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Soil, Food and Agriculture Chapters 14 a nd 23

Soil, Food and Agriculture Chapters 14 a nd 23. Soil: the foundation for agriculture. Soil is a thin covering over most land that is a complex mixture of eroded rock, mineral nutrients, decaying organic matter, water, air, and billions of living organisms, most of them microscopic decomposers.

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Foods

Foods. Can we continue to feed the world?. Human Nutrition. Calories = measure of energy in food Need approx. 2,000 per day People who eat less calories than they burn are undernourished (marasmus) Nutrients = proteins, lipids, carbohydrates, vitamins, and minerals

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326 views • 15 slides

Scientific Models

http://youtu.be/cWh-XKhh8xo. REVIEW -&gt;. Scientific Models. Ecological Pyramid – represents energy amounts in different trophic levels of food chains and webs. Pyramid of Numbers – is a graphical representation of the numbers of individuals at each trophic level.

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234 views • 7 slides

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