ENV100Y5 Chapter Notes - Chapter 8: Resource Productivity, Arable Land, Subsistence Agriculture
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ENV100Y5 Full Course Notes
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Document Summary
38 % of earth is agriculture - the practice of raising crops and livestock for human use/consumption. Most of our food is from cropland and rangeland (grazing livestock) Agriculture first appeared around 10 000 years ago. Agriculture is intensification - increase carrying capacity and productivity of a given unit of land. Oldest form = subsistence agriculture - producing only enough food for themselves. Today, industrialized agriculture (monoculture) = 25% of world"s cropland. Food security = guarantee of food to all people at all times. Arable land = suitable for the annual planting of crops. Undernourished = less than 90% of daily calories needed. Malnutrition - shortage of nutrients body needs (undernourished and overnurished people) o o. Intensification - new technologies permit greater resource more land into production production o. Prevented deforestation and habitat conversion in many countries while they were experiencing fastest growing pop growth rates. Organic fertilizers - natural materials (animal manure, etc)
