Baldwin, R. L., J. France, D. E. Beever, M. Gill and J. H. M. Thornley. 1987. Metabolism of the lactating cow. III. Properties of mechanistic models suitable for evaluation of energetic relationships and factors involved in the partition of nutrients. J. Dairy Res. 54:133-145.
Beck-Friis, B., U. Sonesson, M. Pell, H. Jonsson and H. Kirchmann. 2000. Formation and emission of $N_2O$
from small and large compost heaps of organic household waste. Environ. Monitor. Assess. 62:317-331.
Benchaar, C., J. Rivest, C. Pomar and J. Chiquette. 1998. Prediction of methane production from dairy cows using existing mechanistic models and regression equations. J. Anim. Sci. 76: 671-672.
Beswick, K. M., T. W. Simpson, D. Fowler, T. W. Choularton, M. W. Gallagher, K. J. Hargreaves, M. A. Sutton and A. Kaye. 1998. Methane emissions on large scales. Atmos. Environ. 32 (19):3283-3291.
Beuvink, J. M. W., S. F. Spoelstra and R. J. Hogendorp. 1992. An automated method for measuring time-course of gas production of feedstuff incubated with buffered rumen fluid. Neth. J. Agric. Sci. 40:401-407.
Bhatta, R., K. Tajima and M. Kurihara. 2006a. Influence of temperature and pH on fermentation pattern and methane production in the rumen simulating fermenter (RUSITEC). Asian-Aust. J. Anim. Sci. 19(3):376-380.
Bhatta, R., K. Tajima, N. Takusari, K. Higuchi, O. Enishi and M. Kurihara. 2006b. Comparison of sulfur hexafluoride tracer technique, rumen simulation technique and in vitro gas production techniques for methane production from ruminant feeds. International Congress Series (Elsevier) 1293C: 58-61.
Bhatta, R., O. Enishi, N. Takusari, K. Higuchi, I. Nonaka and M. Kurihara. 2007. Diet effects on methane production by goats and a comparison between measurement methodologies. J. Agric. Sci. Cambridge (in press).
Blake, D. R. and F. S. Rowland. 1988. Continuing worldwide increase in tropospheric methane, 1978 to 1987. Sci. 239:1129-1131.
Blaxter, K. L. and J. L. Clapperton. 1965. Prediction of the amount of methane produced by ruminants. Br. J. Nutr. 19:511.
Blaxter, K. L. 1962. The Energy Metabolism of Ruminants. London, Hutchinson.
Blummel, M. and E. R. Orskov. 1993. Comparison of gas production and nylon bag degradability of roughages in predicting feed intake in cattle. Anim. Feed Sci. Technol. 40:109-119.
Blummel, M., D. I. Givens and A. R. Moss. 2005. Comparison of methane produced by straw fed sheep in open-circuit respiration with methane predicted by fermentation characteristics measured by an in vitro gas procedure Anim. Feed Sci. Technol. 123-124:379-390.
Blummel, M., H. Steingass, K. Becker and M. Koppenhagen. 1993. Production of SCFA, $CO_2$, CH_4$ and microbial cells in vitro. Proc. Soc. Nutr. Physiol. 1, 9.
Boadi, D. A., K. M. Wittenberg and A. D. Kennedy. 2002. Validation of the sulphur hexafluoride ($SF_6$
) tracer gas technique for measurement of methane and carbon dioxide production by cattle. Can. J. Anim. Sci. 82:125-131.
Boadi, D., C. Benchaar, J. Chiquette and D. Masse. 2004. Mitigation strategies to reduce enteric methane emissions from dairy cows: update review. Can. J. Anim. Sci. 84:319-335.
Cone, J. W., A. H. Gelder, G. J. W. Visscher and L. Oudshoorn. 1996. Influence of rumen fluid and substrate concentration on fermentation kinetics measured with fully automated time related gas production apparatus. Anim. Feed Sci. Technol. 61:113-128.
