The National Geographic Magazine, Volume 190National Geographic Society., 1996 - Geography |
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Page 122
... trees . Explosive fires scour hillsides bare every 20 to 50 years . Tallgrass vives flam does inva Renewed large ... trees . With over- protection ( bottom ) , young trees and competing species make a flammable understory so shaded that ...
... trees . Explosive fires scour hillsides bare every 20 to 50 years . Tallgrass vives flam does inva Renewed large ... trees . With over- protection ( bottom ) , young trees and competing species make a flammable understory so shaded that ...
Page 123
... trees . When fire is rare , accumulated fuels explode into towering crown fires , and the thick floor burns long , hot , and deep , killing roots of grasses and trees . Frequency of fire Scientists measure frequency by scars on trees or ...
... trees . When fire is rare , accumulated fuels explode into towering crown fires , and the thick floor burns long , hot , and deep , killing roots of grasses and trees . Frequency of fire Scientists measure frequency by scars on trees or ...
Page 125
... trees , which would have been pruned by more frequent fires , have grown up in the spaces between the big old trees . The result is dense , flammable thickets where once trees were so widely spaced that horse carts could be driven among ...
... trees , which would have been pruned by more frequent fires , have grown up in the spaces between the big old trees . The result is dense , flammable thickets where once trees were so widely spaced that horse carts could be driven among ...
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adverse events American archaeologists Arizona astemizole Barragán Barzón Barzonistas border burn called Canyon century B.C. cetirizine Chiapas cisapride CLARITIN clinical Coadministration CONTRAINDICATIONS DAVID ALAN HARVEY Dnipro dose drug earth El Barzón fire fish Gaza Gaza City grass Greek HEARTLAND hepatitis Highland horses human Indian Israel Israeli itraconazole ketoconazole killed kurgan land landscape live looked loratadine Mexican Mexico City MEXICO CITY Pushing mg/kg mg/kg/day MICHAEL PARFIT miles million Monterrey Mountains MUSEUM NATIONAL GEOGRAPHIC National Park Navajo NGS CARTOGRAPHIC DIVISION night North Ossetian PACIFIC Eternal Mexico Palestinian patients peso PHOTOGRAPHS pine plasma concentrations PRIIT VESILIND Pushing the Limits rats reported Road to Reality says Scotland Scots Scottish Scythians Sierra Madre spider SPORANOX steppe street tarantula terfenadine things Tijuana tion Today TOMASZ TOMASZEWSKI town Toyota trees truck Ukraine Veracruz West Zapatistas ZYRTEC