Bio36_12_Food - 1 2 3 1 2 4 1 2 5 1 2 Overview Ch. 12: Food...

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1 Overview • Ch. 12: Food – Major Patterns of Food Production – From Green Revolution to Gene Revolution Major Patterns of Food Production • Modern industrialized agriculture • Green Revolution • Subsistence agriculture – Developing world • Animal farming • Biofuels Modern Industrialized Agriculture • Traditional b modern • Infrastructure • Machinery – Fossil fuel dependence • Land under cultivation – 987 million acres – Conservation Reserve Program • Chemical fertilizers crop yields • Pesticides – Pest resistance • Irrigation – Unsustainable use of groundwater • High-yielding varieties of plants The Green Revolution • High-yielding varieties & methods – Developed countries b developing countries •Latin America, later Asia • Impacts – More varieties still being developed – Without the Green Revolution •Crop yields would have been lower •More land would be in production Subsistence Agriculture • Subsistence farming in the developing world – Feeds most of the world’s rural poor •Best for areas with low population density •Often on marginally productive land – Swidden agriculture • Sub-Saharan Africa – Low crop yields – Rapid population growth •Poverty, hunger, high child mortality – Alliance for a Green Revolution in Africa •Crop scientist improve traditional food crops •Improve irrigation, soil health, ag. markets 1 2 3 1 2 4 1 2 5 1 2
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2 Animal Farming • Livestock industry • Confined animal feeding operations (CAFOs) – 70% of grain crop in U.S. goes to animals – Run-off of wastes – Diseases •Antibiotics in feed •Antibiotic resistance
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This note was uploaded on 01/12/2012 for the course BIOLOGY 36 taught by Professor Teresafinnern during the Fall '11 term at Riverside Community College.

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Bio36_12_Food - 1 2 3 1 2 4 1 2 5 1 2 Overview Ch. 12: Food...

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