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Tesis sobre el tema "Pastures"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Parish, Roberta. "The role of disturbance in permanent pastures." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27505.

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This thesis investigates how small disturbances influence community structure in three permanent pastures. Small disturbances play an important role in providing spatial heterogeneity that permits new recruits to enter populations in closed sward communities, thereby promoting diversity and species co-existence. The thesis has four components: the first two are based on observation and measurement of the occurrence of small disturbances, molehills and dung pats, in three pastures. Within pasture seasonal changes in disturbance regime were related to changes in patterns of species abundance by

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2

Latta, Roy A. "Improving medic pastures in pasture-wheat rotations in the Mallee district of North-Western Victoria /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09A/09al364.pdf.

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3

Williamson, Jessica A. "Animal and Pasture Responses to Grazing Management of Chemically Suppressed Tall Fescue in Mixed Pastures." UKnowledge, 2015. http://uknowledge.uky.edu/pss_etds/57.

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Treatment of endophyte-infected tall fescue [Lolium arundinaceum (Schreb.) Darbysh] with the broad leaf herbicide Chaparral® can mitigate fescue toxicosis and enhance forage quality by suppressing seedhead emergence. Applying the herbicide to fescue pastures also reduces forage mass and promotes severe spot grazing when pastures are continuously grazed. A grazing experiment was conducted with steers (2013) and heifers (2014) to evaluate animal and plant responses in fescue-bluegrass (Poa pratensis L.) mixtures treated with Chaparral to determine the effects of grazing management on pasture car

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4

Schlueter, David Henry. "Overseeding Clovers into Permanent Pastures." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/34719.

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Benefits of establishing legumes into permanent pastures have been well studied. Successful establishment of legumes in pastures can be challenging, however, and more information is needed about different seeding methods and variables that affect legume establishment. A pasture and a small plot experiment were conducted in Blacksburg, Va from 2009 to 2011to gain better understanding of how seeding method and management variables affected red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) establishment into permanent cool season grass pasture and sod. In the pasture exper

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5

Popp, Jan D. "Beef production on alfalfa-grass pastures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23911.pdf.

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6

Paterson, R. T. "The introduction of legumes into degraded tropical pastures." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380018.

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7

Reeves, Megan. "Milk production from kikuyu (Pennisetum clandestinum) grass pastures." Thesis, Faculty of Veterinary Science, 1997. http://hdl.handle.net/2123/14526.

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8

Valdez, Zamudio Diego. "Application of Computer Modeling in Buffelgrass Pastures Studies." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195018.

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Pastures established using buffelgrass (Cenchrus ciliaris L.) have shown heterogeneous responses in terms of forage production and permanence. A good alternative for determining establishment sites and predict trends in buffelgrass conditions is the use of simulation models. The objectives of this research were to determine the factors that regulate successfulness in buffelgrass pastures and to develop a model to determine suitability in areas managed for buffelgrass pastures, based on environmental, ecological, and management variables. Above ground biomass production was considered to determ

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9

Kempster, Valerie N. "Soil microbes as potential control agents for plant-parasitic nematodes in pasture /." Title page, contents and summary only, 2000. http://web4.library.adelaide.edu.au/theses/09ACP/09acpk32.pdf.

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10

Tonmukayakul, Nop. "Water use efficiency of six dryland pastures in Canterbury." Lincoln University, 2009. http://hdl.handle.net/10182/1498.

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The annual and seasonal water use efficiency of six pasture combinations were calculated from the ‘MaxClover’ Grazing Experiment at Lincoln University. Pastures have been established for six years and are grazed by best management practices for each combination. Measurements for this study are from individual plots of four replicates of ryegrass (RG)/white clover (Wc), cocksfoot (CF)/Wc; CF/balansa (Bal) clover; CF/Caucasian (Cc) clover; CF/subterranean (Sub) clover or lucerne. Water extraction measurements showed soils for all dryland pastures had a similar plant available water content of

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11

Söderström, Bo. "Farmland birds in semi-natural pastures : conservation and management /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5463-8.pdf.

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12

Diamond, Juanita F. (Juanita Florence). "Integrated control of Cirsium arvense (L.) Scop. in pastures." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61205.

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Cirsium arvense (L.) Scop. (Canada thistle) is a persistent perennial pasture weed in Eastern Canada. Single control measures such as cultural, chemical, and biological methods are not effective in long term reduction of the weed population. The objectives of this research project were to evaluate the efficacy of various traditional control methods and to attempt to integrate them.<br>The effectiveness of Urophora cardui L. as a biological control agent is limited due to a lack of synchrony between the agent and the weed. This can be improved through integration with herbicides or mowing in ti

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13

Edwards, Meghan Elizabeth. "SPINY AMARANTH CONTROL AND AMINOPYRALID PERSISTENCE IN KENTUCKY PASTURES." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/27.

