Rozprawy doktorskie na temat „Grazing”
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Alshehabi, Abbas. "Grazing X-Ray Analysis". 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157580.
Pełny tekst źródłaClaire, Olivia Mary. "Effect of Time of Supplementation on Performance and Grazing Behavior of Grazing Steers". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/98826.
Pełny tekst źródłaMaster of Science
Grazing beef cattle tend to follow a general pattern of grazing, rumination, and digestion that coincides with their environment and the time of year. Backgrounded cattle managed in pasture-based systems are traditionally offered supplemental feedings in the morning. However, this practice could be decreasing how efficiently cattle utilize forage resources. Natural grazing behaviors are more intense preceding the heat of the day and interruption of morning grazing bouts could decrease forage intake by causing cattle to come to the feeder to consume supplement feedings. To examine how feeding time potentially influences performance and grazing behavior of backgrounded beef cattle, 52 crossbred beef steers 7 to 8 months of age and weighing 243 kg were grazed on tall fescue pastures at the Southwest Virginia Agricultural Research and Extension Center from October 1 to November 8, 2019. Cattle were supplemented with either a commodity blend or cracked corn mixed with an intake limiter. Cattle were sourced from 4 local producers and allotted to 9 pastures by body weight (BW) and source. Pasture groups were randomly assigned to 1 of 3 treatments (3 pastures per treatment): 1) steers hand-fed supplement at 0930 h (AM), 2) steers hand-fed supplement at 1330 h (PM), or 3) steers fed a self-feeder supplement with an intake limiter (SELF). Hand-fed groups were fed a commercial commodity blend (38% corn gluten feed pellets, 30% cracked corn, 22% soy hull pellets, and 10% dried distillers grains) daily at 1.5% BW on an as fed basis. The SELF supplement was a blend of 70% cracked corn and 30% of an intake limiter-containing pellet that was formulated to maintain voluntary supplement intake at 1.5% BW on an as fed basis. Adjustments were made to the average BW of pasture groups, following three interim weigh dates at d 11, d 21, and d 30, to keep intake levels accurately at 1.5% BW. Flesh condition scores (FCS) were assigned on a scal of 1 to 9, with 1 considered emaciated and 9 excessively fat. 12th rib fat thickness (FT) was measured using an Aloka 500SC ultrasound. Both measurements were taken on the first and final day of the experiment. Motion-sensing cameras were installed in each pasture to capture pictures every one-minute following motion detection. Subsequent pictures were used to analysis the number of feed and water visits, along with time of day, in an attempt to characterize intake behavior. There were no major differences seen by treatment groups for BW, flesh condition score, DMI, ADG, and backfat thickness. Cattle on the SELF treatment had greater G:F than AM, with PM cattle being intermediate and not different than either. Steers with access to a self-feeder visited the feeder more than double the number of times in a 24 h period than either of the hand supplemented group. Despite differences in observed cattle behavior, any disruption in natural grazing behavior did not negatively influence performance of backgrounded steers.
Rotheray, Timothy Daniel. "Invertebrate grazing during mycelial interactions". Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54800/.
Pełny tekst źródłaRoss, Claire Armine. "Ammonia deposition from grazing animals". Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288069.
Pełny tekst źródłaJenner, Mark W. "Economics of annual grazing systems /". free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9717179.
Pełny tekst źródłaMarberg, Mikael. "Climate, grazing and plant interactions : Does climate and grazing shape plant interactions in alpine environments?" Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-75722.
Pełny tekst źródłaMoore, Emily Kathryn. "Red deer (Cervus elaphus) grazing on vegetation mosaics : grazing patterns and implications for conservation management". Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10488.
Pełny tekst źródłaGibigaye, Adam Boukary Nagnimi Idrissou Bio Imorou. "Les aspects socio-economiques des champs fourragers du projet promotion élevage Atacora cas des sous-préfectures de Kouande et Ouassa-Pehunco /". [Benin] : Université nationale du Bénin, 1991. http://catalog.hathitrust.org/api/volumes/oclc/37686716.html.
Pełny tekst źródłaBruce, David R. A. "Evaluation for grazing tolerance in alfalfa". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ41683.pdf.
Pełny tekst źródłaFallows, M. S. "Rabbit grazing : An inter-disciplinary approach". Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382830.
