Readings in Wildlife ConservationJames Allen Bailey, William Elder, Ted D. McKinney Wildlife Society, 1974 - Всего страниц: 722 |
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Стр. 403
... problem to be the improvement of natural range vegetation in the ponderosa pine forests of the Blue Mountains in Oregon , through better grazing management . When he has defined his special problem to any degree such as this , the ...
... problem to be the improvement of natural range vegetation in the ponderosa pine forests of the Blue Mountains in Oregon , through better grazing management . When he has defined his special problem to any degree such as this , the ...
Стр. 406
... problem may be built up into project or problem analyses , some of which may outline a whole series of related problems needing research in any given region and field of knowledge . As you review these patterns of reasoning you will ...
... problem may be built up into project or problem analyses , some of which may outline a whole series of related problems needing research in any given region and field of knowledge . As you review these patterns of reasoning you will ...
Стр. 459
... problem was recognized , little was done to improve the situation . Authorization for the removal of elk by killing first was received in 1934 and 223 elk were removed by direct - reduction . Since that time , direct - reduction has ...
... problem was recognized , little was done to improve the situation . Authorization for the removal of elk by killing first was received in 1934 and 223 elk were removed by direct - reduction . Since that time , direct - reduction has ...
Содержание
PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
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Readings in Wildlife Conservation James Allen Bailey,William Elder,Ted D. McKinney Просмотр фрагмента - 1974 |
Часто встречающиеся слова и выражения
acres adult agencies animals annual areas Barbary sheep behavior big game biological biologists birds black-tailed deer breeding burning Canada Canada geese caribou carrying capacity changes chaparral conservation cost crop Dall sheep diversity ecological economic ecosystem effects environment example exotic experience factors farm fertility Fish and Game fish and wildlife forage forest game management geese goose groups grouse growth habitat harvest herd hunters hunting important increase individual kill land Leopold limited living mallards marshes ment method Mississippi Flyway moose mortality muskrats National Park natural organic Park Service percent plants population density prairie predation problem production quail recreation refuge reproductive result ruffed grouse season seed sharecropping shrubland social soil species sport square miles succession territory tion types ungulates unit vegetation waterfowl white-tailed deer wild Wildl wildlife management wildlife resources winter range wolf wolves