ENV100Y5 Lecture Notes - Lecture 17: Drip Irrigation, Feedlot, Intensive Animal Farming
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ENV100Y5 Full Course Notes
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Document Summary
Food production diverted to biofuel production ( fuel derived from recently-dead biological material, woodfuels,cropwaste, energy from waste, usually crops from high in sugar, food or fuel controversy. Amazon is being used up by livestock. Our food choices are also energy water and land use choices. 90% of energy is lost every time energy moves from one trophic level to the next the lower on the food chain we eat the more people earth can support. Benefits: faster and more production of food, less space. The green revolution involved huge increases in theuse of irrigation. Improved technologies: efficient electric pumps, drip systems, more water directly to plant roots. Results: dry-season planting, minimize imp impacts of drought, cultivation on previously non-arable land. Drip irrigation: targets water directly to plants. Huge increase of fertilizer: limiting resource= nutrient in shortest supply, synthetic fertilizers can remove these limitations. Nitrogen if fixed synthetically by the haber-bosch process, process developed for munitions later used for fertilizers.
