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- Agriculture (19147 bytes)
5: ...cs|economic activity]] than in any other, yet it only accounts for four percent of the world's [[gross...
48: ... surplus for competitive gift-giving). Most certainly there was a gradual transition from [[hunter-gat...
56: ... used?--> Crops and animals that were previously only known in the Old World were now transplanted to ...
81: ...n the USA have increased from around 2.5 tons per hectare (40 bushels per acre) in [[1900]] to about 9.4 t/... - Alfalfa (6719 bytes)
18: ...nial flowering [[plant]], ''Medicago'', most commonly referring to ''M. sativa'' L., also called '''lu...
37: ...n climatic acceptable regions and a rate of 22 kg/hectare (20 lb/acre) in southern regions is used. A [[nu...
39: ... year. Total yields are typically around 1 tonne/hectare (4 ton/acre) but vary regionally and with the wea...
47: ...y into bales. There are three types of bales commonly used for alfalfa. Small "square" bales--actually... - Avocado (6755 bytes)
15: ...erate freezing temperatures, and so can be grown only in subtropical and tropical climates.
23: ...are particularly commonly available, 'Hass' (commonly misspelled 'Haas') and 'Florida'. The former is ...
25: ..., such as the Hass, have a tendency to bear well only in alternate years. After a season with a low y...
27: ...al [[Avocado Festival]]. There are about 24,000 [[hectare]]s (59,000 acres) of avocado [[plantation]]s in C... - Aztec (38742 bytes)
9: ...someone who comes from [[Aztlán]]", a place commonly believed to be located in northern Mexico or the...
22: ...ean empires, it was ethnically very diverse, but unlike most European empires, it was more a system of...
27: ...ered economically under the Aztec conqueror, and only at first. This increase in the overall welfare w...
59: ...nochtitlan itself had an estimated population of only 80,000 to 120,000 at that time. It is possible ...
74: ...od production. The other 80% of society were not only warriors, but also skilled artisans and aggressi... - Wildfire (23185 bytes)
22: ...]s, and [[flash flood]]s are to be expected. Not only does this result in severe property damage for t...
63: ...more resources are required. Hand tools are commonly used to construct firebreaks and remove fuels ar...
73: ... very severe, large fires, this is sometimes the only possible action. Protecting houses is regarded ...
117: * [[France]]: 30,000 [[hectare]]s (300 [[square kilometre|km?]], 12,140 [[acre]]...
122: * [[United States]]: 1.74 million hectares (17,400 km?, 4.3 million acres) i.e. 0.18% of th... - Lima bean (3691 bytes)
43: ...eed and 3000 to 8000 kilograms of [[biomass]] per hectare. - Area (2688 bytes)
9: :[[hectare]] = 10,000 square metres
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