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Spiny amaranth is a problematic weed of heavily grazed pastures in Kentucky and surrounding states. The first objective was to evaluate spiny amaranth control when herbicides are applied before and after emergence. Spiny amaranth seed collected in 2008 were seeded in rows in the fall (November) and the following spring (March) in fields located near Lexington and Princeton, KY. Treatments consisted of five application dates and five herbicides plus an untreated control arranged in a split-split plot design. The following parameters were measured: fresh weight, plant height and percent visual c

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14

Bowen, Maree Kim. "Efficiency of microbial protein production in cattle grazing tropical pastures /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17401.pdf.

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15

Mehrhoff, Loyal Archie. "The evolutionary consequences of interactions between plants in permanent pastures." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29244.

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The evolutionary consequences of interactions between neighbouring plants of Trifolium repens and three selected grasses were studied in a series of different-aged pastures. Experiments were conducted at three different levels of interaction; between species, between populations, and between individuals. The primary objective was to examine under natural conditions the relevance of two revolutionary theories of species coexistence - niche differentiation and competitive equivalence. Additional studies focused on the differentiation of T. repens subpopulations in response to neighbouring grasse

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16

Hooper, Elaine R. "Factors affecting natural tree regeneration in abandoned pastures in Panama." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0032/MQ64371.pdf.

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17

Phelps, Celina. "Bacterial Source Tracking of a Watershed Impacted by Cattle Pastures." MSSTATE, 2006. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11072006-130427/.

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Pathogenic microorganisms introduced by cattle may be transported to distant locations via watershed runoff. Escherichia coli, Enterococcus spp., and Streptococcus spp. are a few species present in runoff from land impacted by humans, cattle, and wildlife. Initial data reveals that E. coli concentrations in water are greater in areas impacted by cattle than by humans. And, wildlife contributes greater concentration fluctuations than either humans or cattle. When cattle are removed from a pasture, the bacterial concentrations rapidly decrease; however, slight variations in cattle herd size do n

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18

Hooper, Elaine R. "Factors affecting natural tree regeneration in abandoned pastures in Panama." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30667.

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Our objective was to identify the major barriers to natural regeneration of tree species in abandoned Panamanian pastures as a first step in formulating management strategies to facilitate forest recovery. We tested whether fire, seed dispersal, and the presence of an introduced grass, Saccharum spontaneum L., were barriers to forest regeneration. We examined growth, survival, and density of both experimentally-introduced and naturally-regenerating tree seedlings using a series of multifactorial experiments.<br>We found that seed dispersal limits forest regeneration. Large-seeded species have

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19

Silva, Rodrigo GregÃrio da. "Intensification of milk production in pastures in the humid tropics." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7392.

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FundaÃÃo de Amparo Ã Pesquisa do Estado do CearÃ<br>Objetivou-se com esse trabalho avaliar os efeitos da intensificaÃÃo da produÃÃo de leite, via nÃveis de intensificaÃÃo do sistema, em pastagens de capim-mombaÃa (Panicum maximum Jacq. cv. MombaÃa) no trÃpico Ãmido, durante o perÃodo das Ãguas. Os tratamentos consistiram de quatro nÃveis de intensificaÃÃo, determinados pela combinaÃÃo de nÃveis de adubaÃÃo e nÃvel de produÃÃo dos animais. Foram eles, na sequÃncia crescente de intensificaÃÃo: 1Â Â adubaÃÃo com 400 kg de NÃha-1Ãano-1, com vacas de baixa produÃÃo; 2ÂÂ adubaÃÃo com 800 kg de NÃha-

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20

Gross, Kathy Lynn. "Nutritional status of beef cows grazing reclaimed strip mined pastures." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90930.

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A series of four trials over the grazing season were conducted to evaluate the nutritional status of beef cows grazing reclaimed strip-mined pastures in southwestern, Virginia. Blood samples, esophageal fistula forage samples and hand plucked forage samples were taken in each trial. An external marker, Ytterbium, and an internal marker, indigestible neutral detergent fiber (INDF) were used to estimate organic matter intake, fecal output and digestibility. In addition to samples taken during the trials, blood samples and hand plucked forage samples were taken monthly for 11 mo prior to the tria

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21

Lazzarotto, Alessia <1996&gt. "John Steinbeck's The Pastures of Heaven: an Analysis of Characterization." Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/21346.

