Bibliografías temáticas / Temperate pastures

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Literatura académica sobre el tema "Temperate pastures"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 21 de febrero de 2023

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Artículos de revistas sobre el tema "Temperate pastures"

Kemp, D. R., and P. M. Dowling. "Towards sustainable temperate perennial pastures." Australian Journal of Experimental Agriculture 40, no. 2 (2000): 125. http://dx.doi.org/10.1071/ea98003.

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Naturalised pastures across the higher rainfall (>600 mm) perennial pasture zone of south-eastern Australia are less productive than they were, while sown pastures fail to maintain their initial levels of production. Several factors have contributed to this, including lack of knowledge of suitable grazing practices, weed invasion, increasing acid soils, rising water tables and poor management practices during droughts. A key issue in each case is the decline in perennial grass species which is both a cause and effect of the decline in productivity and sustainability of these ecosystems. Thi

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Pearson, C. J., R. Brown, W. J. Collins, K. A. Archer, M. S. Wood, C. Petersen, and B. Bootle. "An Australian temperate pastures database." Australian Journal of Agricultural Research 48, no. 4 (1997): 453. http://dx.doi.org/10.1071/a96095.

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A census of pasture types and their composition and attributes (e.g. purpose and carrying capacity) was carried out throughout southern Australia from June to October 1994. This paper describes the survey process and subsequent creation of an Australian temperate pastures database. Data were created for 562 local government areas (LGAs) from ‘desk estimates’ by trained agriculturists. They identified about 2500 pasture types, which were grouped into 120 standardised pasture categories. Some findings from the data are identified, namely the high relative importance on an area basis of unimprove

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Eyles, Alieta, Garth Coghlan, Marcus Hardie, Mark Hovenden, and Kerry Bridle. "Soil carbon sequestration in cool-temperate dryland pastures: mechanisms and management options." Soil Research 53, no. 4 (2015): 349. http://dx.doi.org/10.1071/sr14062.

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Permanent pastures, which include sown, native and naturalised pastures, account for 4.3 Mha (56%) of the national land use in Australia. Given their extent, pastures are of great interest with respect to their potential to influence national carbon (C) budgets and CO2 mitigation. Increasing soil organic C (SOC) mitigates greenhouse gases while providing other benefits such as pasture productivity, soil health and ecosystem services. Several management approaches have been recommended to increase C sequestration in pasture-based systems; however, results have proved variable and often contradi

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Lattimore, MAE. "Pastures in temperate rice rotations of south-eastern Australia." Australian Journal of Experimental Agriculture 34, no. 7 (1994): 959. http://dx.doi.org/10.1071/ea9940959.

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Legume-based pastures have long been an integral part of rice growing in the southern New South Wales irrigation areas and still offer potential to improve the productivity, profitability, and sustainability of the temperate rice-cropping system.This paper reviews both historical and current aspects of pastures in temperate rice rotations in southern New South Wales and highlights the importance of pastures in sustaining this cropping system as environmental pressures increase. Topics discussed include pasture species and rotations, their role in improving soil fertility and sustainability, th

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Vere, D. T., R. E. Jones, and M. H. Campbell. "Long-term change in the economic productivity of four major pasture categories on the south-eastern Tablelands of New South Wales." Rangeland Journal 23, no. 2 (2001): 148. http://dx.doi.org/10.1071/rj01002.

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The perception of change or decline in the productivity of temperate pastures in south-eastern Australia is an important concern to livestock producers and pasture scientists. Much of this concern relates to reductions in the proportions of desirable species in the composition of pasture systems as a result of increased soil and weed problems. The purpose of this paper is to investigate trends in the long-term economic productivity of four categories of temperate pastures (all introduced pastures, introduced perennial grasses, introduced legumes and all native pastures) on the central and sout

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Vere, D. T., R. E. Jones, and M. H. Campbell. "The economics of temperate pasture systems on the central and southern Tablelands of New South Wales." Rangeland Journal 23, no. 2 (2001): 159. http://dx.doi.org/10.1071/rj01003.

