BIO220H1 Lecture Notes - Lecture 8: Crop Rotation, Soil Conditioner, Folivore
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BIO220H1 Full Course Notes
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Document Summary
Quaternary period = an alternating period between glacial and interglacial periods. Humans diet in the past is opportunistic and unreliable. Humans are not adapted to a diet that only consists of leaves (folivory) We are attracted to seeds and tubers because they are the undefended part of the plan. Their attractiveness leads to dispersal; we get to them before natural dispersals. Tubers = storage organs, starch rich plants evolved to fuel their growth. Our cultural innovations for planting storing and cultivating leads to innovations in the plant: non-shattering seed head, amylase evolution amy1. Legumes turn atmospheric nitrogen into ammonia, and ammonia based products. Crop limitation: areas for growth are limited by: Factors which are related to soil: moisture & fertility. Baby boom post world war 2 global famines were also occurring. Adding animal dung is a way to add the npk back into the soil: because animals have more npk than plants.