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The Pastures of Heaven is John Steinbeck’s second published literary work. It was released in 1932 when only few knew the writer’s name: in fact, only seven years later he would become the well-known author of The Grapes of Wrath, one of the greatest American novels. The Pastures of Heaven belongs in the genre of the short story cycle, although the writer himself referred to these individual portraits as “tiny novels”. Primarily, what these stories have in common is the underlying unity of place and the recurring presence of the Munroe family, together with various thematic threads such as the

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22

Dainese, Matteo. "Classification and biodiversity patterns in pastures of province of Trento." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3421544.

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In the Italian Alps, summer pastures are still managed in traditional ways, which maintain important grassland habitats of many species, although the number of pastures has declined drastically over the past few decades. Research on alpine pastures is important in many respects. From the aspect of nature protection, pastures represent a habitat for numerous plant and animal species; and, through their diversity, contribute greatly to the biodiversity and scenic value of the area. From the economic standpoint, grasslands are a source of feed for stock, a habitat for medicinal and melliferous pl

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23

Gekara, Ondieki J. "Effect of sward height and concentrate supplementation on forage dry matter intake, digestibility and grazing time of spring-calving beef cows." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=966.

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Thesis (M.S.)--West Virginia University, 1999.<br>Title from document title page. Document formatted into pages; contains v, 44 p. Vita. Includes abstract. Includes bibliographical references (p. 30-35).

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24

Frost, William E. "The ecology of cereal rust mite Abacarus hystrix (Nalepa) in irrigated perennial dairy pastures in South Australia /." Title page, contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phf9398.pdf.

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25

Dubeux, Júnior José Carlos B. "Management strategies to improve nutrient cycling in grazed Pensacola bahiagrass pastures." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011202.

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26

Busqué, Juan. "Structure, morphogenesis and patterns of defoliation of Brachiaria decumbens Stapf. pastures." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/27624.

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This study aimed to contribute to the understanding of the morphogenesis and structure of signal grass (<i>Brachiaria decumbens</i> Stapf.) pastures, and how they are affected by the environment and cattle defoliation. A diagrammatic model was adopted to identify and relate the major morphogenetic and structural characteristics at different levels of organisation of the sward: phytomer, tiller, plant and population. The morphogenetic characteristics studied were leaf elongation rate (LER) and internode elongation rate (IER) at the phytomer and tiller level, leaf senescence rate (LSR) and leaf

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27

Rutley, Bruce David. "Management, growth and performance of bison (Bison bison) on seasonal pastures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34828.pdf.

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28

Melland, Alice Rowena. "Pathways and processes of phosphorus loss from pastures grazed by sheep /." Connect to thesis, 2003. http://eprints.unimelb.edu.au/archive/00002204.

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Thesis (Ph.D.)--University of Melbourne, School of Agriculture and Food Systems,Institute of Land and Food Resources, 2004.<br>Typescript (photocopy). Includes bibliographical references (leaves 249-282).

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29

Hopkins, D. W. "Nitrogen transformations in upland pastures on stagnogley and stagnohumic-gley soils." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383974.

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30

Castelo, Ipiales Maria Yolanda. "Seasonal changes in herbage mass and quality of legume-bahiagrass pastures." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001305.

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31

Thomas, Dean Timothy. "Selective grazing by sheep to improve the control of weeds of crops /." Connect to this title, 2005. http://theses.library.uwa.edu.au/adt-WU2006.0041.

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32

Cook, Amanda. "The growth of, and interactions between, pasture species in relation to soil physical properties." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU543712.

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Two glasshouse experiments were conducted to; (i) investigate the effects of soil mechanical impedance (MI) on individually grown plants of Lolium perenne, Trifolium repens (sown pasture species) and Agrostis capillaris (indigenous species); and (ii) investigate the effects of MI on the growth of L. perenne and A. capillaris grown in swards comprising pure stands and mixtures. The individually grown plants showed a significant (P0.05) reduction in dry matter accumulation in an impeding treatment (2.3 MPa PR) compared to a control (0.25 MPa) for all species. Each species showed significant (P0.

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33

Pihlgren, Aina. "Small-scale structures and grazing intensity in semi-natural pastures : effects on plants and insects /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200713.pdf.

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34

Tosi, Hugo Ricardo. "Dairy cattle breeding performance when grazing the high protein pastures of Uruguay." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ35047.pdf.

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35

Baur, Ivo. "Analyzing and modeling the use of common property pastures in Grindelwald, Switzerland." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-182953.