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Pastures are the basis of most forms of agricultural production on the New South Wales central and southern tablelands. Pastures occupy the bulk of the region's landmass and pasture-based livestock production annually contributes more than three-quarters of the regional gross value of rural production. Throughout the region, there is substantial variation in pasture composition, ranging from high quality introduced perennial grasses and legumes to pastures comprising mainly low quality native species. This paper examines the economics of the main categories of temperate pastures over a range o

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Jones, Roger A. C. "Virus diseases of pasture grasses in Australia: incidences, losses, epidemiology, and management." Crop and Pasture Science 64, no. 3 (2013): 216. http://dx.doi.org/10.1071/cp13134.

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This paper reviews current knowledge for Australia over the occurrence, losses caused, epidemiology, and management of virus diseases of pasture grasses. It also reviews all records of viruses in wild grasses likely to act as alternative host reservoirs for virus spread to nearby pastures or crops. Currently, 21 viruses have been found infecting 36 pasture or forage grass species and 59 wild grass species. These viruses are transmitted by arthropod vectors (mites or insects) or, in one instance, via grass seeds. Their modes of transmission are critical factors determining their incidences with

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McPhee, M. J., J. F. Ayres, and M. L. Curll. "Growth periodicity of introduced pastures on the northern tablelands of New South Wales." Australian Journal of Agricultural Research 48, no. 6 (1997): 831. http://dx.doi.org/10.1071/a96176.

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This paper reports on the growth periodicity of introduced temperate perennial pastures in a summer-rainfall environment in the high-rainfall zone of eastern Australia. Data were derived from an experiment (1985-87) directed at evaluating pasture cultivars when sown in binary mixtures grazed by sheep. The data were also simulated by using the decision support system SheepO (Version 4·0) and validated by visual techniques, deviance measures, and statistical tests. The model simulated pasture growth rate and total biomass with acceptable accuracy. The study provided a quantification of the growt

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King, K. L., and K. J. Hutchinson. "Pasture and grazing land: assessment of sustainability using invertebrate bioindicators." Australian Journal of Experimental Agriculture 47, no. 4 (2007): 392. http://dx.doi.org/10.1071/ea05270.

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Impacts of practices frequently used to manage Australian pastures are reviewed with the aim of determining which groups are responsive to changes in grazing regime, fertiliser use, pasture types, tree clearing, pesticide use, liming and irrigation. Invertebrate groups sensitive to pasture management regimes may be potential candidates for use as bioindicators of ecological sustainability of these pasture types. This review concentrates on the more intensively utilised temperate pastures of southern Australia, as very little work has been done on the impact of the grazing animal and pasture ma

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Fulkerson, WJ, and K. Slack. "Estimating mass of temperate and tropical pastures in the subtropics." Australian Journal of Experimental Agriculture 33, no. 7 (1993): 865. http://dx.doi.org/10.1071/ea9930865.

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The feasibility of estimating, with acceptable precision, temperate and tropical pasture mass in a subtropical environment was evaluated. For the tropical grasses kikuyu (Pennisetum clandestinum) and setaria (Setaria ancepts), 3 different pasture meters were calibrated against 1 of 3 dry matter (DM) estimates. Temperate pastures (predominantly Lolium perenne and Trifolium repens) were evaluated using the Ellinbank rising plate meter (RPMl) calibrated against DM to ground level. A single regression equation was developed for syegrass-white clover pasture from data pooled within season over firs

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Tesis sobre el tema "Temperate pastures"

Thulin, Susanne Maria, and smthulin@telia com. "Hyperspectral Remote Sensing of Temperate Pasture Quality." RMIT University. Mathematical and Geospatial Sciences, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090507.163006.

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This thesis describes the research undertaken for the degree of Doctor of Philosophy, testing the hypothesis that spectrometer data can be used to establish usable relationships for prediction of pasture quality attributes. The research data consisted of reflectance measurements of various temperate pasture types recorded at four different times (years 2000 to 2002), recorded by three hyperspectral sensors, the in situ ASD, the airborne HyMap and the satellite-borne Hyperion. Corresponding ground-based pasture samples were analysed for content of chlorophyll, water, crude protein, digestibi

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Johnston, William Henry, University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "The role of Eragrostis curvula (Schrad.) Nees. complex in temperate pastures in southeastern Australia." THESIS_CSTE_EAG_Johnston_W.xml, 2003. http://handle.uws.edu.au:8081/1959.7/29.

