Environmental Science 1021F/G Lecture Notes - Lecture 8: Canadian Prairies, Sustainable Yield, Soil Fertility

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Soil not usable, less organic matter, not fertile. Agricultural land used to feed livestock, not ppl. Rate that you can use a resource w/o degradation. Increase in development = increase in meat production. 55% of sh now from open ocean sheries. So few left to breed, no longer commercially viable. Supplements--> feed your sh other sh, and grain (corn) Only with sh species that return to birthplace to reproduce. When they return to spawn, they are captured. Reduce fertilizer input b/c natural input from sh waste (nitrogen!) Fewer farms, but larger and owned by fewer people. Grow a lot of grain-->don"t require a lot of moisture. Grow a lot of fruit and others that require moisture. Real ecosystems! been here for a long time. Roots control water, spaces in soil hold air and water. Just b/c you move, doesn"t mean you can use it.

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