693,172 research outputs found
Timothy in Alaska: Characteristics, History, Adaptation, and Management
This report (a) summarizes the characteristics of timothy
(Phleum pratense L.) as a forage species, (b) reviews
briefly the history of its use in the U.S., and the history
of timothy evaluations and culture in Alaska, (c) compares
winterhardiness of alpine timothy (P. alpinum L.)
with common timothy, (d) compares physiological and
morphological characteristics of timothy cultivars from
widely divergent latitudinal origins and relates those
characteristics to winter survival, (e) compares planting
dates and different seeding–year harvest dates for seeding–
year forage production and effects on subsequent
winter survival and productivity, and (f) evaluates forage
production of established timothy under a broad array of
harvest schedules and frequencies, and compares the effects
of those harvest treatments on subsequent winter survival
and first–cut forage yield the following year.
All experiments were conducted at the University of
Alaska Agricultural and Forestry Experiment Station’s
Matanuska Research Farm (61.6oN) near Palmer in
southcentral Alaska
Timothy and timothy mixtures as a pasture crop
Despite the relatively low tolerance against grazing and peaked DM production, timothy can be used effiently for grazing, especially in mixtures with meadow fescue. The growth processes lead to specific management options, e.g. early turnout, high pre-grazing sward heights, flexible grazing systems with large variation in rotation length, and possibly part-time grazing
Perennial Grass Trials for Forage Purposes In Three Areas of Southcentral Alaska
Forage trials of seeded perennial grasses were conducted at four sites
in three areas of southcentral Alaska on soils with pH readings generally
below 5.5 (down to 4 .35) . Three trials were at forested locations and
one at a subalpine site. Each trial was sustained for three to five harvest
years under a two-harvest system. 'Engmo' timothy (Phleum pratense) ,
the standard forage grass on strongly acidic soils in the region, equaled
or, more often , exceeded the other grasses in first-harvest yields, but
often was surpassed in second-harvest yields. Grasses often substantially
exceeding timothy in second-harvest yields included reed canarygrass
(Phalaris arundinacea) and entries of tufted hairgrass (Deschampsia
caespitosa) and Bering hairgrass (D. beringensis), sometimes providing
more total yield than timothy. Some red fescues (Festuca rubra) and
'Nugget' Kentucky bluegrass .(Poa pratensis) also tended to surpass
timothy in second growth. Smooth bromegrass (Bromus inermis) failed
at sites with soil pH below 5.3, but persisted at one site with pH varying
from 5.3 to 5.7. 'Garrison' creeping foxtail (Alopecurus arundinaceus)
also failed at these sites; its close relative meadow foxtail (A. pratensis),
was better adapted to the strongly acidic sites. Indigenous polargrass
(Arctagrostis latifolia) about equaled or surpassed timothy in yield at
two of the sites, and bluejoint reedgrass (Calamagrostis canadensis) provided
comparable but somewhat lower yields.
Timothy tended to be higher in digestible dry matter than most grasses,
but near to below average in CP, P, K, and Ca concentrations. Some
deficiencies occurred in energy values (DDM) and, except for red fescue,
in Ca concentrations of first-harvest herbage relative to the requirements
of a growing 500-lb steer. Crude protein of second-harvest herbage was
deficient for many grasses at two sites, and DDM was marginal to low
for some, but especially for bluejoint reedgrass
Williamson on Modality
This special issue of the Canadian Journal of Philosophy is dedicated to Timothy Williamson's work on modality. It consists of a new paper by Williamson followed by papers on Williamson's work on modality, with each followed by a reply by Williamson.
Contributors: Andrew Bacon, Kit Fine, Peter Fritz, Jeremy Goodman, John Hawthorne, Øystein Linnebo, Ted Sider, Robert Stalnaker, Meghan Sullivan, Gabriel Uzquiano, Barbara Vetter, Timothy Williamson, Juhani Yli-Vakkur
What do philosophers do? A few reflections on Timothy Williamson's "The Philosophy of Philosophy"
Con una risposta di Timothy Williamson (pp. 135-37)
The First World Oil War (Book Review) by Timothy C. Winegard
Review of The First World Oil War by Timothy C. Winegar
Ecocriticism on the Edge: The Anthropocene as a Threshold Concept by Timothy Clark
Review of Timothy Clark\u27s Ecocriticism on the Edge: The Anthropocene as a Threshold Concept
Book Review: Women of Power and Grace: Nine Astonishing, Inspiring Luminaries of our Time
A review of Timothy Conway\u27s Women of Power and Grace: Nine Astonishing, Inspiring Luminaries of Our Time
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