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This thesis examines the hypothesis that, in southern New South Wales and northeast Victoria, Australia, palatable taxa of E. curvula offer advantages that complement those of the species that are traditionally sown in temperate pastures in a landscape context.This hypothesis was based on a review of literature showing that, prior to European settlement, the vegetation, the landscape and the climate were broadly in balance, and the wateruse pattern of the vegetation of southeastern Australia resulted in water being used more-or-less completely by the end of summer. This maximised the capacity

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Johnston, William Henry. "The role of Eragrostis curvula (Schrad.) Nees. complex in temperate pastures in southeastern Australia /." View thesis View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030506.100204/index.html.

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Wallace, Richard Paul, and n/a. "Effects of trees on temperate native pasture productivity." University of Canberra. Applied Science, 1999. http://erl.canberra.edu.au./public/adt-AUC20061113.160245.

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The goal of this work was to quantify the effects of eucalypt woodland blocks on the productivity of native pastures. This research was conducted on the Southern Tablelands of New South Wales. Tree planting or retention is seen by many as an important tool in addressing the problems of soil degradation resulting from clearing and pasture improvement that threaten the sustainability of pasture systems. In particular these are dry land salinity and erosion, both of which affect large areas of agricultural lands in the south east of Australia. Whilst native tree cover remains over substantial por

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Slaughter, Lindsey C. "SOIL MICROBIAL COMMUNITY RESPONSE TO CLIMATE CHANGE: RESULTS FROM A TEMPERATE KENTUCKY PASTURE." UKnowledge, 2012. http://uknowledge.uky.edu/pss_etds/8.

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Climate change is likely to alter plant species composition and interactions between plants and soil microbes that together dictate the quantity and quality of forage produced in pastures, the base of animal production in central Kentucky. This study assessed the seasonal dynamics of soil microbes and their response to increased temperature (+3oC) and growing season precipitation (+30% of the mean annual). Total soil microbial biomass, community composition, enzyme activities, potential carbon mineralization, and catabolic responses to selected substrates were measured seasonally in the differ

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Fletcher, Donald Bryden, and N/A. "Population Dynamics of Eastern Grey Kangaroos in Temperate Grasslands." University of Canberra. Resource, Environmental & Heritage Sciences, 2006. http://erl.canberra.edu.au./public/adt-AUC20070808.152438.

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This thesis is about the dynamics of eastern grey kangaroo (Macropus giganteus) populations and their food supplies in temperate grasslands of south-eastern Australia. It is based on the study of three populations of eastern grey kangaroos inhabiting �warm dry�, �cold dry�, and �warm wet� sites within the Southern Tablelands climatic region. After a pilot survey and methods trial in early 2001, the main period of study was from August 2001 to July 2003. The study populations were found to have the highest densities of any kangaroo populations, 450 to 510 km-2. Their density was the same at the

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Lima, Luís Otávio da Costa de. "Lisina e metionina na dieta de vacas de alta produção mantidas em pastagens de azevém (Lolium multiflorum Lam.) e suplementadas com concentrado de baixo teor proteico." Universidade Federal de Santa Maria, 2017. http://repositorio.ufsm.br/handle/1/11676.

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Current research looked into the effects of supplementing essential amino acids L-lysine and DL-methionine to lactating dairy cows, grazing annual ryegrass and receiving a low protein concentrate meal. Twenty Holstein cows were managed in a 2x2 crossover experimental design, with two treatments and two periods. Cows received the same diet in both treatments, except for the inclusion of 20g lysine and 60g methionine in one treatment. This aimed at supplying 6.92% and 2.34% of the metabolizable protein in lysine and methionine, respectively, as suggested by the Cornell Net Carbohydrate and Prote

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Mills, Annamaria. "Understanding constraints to cocksfoot (Dactylis glomerata L.) based pasture production." Phd thesis, Lincoln University. Agriculture and Life Sciences Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20070717.161658/.

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This research examined the mechanisms by which temperature, water availability and nitrogen (N) affect the dry matter (DM) yield potential of cocksfoot (Dactylis glomerata L.) dominant pastures. The experiment was a split plot design with main plots of fully irrigated (I) or dryland (D), sub-plots of N fertiliser at 800 kg N/ha in 2003/04; and 1600 kg N/ha in 2004/05 (+N) or 0 kg N/ha (-N). The potential environmental yield of an established 8 year old cocksfoot dominant pasture was 21.9 t DM/ha/y from I+N pastures compared with 9.8 t DM/ha by I-N pastures and 15.1 t DM/ha/y by D+N pastures.

