ENVIRSC 2EI3 Lecture Notes - Lecture 9: Bioaccumulation, Soil Structure, Bioconcentration
7 Dec 2017
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More individuals in developing countries are directly involved with agriculture/food production compared to u. s. Industrial agriculture: need lots of fossil fuels, 25% of global agricultural land is industrialized, mostly mechanized. Plantation agriculture: low land required, low initial investment, extensive labour requirement, form of industrialized agriculture, most common in tropical industries. Traditional agriculture: extensive land required, low labour and low capital required, no energy demand. Nomadic herding: lots of land required, low labour and capital. 17% of commercial energy used is allocated to agriculture. Monocultures can increase yield as well as fertilizers, better irrigation. G(cid:396)ee(cid:374) revolutio(cid:374) o(cid:272)(cid:272)u(cid:396)(cid:396)ed i(cid:374) (cid:1005)9(cid:1009)(cid:1004)"s in developed countries, second in 1967 onward in developing countries. Impacts of industrialized agriculture: killing of wild predators, loss and degradation from clear-cutting, wetland draining, soil erosion, loss of fertility, salinization, ghg emissions from fossil fuel use, pollution from pesticide sprays. Increased run-off/flooding from agricultural land: aquifer depletion, eutrophication, effects on human health.
