Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 19 of 19 for “""Slash-and-burn" agriculture"”.
-
Constructing the problem of "slash-and-burn" agriculture
"Slash-and-burn" agriculture, or shifting cultivation, is perceived by many to be the leading cause of land degradation in tropical forests. Performed mainly by resource-poor farmers, shifting cultivation is the most widespread form of agriculture in the tropics. Concern over its environmental …
-
Factors Influencing Adoption of Conservation Agriculture in the Democratic Republic of the Congo
… to cope with its post-independence political and structural instability. From 1961 to 2000, the DRC experienced a decrease of 34% and 37% in daily caloric intake and protein intake, respectively. The DRC’s agriculture sector, led by women (who are the core of subsistence farming), is now being …
-
Hunting for humans in forest ecosystems : are the traces of Iron-age people detectable? : an investigation into the importance of Iron-age slash-an-burn agriculture in KwaZulu-Natal forests using compositional and demographic data and carbon isotope techniques
… are humans responsible for the biological landscapes that we see today? We relate to recent phenomena such as urban environments and commercial farmlands as anthropogenically created landscapes, however historic anthropogenic influence may have been a lot more extensive than previously …
-
PREHISTORIC SETTLEMENT VARIABILITY IN THE GRASSHOPPER AREA, EAST-CENTRAL ARIZONA
The variability of prehistoric settlements and settlement systems (settlement variability) is a result of the kinds of activities conducted (functional variability) and how long and intensively settlements were occupied (occupational variability). Previous studies of settlement variability, …
-
Climate finance instruments and Kenyan agriculture
Human activities lead to the emission of carbon and carbon equivalents into the atmosphere which leads to climate change. Some of the negative impacts of climate change include increased frequency of flooding and drought. These lead to loss of soil and crucial soil nutrients which affects …
-
Prehistoric Plant Procurement, Food Production, and Land Use in Southwestern Tamaulipas, Mexico
… I examine plant use, food production, and land use in the Ocampo region of southwestern Tamaulipas, northeastern Mexico. In the early 1950s Richard S. MacNeish excavated in a series of dry cave sites within the study area and discovered evidence for the local adoption of domesticated …
-
Habitat selection and breeding ecology of grassland birds in areas managed with fire and grazing
Conversions of grasslands to row crop agriculture over recent decades have contributed to steep declines in grassland bird populations in the Midwest. On top of habitat loss, the cessation of historic disturbance regimes on remaining grasslands has served to homogenize vegetation structure. Because …
-
Faulty sensor detection mechanism using multi-variate sensors in IoT
… in many applications such as smart cities, smart agriculture, smart health, smart home and etc. IoT devices are equipped with sensors such as temperature, humidity, pulse sensor, smoke and etc., offer many types of services for these applications. IoT devices are lightweight and have limited …
-
Effects of Management Practices on Grassland Plant and Bird Community Composition in Kane County Forest Preserves
<p>Loss of grassland ecosystems over the past century has increased importance of efforts to improve and restore habitat for native plant species and the biotic communities they support. As a result of these efforts, biotic and abiotic conditions and interactions with the environment are altered. …
-
Long-term Residue and Water Management Effects on Soil Respiration and Soil Aggregate Stability in a Wheat-soybean, Double-crop System in Eastern Arkansas
<p>Sustainability in agriculture is paramount to assuring continued production from our most naturally fertile soils. Storing carbon (C) in soil as organic matter through sustainable agricultural management practices can both remove atmospheric C and improve soil quality. The objective of this …
-
Optical and radar remote sensing of land use and land cover change in the tropics: An assessment of deforestation and secondary vegetation
<p>Quantification of the direct impact of land use in the tropics on net biotic carbon flux requires estimates of rates of deforestation, pre- and post-disturbance biomass, and fate of the cleared land. Synoptic observations of the extent, persistence, rates of secondary succession, and structure …
-
Smallholder Fire Prevention and Burning Activities Under the Threat of Accidental Fire: A Household Model Application from the Tapajós National Forest in the State of Pará, Brazil
Land-clearing fires set by settlers in the Brazilian Amazon give rise to large scale wildfires that threaten mature forests, agricultural plantations, and settlement areas. Our purpose is to examine labor devoted to fire prevention (firebreak establishment) and burning for crop production for …
-
Integrating remote sensing and terrain data in forest fire modeling
… destruction. They must, therefore, understand the spatial patterns of fires. Geographers can facilitate this understanding by developing new techniques for mapping fire behavior. This dissertation develops such techniques for mapping recent fires and using these maps to calibrate models of …
-
Metabolite Production in Callus Culture of Burdock (Arctium lappa L.)
… Amish community, it has been used for treating burns by placing burdock leaves on the wounds after the application of salve. This folk medicine is believed to be effective to speed healing, relieve pain, reduce scars, and prevent infection. More knowledge of the mechanism of burdock treating …
-
Reframing global warming for better risk management: climate change, food insecurity and societal collapse
Natural climate change, through its influence on agriculture, has been central to the rise and fall of civilisations throughout history. Anthropogenic climate change poses an unprecedented challenge and existential risk but, unlike natural climate change, it is a threat that contemporary society …
-
A pluralistic, socio-ecological approach to understand the long-term impact of mountain conservation: a counterfactual and place-based assessment of social, ecological and hydrological change in the Groot Winterhoek Mountains of the Cape Floristic Region
… areas to remain relevant, we need to understand their impact on a wide set of conservation objectives and environmental outcomes. We also need to evaluate how this influence relates to the socio-ecological environment within which they occur. This is a complex endeavour requiring a …
-
Firestorms in a mesic savanna-forest mosaic
Forests and savannas in a savanna-forest mosaic are maintained by positive feedback loops with fires, promoting fires in savannas and excluding fires in forests. Occasional extreme fires do however burn into forest edges and cause extensive mortality. So, while our understanding of bistability in …
-
NEW APPROACHES FOR MITIGATING ENVIRONMENTAL CONCERNS ASSOCIATED WITH COAL AND COAL COMBUSTION PRODUCTS
… 25 to 30 years, if not longer. The United States burns about 20% of the world's annual coal production, second only to China. Strikingly, there are 200-300 more years of burn at our current rate of consumption, considering our massive coal reserves. Almost half of our electricity comes from coal …