Most crop growth models require daily weather data as input values. These data are not easy to obtain and…Publication Date 1994
- agriculture
- modelling
- plant production
- data analysis
- climate
- Africa
- Library Collection RecordThe carrying capacity concept was developed from animal ecology, and applied to rangeland management in order to assess sustainable livestock stocking rates. In it, long-term ecological…Publication Date 1994
- rangelands
- management
- livestock
- carrying capacity
- stocking rates
- agriculture
- sustainability
- 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 RecordMultiple land-use designs are becoming increasingly necessary in semi-arid Africa as growing populations focus numerous production systems onto spatially limited arable lands. Engineering distinct…Publication Date 1993
- land use
- fodder production
- agriculture
- irrigation
- livestock
- carrying capacity
- pastoralism
- management
- Africa
- Library Collection RecordThe role of empiricism in predicting mean annual primary production at the mesoscale is demonstrated through development of a simple model (RESAP) for application over all land surfaces within a…Publication Date 1993
- savanna
- modelling
- plant production
- mapping
- agriculture
- 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 RecordSince its beginning about ten thousand years age, agriculture has spread steadily around the world to become a dominant form of land management on all continents. Agricultural practices have affected…Publication Date 1992
- agriculture
- conservation
- management
- Africa
- Library Collection RecordResults are presented of the diagnostic phase of a study of the [`]traditional' smallholder system of cattle production in southern Mozambique. Data were obtained over an 18-month period from…Publication Date 1991
- cattle
- subsistence agriculture
- agriculture
- commercial agriculture
- land use
- management
- 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 RecordA transition from shifting cultivation towards more intensive types of agriculture necessitates the introduction of alternative systems of cultivation. Since this change is often followed by…Publication Date 1990
- agriculture
- subsistence agriculture
- soil fertility
- land use
- 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