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Khan, Shabana. "Factors affecting nitric oxide and nitrous oxide emissions from grazed pasture urine patches under New Zealand conditions." Lincoln University, 2009. http://hdl.handle.net/10182/1570.

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New Zealand is dominated by its agricultural industry with one of the most intensive farming practices being that of intensive dairying. New Zealand currently has approximately 5.3 million dairy cows that excrete up to 2.2 L of urine, per urination event, up to 12 times per day. This equates to 5.1 x10¹⁰ L per year or enough urine to fill over 1.2 million milk tankers. This sheer volume of urine and its associated N content has implications for the cycling of N within the pasture soils utilised, and New Zealand’s greenhouse gas budget due to the emission of N₂O from urine affected areas. The e

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Kabine, Ezekiel Simon. "Evaluation of different temperature winter fodder species (Festulolium hybrids, dactylis species, lolium hybrids) and grass-legume mixtures in the warmer summer rainfall areas of South Africa." Thesis, University of Limpopo, 2016. http://hdl.handle.net/10386/1808.

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Thesis (MSc. (Pasture Science)) -- University of Limpopo, 2016<br>South Africa is regarded as a semi-arid area; only 28% of the country receives more than 600 mm rainfall recorded annually. Sustainable utilization of cool season fodder grasses in summer rainfall areas to produce winter animal feed remains a major problem. Farmers are affected by a shortage of adequate, good quality herbage for livestock during winter and dry periods on commercial farms. The study aimed to evaluate and compare the production potential of six Festulolium hybrids, three Dactylis species, and five Lolium hybrids

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Libros sobre el tema "Temperate pastures"

Peeters, Alain. Temperate grasses: Description, ecology and agronomic properties. Oxford: Blackwell Science, 2003.

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J, Rook A., Penning P. D, and British Grassland Society, eds. Grazing management: The principles and practice of grazing, for profit and environmental gain, within temperate grassland systems ; poceedings of the British Grassland Society conference held at the Cairn Hotel, Harrogate, 29 February-2 March 2000. [Reading?]: British Grassland Society, 2000.

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International Workshop on Genetic Resources of Cool-season Pasture, Forage, and Food Legumes for Semi-arid Temperate Environments (1987 Aleppo, Syria). Legume genetic resources for semi-arid temperate environments: Proceedings of an International Workshop on Genetic Resources of Cool-season Pasture, Forage, and Food Legumes for Semi-Arid Temperate Environments, Cairo, Egypt, 19-2r June 1987. Edited by Smith Alan, Robertson Larry, United Nations Development Programme, and International Center for Agricultural Research in the Dry Areas. Aleppo, Syria: International Center for Agricultural Research in Dry Areas, 1991.

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International Workshop on Genetic Resources of Cool-season Pasture, Forage, and Food Legumes for Semi-arid Temperate Environments (1987 Cairo, Egypt). Legume genetic resources for semi-arid temperate environments: Proceedings of an International Workshop on Genetic Resources of Cool-season Pasture, Forage, and Food Legumes for Semi-arid Temperate Environments, Cairo, Egypt, 19-24 June 1987. Edited by Smith Alan, Robertson L. D, United Nations Development Programme, and International Center for Agricultural Research in the Dry Areas. Aleppo, Syria: ICARDA, 1991.

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(Contributor), Cecile Vanbellinghen, and John Frame (Contributor), eds. Wild And Sown Grasses: Profiles of a Temperate Species : Ecology, Biodiversity and Use. Food & Agriculture Organization of the UN (FA, 2004.

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David, Chapman, Rosemary Collins, Athole Marshall, Olivier Huguenin-Elie, and Agustin Del Prado. Improving Grassland and Pasture Management in Temperate Agriculture. Burleigh Dodds Science Publishing Limited, 2018.

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Collins, Rosemary, and Athole Marshall. Improving Grassland and Pasture Management in Temperate Agriculture. Burleigh Dodds Science Publishing Limited, 2019.

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Collins, Rosemary, and Athole Marshall. Improving Grassland and Pasture Management in Temperate Agriculture. Burleigh Dodds Science Publishing Limited, 2019.

