A cow-calf herd of Roosevelt elk (Cervus elaphus roosevelti)
resident to Indian Creek Research Center (ICRC), Oregon was observed
June-August, 1985 and March-August, 1986. Cows at ICRC reproduced in
alternate years; cows with calves led the herd a significantly
greater number of times than cows without calves (1985, P <...
Esophageal fistulation, stomach content analysis, fecal analysis,
and ocular-estimate-by-plot are four of the most publicized methods
of determining the diets of large herbivores. The principal objective
of this study was to compare the relative values of each of these
methods based upon information collected from bi-fistulated (esophageal
and rumen) sheep...
Centuries of continuous grain cropping in northern Africa have
reduced N levels in soils to a degree such that agricultural production
is now largely dependent upon nitrogen fertilizer. Through the
identification of highly effective legume and Rhizobium strain combinations,
the production of protein-rich livestock forage and green
manure can be...
The purpose of this research was to determine whether hybridization
between Amelanchier denticulata. (H.B.K.) Koch and Amelanchier nervosa
(Decaisne) StandL occurs in Oaxaca, Mexico, and to evaluate components of yield
and germination characteristics and seed dormancy of Amelanchier denticulata.
Amelanchier nervosa and Amelanchier denticulata samples and
morphological characters were used...
The relationships between black-tailed deer (Odocoileus hemionus columbianus) and Roosevelt elk (Cervus elaphus roosevelti) herbivory and understory vegetation in unmanaged forests in Olympic National Park were studied from 1985 - 1989. From 1985 to 1986 I studied the impact of cervid exclusion on shrub, fern, and forb forage quality, tannin...
The overall purpose of this study was to examine the root and shoot development of
Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings at two distinct time
periods in seedling establishment (after I and 3 growing seasons) in response to
fertilizer, stock size, vegetation control, and soil moisture treatments. Two separate
Deforestation, accelerated soil erosion, and land degradation are serious problems in Ethiopia. The uncontrolled removal of natural forests, demographic pressures and cyclical drought has aggravated the situation, resulting in massive environmental degradation and a serious threat to sustainable agriculture and forestry. To overcome these problems efforts have been made to...