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Problem. More than ever, some of the biggest challenges to society involve governance of natural resources. From large-scale resource systems such as the rain forest and oceans to small-scale systems such as lakes or alpine pastures, cooperative efforts are required to ensure sustainable and yet productive use of natural resources. In Switzerland, the management of alpine pastures has for centuries been predominantly organized by local governance institutions, avoiding an overuse of the scarce resources. During the past decade, the use and maintenance of common property pastures (CPP) is decli

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36

Sottie, Edmund Tei. "Characterization of new sainfoin populations for mixed alfalfa pastures in western Canada." Thesis, Arts and Science, 2014. http://hdl.handle.net/10133/3417.

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A series of experiments were conducted to compare nine new sainfoin populations developed to persist in mixtures with alfalfa under a multiple-cut management. In trials at Lethbridge under rain-fed and irrigated conditions, new sainfoin populations produced higher (P<0.05) dry matter yields as compared to Nova sainfoin. New cultivars persisted for three production years in mixed stands with alfalfa accounting for >20% DM at each harvest. Condensed tannin concentrations in sainfoin were highest at the bud stage. One new sainfoin population, LRC-3519 seeded in alternate rows with alfalfa caused

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37

Timberlake, Caitlin. "Urea Formulations on the Productivity of Bermudagrass and Bermudagrass-White Clover Pastures." UKnowledge, 2015. http://uknowledge.uky.edu/pss_etds/70.

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Bermudagrass (Cynodon dactylon L.) is a perennial warm-season grass that is very responsive to nitrogen (N) fertilization. Excessive N applications have negative environmental consequences and make maintaining mixed swards difficult. This study determined the effects of enhanced efficiency (EE) N fertilizers and fertilizer rate on bermudagrass yields, nutritive values, and white clover persistence. Nitrogen sources included urea, urea formulated with Agrotain® (U+A), urea with Agrotain® and dicyandiamide (SuperU), a polymer-coated urea (ESN), ESN+urea (75% ESN, 25% urea), and methylene urea (M

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38

Dufour, Alexia. "Multiscale assessment of plant diversity in wooded pastures of the jura mountains." Besançon, 2006. http://www.theses.fr/2006BESA2059.

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La diminution de la biodiversité compte parmi les problèmes les plus préoccupants de notre époque. En terme de conservation, il est aujourd’hui primordial de mieux comprendre les mécanismes qui créent et maintiennent la biodiversité dans les écosystèmes naturels ou anthropiques. Cette étude a pour objectif d’améliorer cette compréhension dans un écosystème complexe, riche en espèces et à forte valeur patrimoniale, les pâturages boisés jurassiens. Elle vise à explorer des patrons spatiaux de biodiversité végétale et à tester de façon empirique des hypothèses théoriques ou issues de simulation c

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39

Sen, Sumit Srivastava Puneet Clement Prabhakar Thangadurai. "Runoff generation in pastures of the Appalachian plateau region of North Alabama." Auburn, Ala, 2009. http://hdl.handle.net/10415/1714.

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40

Stewart, R. Lawton. "Management intensity effects on animal performance and herbage response in bahiagrass pastures." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001200.

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41

Frances, Anne. "Establishment and management of native wildflowers on Florida roadsides and former pastures." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0022660.

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42

Briscoe, Jacob T. "Utilizing Legumes to Improve Production and Nutritive Value of Intermountain West Pastures." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7083.

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Pastures in the Intermountain Western United States mainly consist of cool-season grasses which lack production without supplemental nitrogen. Legumes provide nitrogen at reduced cost compared to nitrogen fertilizer. There is a need for proven methods of inter-seeding legumes into existing cool-season grass pastures as well as knowledge of how animals prefer legumes to grasses and how the nutritive value of forages change throughout the growing season. This research provides a resource for effective integration of legumes into pastures of the Intermountain West. Alfalfa, birdsfoot trefoil, and

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43

Bingham, Troy J. "Plant and Animal Performance in Tall Fescue and Tall Fescue/Legume Pastures." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/2769.

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Tall fescue is the one of most common grasses in irrigated pastures throughout the Intermountain West. Two limitations of tall fescue are a decrease in productivity during hot summer months and the need for supplemental nitrogen (N). The objective of this research was to compare tall fescue-alfalfa (TF+ALF), tall fescue-birdsfoot trefoil (TF+BFT), tall fescue-nitrogen fertilizer (TF+N), and tall fescue without nitrogen fertilizer (TF-N) on forage yield, nutritional quality, and livestock performance. Research plots were established at the Utah State University Pasture Research Facility in Lewi

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44

Murzabekov, Marat. "Political Pasture : A Governmentality Analysis of Community-Based Pasture Management in Kyrgyzstan." Doctoral thesis, Uppsala universitet, Kulturgeografiska institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-320303.