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Wheeler, J. L. Temperate Pastures: Their Production, Use and Management (Australian Wool Corporation Technical Publication). CSIRO Publishing, 1987.

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Marshall, Athole. Improving grassland and pasture management in temperate agriculture. Burleigh Dodds Science Publishing, 2018. http://dx.doi.org/10.1201/9781351114561.

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Capítulos de libros sobre el tema "Temperate pastures"

Reed, K. F. M., M. J. Mathison, and E. J. Crawford. "The Adaptation, Regeneration, and Persistence of Annual Legumes in Temperate Pasture." In Persistence of Forage Legumes, 69–89. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1989.persistenceofforagelegumes.c6.

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Spangenberg, German, Michael Emmerling, Ulrik John, Roger Kalla, Angela Lidgett, Eng K. Ong, Tim Sawbridge, and Tracie Webster. "Transgenesis and Genomics in Molecular Breeding of Temperate Pasture Grasses and Legumes." In Plant Biotechnology 2002 and Beyond, 497–502. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2679-5_103.

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Mabhuye, Edmund B., and Pius Z. Yanda. "Locally based responses to impacts of climate change in pastoral landscapes of Northern Tanzania." In Climate change impacts and sustainability: ecosystems of Tanzania, 101–21. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789242966.0101.

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Abstract The impacts of climate change and variability have manifested themselves throughout the world, but considerable temporal and spatial variations exist across various places and countries. Given the variation in vulnerability, this study was undertaken in pastoral landscapes in northern Tanzania to assess the impacts of climate change, adaptation strategies and their implications to communities' livelihoods and ecosystem integrity. It examined: (i) climate trends and associated impacts on communities' livelihood options; (ii) climate change coping and adaptation strategies adopted by selected communities to reduce the severity of climate change impacts; and (iii) the challenges associated with climate change adaptation strategies in the pastoral landscape. Primary data were collected using household surveys, interviews with key informants, focus group discussions, direct field observation using transect walks and institutional analysis. Secondary data were obtained through documentary review and theme-content analysis. Results indicate that there are slight increases in temperature and wind speed as well as decreasing trends and erratic patterns of rainfall which cause drought and extended dry spells. Fluctuation in temperature and rainfall patterns affects livestock keeping through recurrent drought that has negative implications on pasture and water availability. Communities are responding to the changes through traditional response mechanisms and have embraced a few new adaptation strategies against these climate extremes, particularly drought. Generally, strategies for adaptation are likely to be successful in the near future, subject to review and harmonization of policies, institutional and legal frameworks to harness existing opportunities for management of natural resources for sustainable development and build the long-term balance between ecosystem integrity and human needs.

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Beinart, William, and Lotte Hughes. "Sheep, Pastures, and Demography in Australia." In Environment and Empire. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780199260317.003.0011.

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Succeeding phases of British economic growth prompted strikingly different imperatives for expansion, for natural resource exploitation, and for the social organization of extra-European production. In the eighteenth century, sugar, African slaves, and shipping in the Atlantic world provided one major dynamic of empire. But in the nineteenth century, antipodean settlement and trade, especially that resulting from expanding settler pastoral frontiers, was responsible for some of the most dramatic social and environmental transformations. Plantations occupied relatively little space in the new social geography of world production. By contrast, commercial pastoralism, which took root most energetically in the temperate and semi-arid regions of the newly conquered world, was land-hungry but relatively light in its demands for labour. The Spanish Empire based in Mexico can be considered a forerunner. By the 1580s, within fifty years of their introduction, there were an estimated 4.5 million merino sheep in the Mexican highlands. The livestock economy, incorporating cattle as well as sheep, spread northwards through Mexico to what became California by the eighteenth century. Settler intrusions followed in the vast landmasses of southern Latin America, southern Africa, Australia, and New Zealand. Australia was one of the last-invaded of these territories, and, in respect of the issues that we are exploring, was in some senses distinctive. Unlike Canada and South Africa, there was no long, slow period of trade and interaction with the indigenous population; like the Caribbean, the Aboriginal people were quickly displaced by disease and conquest. The relative scale of the pastoral economy was greater than in any other British colony. Supply of meat and dairy products to rapidly growing ports and urban centres was one priority for livestock farmers. Cattle ranching remained a major feature of livestock production in Australia. Bullock-carts, not dissimilar to South African ox-wagons, were essential for Australian transport up to the 1870s. But for well over a century, from the 1820s to the 1950s and beyond, sheep flooded the southern lands. Although mutton became a significant export from New Zealand and South America, wool was probably the major product of these pastoral hinterlands—and a key focus of production in Australia and South Africa. The growth in antipodean sheep numbers was staggering.