Crill, P. M., J. H. Butler, D. J. Cooper and P. C. Novelli. 1995. Standard analytical methods for measuring trace gases in the environment. In: (Ed. P. A. Matson and R. C. Harriss): Biogenic trace gases: Measuring emissions from soil and water. Methods in ecology series. Oxford, Blackwell Sci. pp. 164-205.
Czerkawski, J. W. and G. Breckenridge. 1977. Design and development of a long-term rumen simulation technique (Rusitec). Br. J. Nutr. 38:371-383.
Czerkawski, J. W. and G. Breckenridge. 1969. The fermentation of sugar-beet pulp and sucrose in an artificial rumen, and the effect of linseed oil fatty acids on the fermentation. Br. J. Nutr. 23:51-66.
Czerkawski, J. W. and G. Breckenridge. 1970. Small scale apparatus for studying rumen fermentation. Lab Practice 19:717-728.
Denmead, O. T., R. Leuning, I. Jamie and D. W. T. Griffith. 2000. Nitrous oxide emissions from grazed pastures: measurements at different scales. Chemosphere: Global Change Sci. 2:302-312.
Denmead, O. T., L. A. Harper, J. R. Freney, D. W. T. Griffith, R. Leuning and R. R. Sharpe. 1998. A mass balance method for non-intrusive measurements of surface-air trace gas exchange. Atmos. Environ. 32:3679-3688.
Devies, D. R., M. K. Theodorou, J. Baughan, A. E. Brooks and J. R. Newbold. 1995. An automated pressure evaluation system (APES) for determining the fermentation characteristics of ruminant feeds. Ann. Zootech. 44:36.
Edwards, G. C., H. H. Neumann, G. den Hartog, G. W. Thurtell and G. Kidd. 1994. Eddy correlation measurements of methane fluxes using a tunable diode laser at the Kinosheo Lake tower site during the Northern Wetlands Study (NOWES). J. Geophy. Res. 99:1511-1517.
El-Shazly, K and R. E. Hungate. 1965. Fermentation capacity as a measure of net growth of rumen microorganisms. Appl. Microbiol. 13:62-69.
Eun, J. S., V. Fellner and M. L. Gumpertz. 2004. Methane production by mixed ruminal cultures incubated in dual-flow fermenters. J. Dairy Sci. 87:112-121.
France, J., D. E. Beever and R. C. Siddons. 1993. Compartmental schemes for estimating methanogenesis in ruminants from isotope dilution data. J. Theor. Biol. 164:207-218.
Freibauer, A. 2000. New approach to an inventory of $N_2O$ and $CH_4$ emissions from agriculture in Western Europe. In: (Ed. J. van Ham, A. P. M. Baede, L. A. Meyer and R. Ybema): Non-$CO_2$ Greenhouse Gases: Scientific Understanding, Control and Implementation. Kluwer Academic Publishers, Dordrecht - Boston - London, pp. 147-148.
Getachew, G., M. Blummel, H. P. S. Makkar and K. Becker. 1998. In vitro gas measuring techniques for assessment of nutritional quality of feeds: a review. Anim. Feed Sci. Technol. 72:261-281.
Getachew, G., P. H. Robinson, E. J. DePeters, S. J. Taylor, D. D. Gisi, G. E. Higginbotham and T. J. Riordan. 2005. Methane production from commercial dairy rations estimated using an in vitro gas technique. Anim. Feed Sci. Technol. 123-124:391-402.
Gimson, N. R., K. R. Lassey, G. W. Brailsford, A. M. Bromley and M. Uliasz. 2002. The determination of agricultural methane emission fluxes based on air sampling and advanced modelling techniques. In: (Ed. J. Van Ham, A. P. M. Baede, R. Guicherit and J. G. M. Williams-Jacobse). Non-$CO_2$ greenhouse gases: scientific understanding, control options and policy aspects, pp. 559-564. Millpress, Rotterdam.
Greatorex, J. M. 2000. A review of methods for measuring methane, nitrous oxide and oudour emissions from animal production activities. JTI- Institutetet for jordbruks-och miljoteknik, Uppsala, Sweden. p. 19.