Pełny tekst źródłaHerringshaw, Andrew Lee. "Evaluation of greenhouse gas emissions from three dairy production systems in Iowa-conventional, grazing, and combination conventional/grazing". [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1475927.
Pełny tekst źródłaIng, James. "Near grazing dynamics of piecewise linear oscillators". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24711.
Pełny tekst źródłaZaitov, Alisher. "Internet of things for monitoring grazing animals". Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196213.
Pełny tekst źródłaSvenska lantbruksndustrin är väl känt för sin rättvisa djurhantering och ekoloiska metoder, den höga standared kommer till en priset av hårda stränga regler. Lagar infördes för att hålla en låg användningsnivå av antibiotika och giftiga ämnen bland jordbruksindustrin. Vilket sätter jordbrukare under press och kräver dem att hålla ett extra gott öga på sina djur för att undvika sjukdom och skador på sina djur. Detta examensarbete fokuserar på att undersöka möjligheten att hålla låg användning av antibiotika men bibehålla den höga standarder genom att införa ny teknik som kan hjälpa bonden att övervaka sina djur och hålla dem friska. Målet med denna examensarbete är att utveckla en system prototyp som övervakar betande djur och hjälper bonden att upptäcka skador och sjukdomar i ett tidigare skede. För att systemet ska vara lönsamt och användbart för jordbrukaren behöver den hålla en låg strömförbrukning och komma till ett överkomligt pris. Den genomförda systemlösningen bygger på ett trådlöst sensornätverk som samlar in data om esitmerad position av djuret i betesmarken, interaktionsmönster och omgivnings sensordata av miljön. Prototypen testas med simuleringar, tester i labmiljö samt fälttester med kor på en gård i norra Sverige. Arbetet avslutas med utvärderingar av prototypen baserat på systemkrav, skalbarhet och kostnad.
Herrero, Mario. "Modelling dairy grazing systems : an integrated approach". Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/28229.
Pełny tekst źródłaMcGinley, Susan. "Western Grazing Fees: Studying Perceptions and Realities". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/622377.
Pełny tekst źródłaBagchi, Sumanta. "Ecology of the Trans-Himalayan grazing ecosystem". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2009. http://wwwlib.umi.com/cr/syr/main.
Pełny tekst źródłaYoung, Don W. "The History of Cattle Grazing in Arizona". Arizona-Nevada Academy of Science, 1998. http://hdl.handle.net/10150/296478.
Pełny tekst źródłaHerron, L. E. "Quantifying the impact of grazing by wild rabbits and conservation grazing by cattle on sand dunes in Northern Ireland". Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676515.
Pełny tekst źródłaCleys, Jake Robert. "Effects of Grazing of Reed Canarygrass (Phalaris arundinacea) in Restored Wet Meadows in the Northern Tall Grass Prairie". Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31553.
Pełny tekst źródłaMuduva, Theodor Kupembona. "Grazing rights in communal areas of a post-independent Namibia: a case study of a grazing dispute in western Kavango region". Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/4108.
Pełny tekst źródłaThis dissertation aims at understanding the legal implications of a grazing dispute that was reported in the western Kavango Region a few years after Namibia’s Independence in 1990. This dispute which was between Ovawambo cattle owners and herders from the Ohangwena and Oshikoto regions and the local Vakwangali community members (represented by the UKTA) was reported in 1992 (other reports suggest that it might even have originated as early as the 1960s and 1980s), when it was said that the Ovawambo cattle owners and herders with their hundreds of cattle had entered into western Kavango “illegally” in search of grazing. The Ovawambo cattle owners and herders were first charged in 2005 and were eventually evicted in 2009. This dissertation looks at how legislation was used to deal with the conflict and investigates the impacts of the court order on all parties involved. The methodology employed during this study was predominantly qualitative, mainly utilising individual interviews and focus group discussions with the participants. This study found that the Government of Namibia had delayed acting on the grazing dispute for mainly political reasons. The study also found that many herders had indeed entered western Kavango Region illegally because they could not provide any letters of consent from the Ukwangali Traditional Authority (UKTA); many herders also admitted that there were no written agreements between themselves and the UKTA. The research also found that although the eviction orders were issued to all the herders, some still remained in the area; this selective application of the law rendered the eviction order somewhat ineffective. The study found that some local or affected community members were satisfied with the consequences of the eviction order and reported positive results regarding their farming activities such as better grazing and improved yields in their crop fields. Other community members, however, were disappointed by the refusal of certain herders to vacate the area, as well as by the failure of the government to ensure that all the herders had left the area.
