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Geology - Changing the Earth Surface Through Agriculture - History of Agriculture - Report Writing Assessment Answer
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Internal Code: 6CIEG
Geology History of Agriculture Report Writing Assessment Answer
Assignment Task:Changing the Earth Surface Through Agriculture -
Surface properties of soils regulate infiltration of rainwater, gas exchange, water retention, temperature fluxes, albedo and many more. Without humans, large parts of the earth surface would be permanently covered by thick vegetation. Human land use changes this natural vegetation cover by transforming large parts of the earth’s surface into the agricultural field, grazing paddocks or horticulture areas. The land use change comes with changes in chemical and physical soil parameters which influence important soil functions. A comparison between fields used for pumpkin growing under more conventional methods as well as using biological methods is made with a nearby ‘native situation’. Students will assess certain soil functions in the field and take samples for subsequent laboratory analysis. You will assess parameters like hydraulic conductivity, soil moisture, EC and pH, soil carbon, Cation Exchange Capacity (CEC), and CaCO3 content.- Give a brief description of the history of agriculture: where and when has it started, and describe the spatial coverage of agriculture on the earth surface in the 21st century. [35 %]
- List and describe 3 chemical or physical properties of global significance which are altered or influenced by agricultural land use. [35 %]
- Horticulture is known for its high water demand. Market gardens for the Perth metropolitan area are a major user of water. Give a brief history of the influence of horticulture on Perth’s water tables and describe the prognosis for the years to come. [30 %]
- Provide a short overview and explain the used methods in their general principal, give references. [10 %]
- Present all the data in tables and graphs so it helps your discussion in point 3 [40 %]
- Give a conclusive evaluation of all the different sites you have tested. What are the differences? Which of the management techniques work best in terms of water infiltration and retention? [50 %]
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