Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Сторінка 307
... agricultural pur- poses whether decades or centuries ago.1 66 1 See Vegetation Affected by Agriculture in Central America , Bureau of Plant Industry Bulletin 145 , 1909. Other features of primitive agriculture , reforestation and ...
... agricultural pur- poses whether decades or centuries ago.1 66 1 See Vegetation Affected by Agriculture in Central America , Bureau of Plant Industry Bulletin 145 , 1909. Other features of primitive agriculture , reforestation and ...
Сторінка 308
... agriculture is characterized by the planting of crops in temporary clearings . Instead of keeping the same land under cultivation , new clearings are cut and burned for planting , while clearings of previous years are abandoned to the ...
... agriculture is characterized by the planting of crops in temporary clearings . Instead of keeping the same land under cultivation , new clearings are cut and burned for planting , while clearings of previous years are abandoned to the ...
Сторінка 322
... agriculture , as well as the largest series of cultivated plants . ( Pl . 7 , fig . 1. ) The Peruvian agriculture covered the entire range of production from tropical eastern valleys to the upper limits of potatoes and other Andean ...
... agriculture , as well as the largest series of cultivated plants . ( Pl . 7 , fig . 1. ) The Peruvian agriculture covered the entire range of production from tropical eastern valleys to the upper limits of potatoes and other Andean ...
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Bureau of American Ethnology | 17 |
Report on the United States National Museum | 25 |
EXECUTIVE COMMITTEE AND REGENTS | 100 |
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