Readings in Wildlife ConservationJames Allen Bailey, William Elder, Ted D. McKinney Wildlife Society, 1974 - Всего страниц: 722 |
Результаты поиска по книге
Результаты 1 – 3 из 59
Стр. 638
... forage avail- able , 110,000 animal units could be supported . A forage function F can be defined such that given a positive number t , where t = 0 is the present and t = 5 is five years into the future , then the number F ( t ) is the ...
... forage avail- able , 110,000 animal units could be supported . A forage function F can be defined such that given a positive number t , where t = 0 is the present and t = 5 is five years into the future , then the number F ( t ) is the ...
Стр. 640
... forage produc- tion which peaked sometime in the 1940's . Since that time , forage produc- tion has diminished as conifers have invaded the seral brushfields , and forage has grown out of reach . Fires have been largely eliminated , and ...
... forage produc- tion which peaked sometime in the 1940's . Since that time , forage produc- tion has diminished as conifers have invaded the seral brushfields , and forage has grown out of reach . Fires have been largely eliminated , and ...
Стр. 642
... Forage equiva- lents is a multiple of forage per acre and the quality factor . A quality factor " Qual " has been interjected to account for nutritional and other differences . Forage from different areas has different nutritional ...
... Forage equiva- lents is a multiple of forage per acre and the quality factor . A quality factor " Qual " has been interjected to account for nutritional and other differences . Forage from different areas has different nutritional ...
Содержание
PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
Авторские права | |
Не показаны другие разделы: 33
Другие издания - Просмотреть все
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