Mphinyane, Wanda Nchidzi. "Influence of livestock grazing within piospheres under free range and controlled conditions in Botswana". Diss., Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-09042001-102434.
Pełny tekst źródłaBoland, Holly Terry. "Grazing Behavior of Beef Steers Grazing Endophyte-Infected, Endophyte-Free, and Novel Endophyte Infected Tall Fescue, and Lakota Prairie Grass". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34557.
Pełny tekst źródłaMaster of Science
Tolleson, Douglas Ray. "Physiological indicators of tick-induced stress in grazing". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2594.
Pełny tekst źródłaHubbard, John Andrew. "Fire-grazing interactions in a mixed grass prairie". Diss., [College Station, Tex. : Texas A&M University, 2003. http://hdl.handle.net/1969.1/156.
Pełny tekst źródła"Major Subject: Rangeland Ecology and Management" Title from author supplied metadata (record created on Jul. 18, 2005.) Vita. Abstract. Includes bibliographical references.
Keren, Ilai Naftaly. "Thermal balance model for cattle grazing winter range". Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/keren/KerenI0805.pdf.
Pełny tekst źródłaBrown, Peter Robert, i n/a. "Pasture response following rabbit control on grazing land". University of Canberra. Resource & Environmental Science, 1993. http://erl.canberra.edu.au./public/adt-AUC20061113.144813.
Pełny tekst źródłaMadibela, Othusitse Ricky. "Protein nutrition of livestock grazing high quality pasture". Lincoln University, 2010. http://hdl.handle.net/10182/1571.
Pełny tekst źródłaFranklin-McEvoy, Jim. "Improving the performance of sheep grazing on saltbush /". Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09AB/09abf8312.pdf.
Pełny tekst źródłaStiles, Maria. "Evaluation of the Persistence of Grazing Alfalfa Varieties". TopSCHOLAR®, 2002. http://digitalcommons.wku.edu/theses/638.
Pełny tekst źródłaMartin, Janet Heather. "The feeding of supplementary forage to grazing sheep". Thesis, Bangor University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364559.
Pełny tekst źródłaJohnston, Mark A. "Rabbit grazing and the dynamics of plant communities". Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/11781.
Pełny tekst źródłaNeil, Scott Joseph. "Effects of Phosphorus Supplementation on Grazing Beef Cattle". Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/63922.
Pełny tekst źródłaMaster of Science
Soriano, Felix Diego. "Grazing and Feeding Management of Lactating Dairy Cows". Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36896.
Pełny tekst źródłaMaster of Science
Kincheloe, Janna Jo. "Variation in supplement intake by grazing beef cows". Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/kincheloe/KincheloeJ04.pdf.
Pełny tekst źródłaColusso, Patricia. "Evaluating Virtual Fence Technology for Grazing Dairy Cows". Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/27782.
Pełny tekst źródłaRuyle, George, Lamar Smith i Phil Ogden. "Strategies for Managing Grazing Allotments on Public Lands". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/144725.
Pełny tekst źródłaSmith, S. E., G. H. S. Rodrigues, D. M. Conta i L. McKinley. "Development of Grazing-tolerant Alfalfa for the Southwest". College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/200829.
Pełny tekst źródłaMóring, Andrea. "Process-based modelling of ammonia emission from grazing". Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/22072.
Pełny tekst źródłaShebala, Rudy R. "Horses and Grazing on the Navajo Indian Reservation". Thesis, University of Idaho, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10788329.
Pełny tekst źródłaFrequent droughts are common and extreme precipitation is a normal weather pattern for the Navajo country and has been for almost 6000 years. The Navajo do not abandon the often that drought stricken areas demonstrating their ability adapt to extreme weather conditions. For almost 300 years, the Navajo, while in a state of constant warfare with many different surrounding peoples, continued to develop and grow as a tribe, while living off of livestock, farming and hunting. Currently open for public review and comment is a new proposed Navajo Rangeland Improvement Act of 2014. It is the people, the tribal citizen’s needs that need administration.