Griffith, D. W. T., R. Leuning, O. T. Denmead and I. M. Jaomie. 2002. Air-land exchanges of $CO_2$
measured by FTIR spectrometry and micrometeorological techniques. Atmos. Environ. 36:1833-1842.
Harper, L. A., O. T. Denmead, J. R. Freney and F. M. Byers. 1999. Direct measurement of methane emission from grazing and feedlot cattle. J. Anim. Sci. 77:1392-1401.
Hegarty, R. S., A. Machmueller and G. C. Waghorn. 2004. Can tracers other than $SF_6$ be used to measure enteric methane emissions from individual animals. Clarkson, T. S. (comp.) Proceedings of the workshop on the Science of Atmospheric Trace gases, 2004. NIWA Technical Report 125. p. 139.
Howden, S. M. and P. J. Reyenga. 1999. Methane emissions from Australian livestock: implications of the Kyoto Protocol. Aust. J. Agric. Res. 50:1285-1291.
Hungate, R. E., D. W. Fletcher, R. W. Dougherty and B. F. Barrennentine. 1955. Microbial activity in the bovine rumen: its measurement and relation to bloat. Appl. Microbiol. 3:161-173.
IPCC. 1990. Climate Change: The IPCC Impact Assessment. Canberra, Australia: Australian Government Publishing Service.
IPCC. 1992. Climate Change 1992. The Supplementary Report to the Scientific Assessment (Ed. J. T. Houghton, B. A. Callander and S. K. Varney). Cambridge: Cambridge University Press.
IPCC. 2001. Climate Change 2001. The Scientific Basis. Contribution of working group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge Press.
Johnson, D. E., K. A. Johnson, G. M. Ward and M. E. Branine. 2000. Ruminants and other animals. In: Atmospheric Methane: Its role in the global environment, (Ed. M. A. K. Khalil), Springer-Verlag, Berlin Heidelberg, pp. 112-133.
Johnson, K. A. and D. E. Johnson. 1995. Methane emissions from cattle. J. Anim. Sci. 73:2483-2492.
Johnson, K. A., H. H. Westberg, B. K. Lamb and R. L. Kincaid. 2001. The use of sulphur hexafluoride for measuring methane emissions from farm animals. In Proc. 1st international conference on greenhouse gases and animal agriculture, Obihiro, Hokkaido, Japan, pp. 72-81.
Johnson, K. A., M. T. Huyler, H. H. Westberg, B. K. Lamb and P. Zimmerman. 1994. Measurement of methane emissions from ruminant livestock using a $SF_6$
tracer technique. Environ. Sci. Technol. 28:359-362.
Judd, M. J, F. M. Kelliher, M. J. Ulyatt, K. R. Lassey, K. R. Tate, I. D. Shelton, M. J. Harvey and C. F. Walker. 1999. Net methane emissions from grazing sheep. Global Change Biol. 5:647-657.
Kaharabata, S. K. and P. H. Schuepp. 2000. Estimating methane emissions from dairy cattle housed in a barn and feedlot using atmospheric tracer. Environ. Sci. Technol. 34:3296-3302.
Kajikawa, H., H. Jin, F. Terada and T. Suga. 2003. Operation and characteristics of newly improved and marketable artificial rumen (Rusitec), Mem. Natl. Inst. Livest. Grassl. Sci. Japan, N0. 2.
Kawashima, T. 2001. Measurement of methane production from ruminants by ventilated flow-through method with a face mask. Tsukuba workshop on 'Development of new monitoring method for methane emission from ruminants', NILGS, Japan pp. 16-19.
Lassey, K. R., M. J. Ulyatt, R. J. Martin, C. F. Walker and I. D. Shelton. 1997. Methane emissions measured directly from grazing livestock in New Zealand. Atmos. Environ. 31:2905-2914.
