Butter mountains (80s)
John Seymour's Complete Book of Self-Sufficiency (1976)
Crop circles (1970s)
Silent Spring (1962) by Rachel Carson
the Green Revolution (1945)
the tractor (1920)
International Harvester Corporation (1902)
energy crops
nitrogen-based fertilizer (1849) was invented by Justus von Liebig
the Irish Potato Famine (1845–1849)
the mechanical reaper (1831) was developed by Cyrus McCormick
the Threshing machine (1784)
Scottish Agricultural Revolution (mid-eighteenth century)
Andreas Sigismund Marggraf discovered sugar in beets (1747)
the Great Irish Famine (1740-1741)
British Agricultural Revolution (16th century - 16th century )
Potatos were introduced to Europe (16th century) by Spanish explorers
Four-field crop rotation (early 16th century)
Pesticides (15th century)
the Columbian Exchange (1500)
carriages (Middle Ages)
the Horse collar (8th century)
the Stirrup (4th century)
Austronesian mariners introduced bananas to Madagascar (300) and sub-Saharan Africa,
thus making additional food supplies available and setting the stage for population growth
the Horseshoe (3rd century)
the spoked wheel (2000 bc)
wine making (3200 bc)
Potatos were domesticated in Peru and Bolivia (4400 bc)
Barley was domesticated in Egypt (5000 bc)
irrigation (5000 bc)
the plough (6000 bc)
Wheat was domesticated in Mesopotamia (7000 bc)
Corn was domesticated in the Oaxaca Valley (7400 bc)
the sickle (8000 bc)
the hoe (8000 bc)
domestication (10,000 bc)
metates are large stone slabs on which grain is crushed with a mano