Wheeler, Alan David. "Impacts of grazing systems on Nama Karoo phytodiversity". Thesis, Cape Technikon, 2003. http://hdl.handle.net/20.500.11838/2030.
Pełny tekst źródłaThe study was carried out on two adjacent farms on the plains of the Nama Karoo near Beaufort West. The impacts of three grazing treatments (a) zero grazing (b) non-selective grazing (c) conventional grazing, on plant diversity and certain vegetation parameters were compared. Unpredictable and variable rainfall and major disturbance events such as droughts drive vegetation change in the Nama Karoo. Major recruitment events are rare and can determine Karoo vegetation composition for many years. The diversity of plant species plays an important role in determining vegetation composition during major recruitment events and following drought or disturbance such as grazing. Grazing can influence the composition, abundance and seed production of Karoo plants and in so doing influence the future abundance of desirable and undesirable forage species. These changes may only become evident over long periods, but small changes in vegetation as a response to grazing treatment can accumulate considerably over time.On the farm Elandsfontein, studies have shown that non-selective grazing leads to a higher plant turnover rate, resulting in more vigorous and productive plants, and improved ecosystem functioning. However there is no evidence of this grazing system promoting or reducing plant diversity. The aim of this study was to test whether the non-selective grazing system promoted or reduced plant diversity compared to no grazing and conventional grazing. The hypothesis was that there were no differences between the grazing treatments in terms of plant diversity or any of the vegetation parameters measured. To evaluate this hypothesis, plant data were collected from the three grazing treatments using the Modified-Whittaker vegetation sampling method. The method was further modified for this study to allow for accurate abundance measurements rather than estimates, and an increased area for recording species richness. Using various diversity indices that incorporate species richness and the proportional abundance of species, plant diversity values for each treatment were obtained. No differences in terms of plant diversity were found between the treatments. A significant difference between treatments was found in the density of plants, particularly in perennial grasses and shrubs. Canopy cover percentage did not differ for individual species or as total cover between the treatments.
Connell, Janice T. "The effect of grazing management on the spatial heterogeneity of a perennial ryegrass sward and the utilisation by grazing dairy cows". Thesis, University of Glasgow, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404380.
Pełny tekst źródłaNekhofhe, Avhasei Justice. "Relationship between temparament and linear body parameters of beef cattle under communal grazing system". Thesis, Port Elizabeth Technikon, 2002. http://hdl.handle.net/10948/113.
Pełny tekst źródłaCairns, Marie Clare. "An investigation into the feeding behaviour and diet selection of the domestic horse". Thesis, De Montfort University, 2002. http://hdl.handle.net/2086/4312.
Pełny tekst źródłaCrawford, A. D. "The effect of breed of dairy cow on oestrous behaviour, fertility and animal performance". Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269021.
Pełny tekst źródłaMüller, Katrin [Verfasser]. "Impact of grazing intensity and grazing system on herbage quality and performance of sheep in the Inner Mongolian steppe, China / Katrin Müller". Kiel : Universitätsbibliothek Kiel, 2010. http://d-nb.info/1019984791/34.
Pełny tekst źródłaMashiri, Fadzayi Elizabeth. "Long-Term Dynamics in Plant Abundance and Spatial Variation in Response to Grazing Systems, Precipitation and Mesquite Cover". Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/193979.
Pełny tekst źródłaMotta, Marcelo Jorge de Assis. "Equivalent impedance of rough surface at low grazing angles". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA369420.
Pełny tekst źródła"September 1999". Thesis advisor(s): R. Janaswamy. Includes bibliographical references (p. 77). Also avaliable online.
Sørensen, L. I. (Louise Ilum). "Grazing, disturbance and plant soil interactions in northern grasslands". Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514291395.
Pełny tekst źródłaBurlison, Alison Jean. "Sward canopy structure and ingestive behaviour in grazing animals". Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/27546.
Pełny tekst źródłaHamilton, Adam Stuart. "The role of microzooplankton grazing in trace element biogeochemistry". Thesis, University of Portsmouth, 2013. https://researchportal.port.ac.uk/portal/en/theses/the-role-of-microzooplankton-grazing-in-trace-element-biogeochemistry(d264b6dc-b0fc-4e05-a60f-c3592fdb74d6).html.
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