@conference {50549, title = {Collaborative animal science research: impacts of agriculture and trade policies on cross-border rangeland research and management}, booktitle = {Society for Range Management, 58th Annual Meeting and Trade Show}, year = {2005}, month = {February 5, 2005}, pages = {Paper No. 115}, address = {Fort Worth, TX}, abstract = {In sharing a common boundary, Mexico and the United States also shares common landscapes and an agricultural economy that is inextricably linked. Due to the high degree of connectedness between these countries, factors that affect one country also affect the other, either directly or indirectly. Current problems in the border region include extended drought, land degradation, and depletion of essential resources such as water. These problems are exacerbated by ensconced political and social systems resistant to change. The implications of these events are profound, and often referred to as being near catastrophic. Collaborative research between Mexican and US researchers offers numerous benefits by combining human and material resources to solve common problems. Despite these benefits, language, social customs, and political policies can create barriers to collaborative efforts that reduce the effectiveness and the overall number of collaborative efforts. When anticipated and appropriately planned for, these barriers can effectively be dealt with. We discuss these potential barriers and how to address them by relating our experiences with collaborative Mexican-US projects on the conservation and use of northern Mexican criollo beef cattle breeds in semiarid and arid environments.}, keywords = {agriculture and trade policies, animal science research, cross-border, management, rangeland, research}, author = {E.L. Fredrickson and G. Bezanilla} } @conference {50550, title = {Drought as a Dynamic Process: Recovering from Long Term Rangeland Impacts of Drought}, booktitle = {2005 3rd Annual Drought Summit: "The Drought: It Ain{\textquoteright}t OVer {\textquoteright}Til It{\textquoteright}s Over, and It Ain{\textquoteright}t Over!", USDA Natural Resources Conservation Service}, year = {2005}, month = {October 6, 2005}, pages = {pp. 20}, publisher = {University of New Mexico Continuing Education Center}, organization = {University of New Mexico Continuing Education Center}, address = {Albuquerque, NM}, abstract = {Central tenets of living with drought rangelands are complex, often unpredictable lanscapes, in which drought is a constant feature. The effects of drought are dependent on prior conditions that are largely the result of the continual interplay of humans and their environment. By investing in human capital, and the large social context, we can better manage this interplay to meet a diversity of needs. It is knowledge, and the creation of knowledge, through monitoring and scientific investigation, that allows land management professionals to better adapt and innovate to ever chaning conditions. Likewise, the greater society provides the ethic and the needed flexibility for the land manager to operate within. Without first adressing this often ignored framework, use of other management tools are likely to be costly, have short-lived benefits, and uninteded consequences.}, keywords = {drought management, long term, rangeland}, author = {E.L. Fredrickson} } @article {51479, title = {Influence of ruminally dispensed monensin and forage maturity on intake and digestion}, journal = {Journal of Range Management}, volume = {46}, number = {3}, year = {1993}, note = {Permission to post articles granted by the Society for Range Management; www.rangelands.org.}, month = {1993}, pages = {214-220}, abstract = {

Eight ruminally cannulated crossbred steers (average weight 336 kg) grazing native blue grama (Bouteloua gracilis\  [H.B.K.]) rangeland were used in a repeated measures design to evaluate effects of monensin ruminal delivery devices (MRDD) and forage phenology on ruminal digestion.\  Three periods were assessed: mid-August (Aug.), early October (Oct.), and mid-November (Nov.).\  One MRDD was placed in the reticulum of 4 steers via the ruminal cannula 21 days before each period.\  Intake was estimated using total fecal collections.\  Diet samples were collected using 3 esophogeally fistulated steers. Ruminal fill was measured by ruminal evacuation; rate and extent of in situ ruminal neutral detergent fiber disappearance were estimated before ruminal evacuations.\  Ruminal passage rates, retention time, and apparent total tract organic matter digestibility were estimated using indigestible neutral detergent fiber.\  In vitro organic matter disappearance of esophageal masticate did not differ (P\>.05) in Aug. and Oct. (average of 53.7\%), but declined (P\<.05) in Nov. (48.7\%), whereas organic matter digestibility was greater (P\<.10) in Aug. (62.3\%) than in either Oct. (55.2\%) or Nov. (53.9\%).\  Release of monensin from the bolus (68 mg day-1) was less than expected (100 mg day-1).\  Intake, organic matter digestibility, ruminal passage rates, retention time, pH, and ammonia were not affected (P\>.10) by MRDD.\  In situ neutral detergent fiber disappearance at 96 hours was decreased (P\<.10) by MRDD (68 vs 65\% for control and MRDD, respectively).\  As the grazing season progressed, intake declined (P\<.10), whereas ruminal fill and retention time increased (P\<.05), and passage rate of indigestible neutral detergent fiber decreased (P\<.05). At 48 hours in situ neutral detergent fiber was greatest (P\<.05) in Aug. and least (P\<.05) in Nov.

}, keywords = {beef, cattle, digestion, forage quality, rangeland}, url = {/files/bibliography/401.pdf}, author = {E.L. Fredrickson and Galyean, M.L. and Branine, M.E. and Sowell, B.F.} }