AGBAS1 The student evaluates human needs and demonstrates
AG-BAS-1 The student evaluates human needs and demonstrates the role of agriculture in meeting the needs of humans: historically, currently, and in the future. August 2008
AG-BAS-1 d Traces major changes and accomplishments in the history of agriculture August 2008
Materials Developed from: Agri. Science, 4 th ed. 2006 J. Lee and D. Turner Pearson/Prentice Hall Chapter 1: Human Needs and Agri. Science, pgs 11 -14 August 2008
How agriculture changed the world • Early man lived a nomadic existence as hunters and gathers. August 2008
How agriculture changed the world • Among the first animals eaten…snails, clams, oysters, crawfish. August 2008
How agriculture changed the world • Among the first plants eaten…wild berries, melons, beans, figs, nuts, and other fruits and veggies. August 2008
How agriculture changed the world • Earliest clothing…leaves and animal skins. August 2008
How agriculture changed the world • Early shelter…caves, under big rocks, trees. August 2008
How agriculture changed the world • Life changed when man learned how to domesticate (tame or control) animals and wild plants. August 2008
How agriculture changed the world • Domestication began around 10, 000 years ago. August 2008
How agriculture changed the world • Among the first domesticated animals… donkeys, goats, cattle, dogs. August 2008
How agriculture changed the world • The first crop…wheat. August 2008
How agriculture changed the world • Domesticated plants and animals meant a dependable food supply; no need to travel to follow game and wild plants. August 2008
How agriculture changed the world • Agriculture led to the villages, cities and eventually civilizations. August 2008
Farming has become more efficient • Over the millennium, farming has become easier- and fewer farmers can produce more food. August 2008
Farming has become more efficient • In America in the late 1700 s, 90% of people “lived on the land. ” • Today…. 2% of Americans are farmers, and most people work elsewhere. August 2008
Farming has become more efficient • The United States has developed agricultural technology that is shared world -wide. August 2008
Farming has become more efficient • This has benefited the U. S. , as well as the world. • In America, we now depend on produce imported from the southern hemisphere during our winter. August 2008
Inventors and Inventions • Over the past 300 years, inventions have greatly changed agriculture. August 2008
Inventor: Charles Townshend – a. k. a. “Turnip Townshend” • first crop sequencing/rotation system in the early 1700 s in England. • rotated legumes and grains to improve soil fertility. August 2008
Invention: Crop Rotation August 2008
Inventor: Jethro Tull • developed a seed drill/planting machine in the early 1700 s – before this, seeds were just cast on the ground to grow…or not. • today’s high-speed planters grew from this early effort. August 2008
Invention: Seed drill August 2008
Inventor: Eli Whitney • developed the cotton gin in 1793, an invention that greatly reduced the labor required to remove seeds from the cotton fiber. August 2008
Invention: Cotton gin August 2008
Inventor: Cyrus Mc. Cormick • patented a harvesting machine (reaper) in 1834 that greatly reduced the amount of hand labor required to harvest grain. August 2008
Invention: Reaper August 2008
Inventor: John Deere • developed the steel moldboard plow in 1837. • this made it possible to till the heavy soils found in many parts of the U. S. August 2008
Invention: Self-scouring plow August 2008
Scientist: Gregor Mendel • discovered basic principles of heredity while working as a botanist in Austria in the mid-1800 s. • his work led to improvements in crops and livestock. August 2008
Discovery: Heredity August 2008
Agriculture in the last century early 1900 s – • improved varieties of corn were developed in the U. S. , known as hybrid corn. • by the mid 1950 s, nearly all the corn planted in the US was hybrid seed. August 2008
Agriculture in the last century mid 1900 s • new chemicals were developed to control insects, diseases, and weeds. • More advanced equipment became common on farms. August 2008
Agriculture in the last century late 1900 s and early 2000 s – • genetic engineering and other advanced methods of improving crops and livestock were being developed and applied. August 2008
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