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W. Alison, Montgomery, William D. Pitman, Glen E. Aiken, and Kun-Jun Han. "Potential for Use of a Perennial C3 Grass in a Warm-Temperate Region with Pastures Dominated by C4 Grasses." In Grasses as Food and Feed. IntechOpen, 2018. http://dx.doi.org/10.5772/intechopen.79231.

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Casler, Michael D., and Daniel J. Undersander. "Identification of Temperate Pasture Grasses and Legumes." In Horse Pasture Management, 11–35. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-812919-7.00002-0.

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"Biological weed control in temperate grasslands." In Improving grassland and pasture management in temperate agriculture, 303–44. Burleigh Dodds Science Publishing, 2019. http://dx.doi.org/10.1201/9781351114561-15.

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Bourdôt, Graeme W., and Michael G. Cripps. "Biological weed control in temperate grasslands." In Improving grassland and pasture management in temperate agriculture, 283–324. Burleigh Dodds Science Publishing, 2018. http://dx.doi.org/10.19103/as.2017.0024.14.

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"Balancing pasture productivity with environmental and animal health requirements." In Improving grassland and pasture management in temperate agriculture, 257–72. Burleigh Dodds Science Publishing, 2019. http://dx.doi.org/10.1201/9781351114561-12.

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"Planning and sowing grasslands Shannon Williams and Sarah Baker, University of Idaho, USA." In Improving grassland and pasture management in temperate agriculture, 145–90. Burleigh Dodds Science Publishing, 2019. http://dx.doi.org/10.1201/9781351114561-8.

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Actas de conferencias sobre el tema "Temperate pastures"

"Impacts of a two degree increase in temperature on pasture growth in the Northern Tablelands of New South Wales." In 19th International Congress on Modelling and Simulation. Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2011. http://dx.doi.org/10.36334/modsim.2011.b1.powell.

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Informes sobre el tema "Temperate pastures"

Leis, Sherry, and Lloyd Morrison. Plant community trends at Tallgrass Prairie National Preserve: 1998–2018. National Park Service, October 2022. http://dx.doi.org/10.36967/2294512.

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The Heartland Inventory and Monitoring Network monitors plant communities at Tallgrass Prairie National Preserve and evaluates a variety of environmental variables that aﬀect vegetation patterns, including climate and ecological disturbances such as ﬁre and grazing. Here we report on 2002–2018 trends in management actions (ﬁre and grazing) and key plant community indicators. Temperature has increased over the past 50 years in the region. Precipitation and a standardized precipitation-evapotranspiration index included a high degree of interannual variability and did not demonstrate directional

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Schwarte, Kirk A., and James R. Russell. Microclimate Effects on the Temperature/Spatial Distribution of Beef Cows Grazing Cool-Season Grass Pastures by Different Management Practices (A Progress Report). Ames (Iowa): Iowa State University, January 2009. http://dx.doi.org/10.31274/ans_air-180814-612.

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Brosh, Arieh, David Robertshaw, Yoav Aharoni, Zvi Holzer, Mario Gutman, and Amichai Arieli. Estimation of Energy Expenditure of Free Living and Growing Domesticated Ruminants by Heart Rate Measurement. United States Department of Agriculture, April 2002. http://dx.doi.org/10.32747/2002.7580685.bard.

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Research objectives were: 1) To study the effect of diet energy density, level of exercise, thermal conditions and reproductive state on cardiovascular function as it relates to oxygen (O2) mobilization. 2) To validate the use of heart rate (HR) to predict energy expenditure (EE) of ruminants, by measuring and calculating the energy balance components at different productive and reproductive states. 3) To validate the use of HR to identify changes in the metabolizable energy (ME) and ME intake (MEI) of grazing ruminants. Background: The development of an effective method for the measurement of

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