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Impacts of Farming

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Impacts of farming systems on the environment. Concentrates on intensive plant production and slash and burn farming

Impacts of farming systems on the environment. Concentrates on intensive plant production and slash and burn farming

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    • 1. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Farming Systems
    • 2. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems • All agriculture exerts a set of impacts upon the environment • These impacts result from inputs of energy and materials into the system, processes within the system as well as outputs from the system.
    • 3. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems • Technocentric Modern farming techniques are seen to be less environmentally friendly than traditional farming methods
    • 4. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Cases Studies Comparing Farming Systems
    • 5. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Intensive Plant Production • Tend to be monocultures of selectively breed strains • Extensive inputs of Chemical fertilisers and pesticides • Indoor growing under glass using in temperature controlled conditions • Extensive use of machinery
    • 6. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Intensive Plant Production http://aboutenvironment.wordpress.com/ http://www.valcogreenhouse.com/en/cooling/greenhouse-fogging
    • 7. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Intensive Plant Production • Habitat loss as hedges and woodlands are removed to make bigger fields • bioaccumulation of toxins from pesticides up the food chain • Eutrophication through over use of chemical fertilisers • Soil erosion as biomass is continually removed
    • 8. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Intensive Plant Production http://www.woodlandtrust.org.uk/en/campaigns/planning- http://www.okstate.edu/artsci/botany/bisc3034/lnotes/ reform/northern-ireland/Pages/woodland.aspx agroeco.htm
    • 9. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Slash and Burn Farming • A small area of land cleared usually to be used by one family • Cutting vegetation then burning it on site adds nutrients from the ash • Area used for a short period of time • Growing of indigenous (native) plants
    • 10. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Slash and Burn Farming http://www.rainforestsaver.org/what-is-it-all-about/what-is- http://my.opera.com/terryyoder/blog/ slash-and-burn-farming/
    • 11. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Slash and Burn Farming • Allows small communities to survive where land is unproductive • Can cause erosion after burning when soil is exposed • When used by large communities leads to habitat loss • Original vegetation can quickly reestablish from secondary succession
    • 12. Topic 3: Human population, carrying capacity and resource use 3.5: Food Resources 3.5.3: Impacts of Farming Systems Slash and Burn Farming http://www.environmentalgraffiti.com/ecology/save-the- http://recs-intl.com/08Photo_trail/mz/photo_mz_ang03.htm rainforest-by-eating-yogurt/120