Lassey, K., D. Lowe and M. Manning. 2000. The trend in atmospheric methane and dgr; 13C and implications for isotopic constraints on the global methane budget. Global Biogeochemical Cycles 14:0886-6236.
Leuning, R., S. K. Baker, I. M. Jamie, C. H. Hsu, L. Klein, O. T. Denmead and D. W. T. Griffith. 1999. Methane emissions from free-ranging sheep: A comparison of two measurement methods. Atmos. Environ. 33:1357-1365.
Liang, J. B., F. Terada and I. Hamaguchi. 1989. Efficacy of using the face mask technique for the estimation of daily heat production of cattle. In: (Ed. Y. Van Der Honing and W. H. Close). Energy Metabolism of farm Animals. Pudoc, Wageningen, the Netherlands.
Lockyer, D. R. and S. C. Jarvis. 1995. The measurement of methane losses from grazing animals. Environ. Pollut. 90:383-390.
Lockyer, D. R. 1997. Methane emissions from grazing sheep and calves. Agricult. Ecosys. Environ. 66:11-18.
Machmuller, A. and R. S. Hegarty. 2005. Alternative tracer gases for the ERUCT technique to estimate methane emission from grazing animals. 2nd International Conference on Greenhouse Gases and Animal Agriculture, Zurich. Pp. 365-368.
Makkar, H. P. S., M. Blummel and K. Becker. 1995. Formation of complexes between polyvinyl pyrrolidones or polyethylene glycols and tannins, and their implication in gas production and true digestibility in in vitro techniques. Br. J. Nutr. 73:897-913.
Mbanzamihigo, L., V. Fievez, C. da Costa Gomez, F. Piattoni, L. Carlier and D. Demeyer. 2002. Methane emissions from the rumen of sheep fed a mixed grass-clover pasture at two fertilisation rates in early and late season Can. J. Anim. Sci. 82:69-77.
McBee, R. H. 1953. Manometric method for the evaluation of microbial activity of rumen with application to utilization of cellulose and hemicellulose. Appl. Microbiol. 1:106-110.
McCourt, A., T. Yan, C. S. Mayne and M. G. Porter. 2005. Prediction of methane output in beef cattle from indirect respiration calorimetry data. 2nd International Conference on Greenhouse Gases and Animal Agriculture, Zurich. pp. 405- 408.
McLean, J. A. and G. Tobin. 1987. Animal and human calorimetry. Cambridge university press. New York.
McLean, J. A. 1972. On the calculation of heat production from open-circuit calorimetric measurements. Br. J. Nutr. 27:597-600.
Menke, K. H. and H. Steingass. 1988. Estimation of the energetic feed value obtained from chemical analysis and gas production using rumen fluid. Anim. Res. Dev. 28:7-55.
Menke, K. H., L. Raab, A. Salewski, H. Steingass, D. Fritz and W. Schneider. 1979. The estimation of the digestibility and metabolizable energy content of ruminant feedingstuffs from the gas production when they are incubated with rumen liquor. J. Agric. Sci. 93:217-222.
Mills, J. A. N., J. Dijkstra, A. Bannick, S. B. Camel, E. Krebreab and J. France. 2001. A mechanistic model of whole-tract digestion and methanogenesis in the lactating dairy cow: model development, evaluation and application. J. Anim. Sci. 79:1584-1597.
Moate, C. P., J. L. Dunn, C. A. Bates and Y. M. Liu. 1997. An analytical model for the H X (h+g) Jahn-Teller system. J. Phys. Condens. Matter. 9:6049-6060.
Moe, P. W. and H. F. Tyrell. 1979. Methane production by dairy cows. J. Dairy Sci. 62:1583-1586.
Murray, P. J., A. Moss, D. R. Lockyer and S. C. Jarvis. 1999. A comparison of system for measuring methane emissions from sheep. J. Agric. Sci. Cambridge. 133:439-444.
Murray, R. M., A. M. Bryant and R. A. Leng. 1975. Measurement of methane production in sheep. In: Tracer studies on nonprotein nitrogen for ruminants II. International Atomic Energy Agency. Vienna.
