Test 2

When shift in relationship with environment began
8,000 BC (Neolithic period)
the caring for or cultivation of plants. This caring for plants can be minimal or intensive, ranging from the encouraging of essentially wild individuals to the careful planting and rearing of selected species
Vernacular term for agriculture
used by archaeologists to refer to small-scale or incipient agriculture
Often confused with cultivation, involves the genetic alteration of plants brought about by the activities of humans
Artificial selection
Process in which selection of individuals can lead to changes in frequencies of the variants in populations. This can lead to cultivated crops that are are so distinctive in appearance that it is difficult to trace them back to particular wild species
Centers of domestication
Near East/”fertile crescent”: 11,000;Northern China: 9,000;Southern China: 8,000: Central Mexico: 8,000-10,000;Peruvian Andes: 8-10,000;Papua New Guinea: 6-9,000;West Africa: 4,500;Eastern No.

America: 4,000

Two types of agriculture in seed records
Seed crop and vegeculture
Seed crop
cereal grains (wheat, maize, rice); occur in simple ecological communities (low species diversity); very productive, but unstable – cultivation requires constant human intervention (e.g., burning, tilling, weeding)
root crops and tree crops (manioc, yams, taro, avocado, potato); complex plant communities (multi-species); less productive but more stable than seed crop, less labor inputs needed