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This thesis seeks to understand the development and implementation of the community-based pasture management policy in Kyrgyzstan, which transferred the responsibility for pasture-use planning from state administrative organs to local community-based organizations. Using document analysis, this thesis contextualizes the emergence and evolution of the policy’s key premises, including the advantages of community-based management compared to state-centered management. Using interviews and observations, this thesis draws out individual experiences of herders, forestry service officials and the mem

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45

Séguin, Philippe 1974. "Pasture renovation : introduction of legumes in a grass dominated pasture with physical suppression of the resident vegetation." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27907.

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Herbicide sod suppression during pasture renovation by legume sod-seeding often results in the loss of potentially usable forage, weed encroachment, and inadequate glass-legume ratios. A study was conducted to investigate the viability of sod suppression by sheep grazing or mowing, as alternatives to herbicide, during pasture renovation with no-till seeding of red clover (Trifolium pratense L.) or white clover (Trifolium pratense L.). Sod suppression methods evaluated were: strategically timed mowing or sheep grazing to 5 or 10 cm at seeding and during legume establishment, or similarly manage

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46

Riffkin, Penelope A., of Western Sydney Hawkesbury University, and Faculty of Science and Technology. "An assessment of white clover nitrogen fixation in grazed dairy pastures of south-western Victoria." THESIS_FST_xxx_Riffkin_P.xml, 1999. http://handle.uws.edu.au:8081/1959.7/31.

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Australia is amongst the more efficient milk producers in the world.Milk production in the region of south-western Victoria relies mainly on rainfed white clover/perennial ryegrass pastures.As the demand for efficient and competitive milk production increases, the value of N2 fixation must be maximised. The objective of this thesis was to assess N2 fixation in grazed dairy pastures in south-western Victoria. Several tests and experiments were conducted and results noted. Studies revealed low white clover yields to be the major factor limiting N2 fixation in the region. For N2 fixation to have

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47

Riffkin, Penelope A. "An assessment of white clover nitrogen fixation in grazed dairy pastures of south-western Victoria." Thesis, [Richmond, N.S.W.] : University of Western Sydney, Hawkesbury, 1999. http://handle.uws.edu.au:8081/1959.7/31.

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Australia is amongst the more efficient milk producers in the world.Milk production in the region of south-western Victoria relies mainly on rainfed white clover/perennial ryegrass pastures.As the demand for efficient and competitive milk production increases, the value of N2 fixation must be maximised. The objective of this thesis was to assess N2 fixation in grazed dairy pastures in south-western Victoria. Several tests and experiments were conducted and results noted. Studies revealed low white clover yields to be the major factor limiting N2 fixation in the region. For N2 fixation to have

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48

Nurjaya, I. Gusti Made Oka. "Studies on the competitive ability of white clover (Trifolium repens L.) in mixtures with perennial ryegrass (Lolium perenne L.) : the importance of non-structural carbohydrate reserves and plant traits /." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09APSP/09apspi11.pdf.

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49

Doole, Graeme John. "Value of perennial pasture phases in dryland agricultural systems of the eastern-central wheat belt of Western Australia." University of Western Australia. School of Agricultural and Resource Economics, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0213.

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Over the past thirty years, price relativities and technological development have motivated an increase in the area of land allocated to cropping, as opposed to pasture production, throughout the central wheat belt of Western Australia. Nevertheless, reducing the proportion of pasture in these rotations has challenged the future productivity of farming systems in this area. First, the frequent application of selective herbicides for weed control in extended cropping rotations has promoted the development of herbicide resistance in a number of major agricultural weeds. Second, the primary use o

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50

Clough, Tim J. "Fate of urine nitrogen applied to peat and mineral soils from grazed pastures." Lincoln University, 1994. http://hdl.handle.net/10182/1030.

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This study has provided fundamental information on the fate of urine nitrogen (N) when applied to pasture soils. In this work the three pasture soils used were a Bruntwood silt loam (BW), an old well-developed (lime and fertilizer incorporated and farmed for more than 20 years) peat soil (OP) and a young peat (YP) which was less developed (farmed for about 10 years). Initial soil chemical and physical measurements revealed that the peat soils were acidic, had higher cation exchange capacities, had greater carbon:nitrogen ratios and were better buffered against changes in soil pH than the BW so

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