Pelchen, A. and K. J. Peters. 1998. Methane emissions from sheep. Small Rumin. Res. 27:137-150.
Pell, A. N. and P. Schofield. 1993. Computerised monitoring of gas production to measure forage digestion. J. Dairy Sci. 76:1063-1073.
Pinares-Pantino, C. S., M. J. Ulyatt, K. R. Lassey, T. N. Barry, C. W. Holmes and D. E. Johnson. 2003a. Methane emission by alpaca and sheep fed on lucerne hay or grazed on pastures of perennial ryegrass/white clover or birdsfoot trefoil. J. Agric. Sci. Cambridge. 140:215-226.
Pinares-Patino, C. S., M. J. Ulyatt, K. R. Lassey, T. N. Barry and C. W. Holmes. 2003. Persistence of differences between sheep in methane emission under generous grazing conditions. J. Agric. Sci. Cambridge. 140:227-233.
Pinares-Patino, C. 2000. Rumen function and digestion parameters associated with differences between sheep in methane emissions when fed chaffed lucerne hay. J. Agric. Sci. Cambridge. 140:205-214.
Sitaula, B. K., J. Luo and L. R. Bakken. 1992. Rapid analysis of climate gases by wide bore capillary gas chromatography. J. Environ. Quality. 21:493-496.
Shibata, M., F. Terada, K. Iwasaki, M. Kurihara and T. Nishida. 1992. Methane production in heifers, sheep and goats consuming diets of various hay-concentrate ratio. Anim. Sci. Technol. (Jpn). 63:1221-1227.
Shibata, M., F. Terada, M. Kurihara, T. Nishida and K. Iwasaki. 1993. Estimation of methane production in ruminants. Anim. Sci. Technol. (Jpn). 64:790-796.
Takenaka, A., K. Tajima, M. Mitsumori, H. Kajikawa, T. Osada and M. Kurihara. 2004 The measurement of hydrogen and methane gas using a semiconductor chip sensor. Clarkson, T. S. (comp.) Proceedings of the workshop on the Science of Atmospheric Trace gases, 2004. NIWA Technical Report 125. p. 139.
Terada, F. 1999. Methane emission from ruminant animals. In: Studies on the evaluation of estimation of anthropogenic sources and sinks of greenhouse gases. Final report of global environment research fund, Environment Agency. 157-162 (Jpn).
Theodorou, M. K., B. A. Williams, M. S. Dhanoa, A. B. McAllan and J. France. 1994. A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds. Anim. Feed Sci. Technol. 48:185-197.
Tilley, J. M. A. and R. A. Terry. 1963. A two stage technique for the digestion of forage crops. J. Br. Grassl. Soc. 18:104-111.
Ulyatt, M. J., S. K. Baker, G. J. McCrabb and K. R. Lassey. 1999. Accuracy of SF6 tracer technology and alternatives for field measurements. Aust. J. Agric. Res. 50:1329-1334.
Waghorn, G. C. and K. J. Stafford. 1993. Gas production and nitrogen digestion by rumen microbes from deer and sheep. NZ. J. Agric. Res. 36:493-497.
Wilkerson, V. A., D. P. Casper and D. R. Mertens. 1995. The prediction of methane production of Holstein cows by several equations. J. Dairy Sci. 78:2402-2414.
Wilkins, J. R. 1974. Pressure transducer method for measuring gas production by micro organisms. Appl. Microbiol. 27:135-140.
Wratt, D. S., N. R. Gimson, G. W. Brailsford, A. M. Bromley, K. R. Lassey and M. J. Bell. 2001. Estimating regional methane emissions from agriculture using aircraft measurements of concentration profiles. Atmos. Environ. 35:497-508.
Yan, T., R. E. Agnew, F. J. Gordon and M. G. Porter. 2000. The prediction of methane energy output in dairy and beef cattle offered grass silage-based diets. Livest. Prod. Sci. 64:253-263.