ENV200 Chap 8 Notes Textbook Notes (Land Resources and Uses)

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School of Environment
Karen Ing

ENV200 Chapter 8Land Resources and Uses 1y Terrestrial land base of Earth is about 148940000 square kilometersy Canada has 6 of the worlds total land area y Canada is one of largest agricultural producers in the worldCrown Land y Land owned by the government either federal or provincial y Provides vital ecosystem services that benefit humanso Include wildlife habitat flood and erosion control groundwater recharge and breakdown of pollutants Industrialized agriculture y Modern agricultural method used mostly in highly developed countries y Require large inputs of capital and energy fossil fuels and less landlabory Used to make and run machinery irrigate crops and produce agrochemicals ex commercial fertilizers and pesticidesy Produce high yields amount of food produced per unit of land y Downsidessoil degradation and increased pesticide resistance in pests Subsistence agriculture y Traditional agricultural method used in developing countries y Depend on labor and large amount of land to produce enough food to feed oneself and ones familyShifting cultivation y Form of subsistence agricultureland left y Short periods of agriculture are followed by longer periods of fallowuncultivated y Supports small populations y Includes slash and burn agriculture nomadic herding and intercropping Slash and burn agriculturey Type of shifting cultivation y Involves clearing small patches of tropical rainforest to plant crops y Tropical soils lose productivity quickly when cultivated farmers using this must move from one area of forest to another every couple of years Nomadic herding y Type of subsistence agriculture y Livestock is supported by land too arid for successful crop growthy Herders must continually move their livestock to find adequate food for them Intercropping y Type of subsistence agriculture y Growing a variety of plants simultaneously on same field y When certain crops are grown together produce higher yields than when grown aloney Monoculturecultivation of only one type of plant over large area y Polyculturemany kinds of plants that mature at different times are planted together
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