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Volumn 99, Issue 1-3, 2003, Pages 97-111

Nitrous oxide fluxes from maize fields: Relationship to yield, site-specific fertilization, and soil conditions

Author keywords

N fertilization; N2O; Precision farming; Site specific fertilization; Soil moisture; Soil nitrate

Indexed keywords

CROP YIELD; DENITRIFICATION; FERTILIZER APPLICATION; MAIZE; NITROUS OXIDE; SOIL NITROGEN;

EID: 0141498622     PISSN: 01678809     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0167-8809(03)00139-7     Document Type: Article
Times cited : (183)

References (58)
  • 1
    • 0035118062 scopus 로고    scopus 로고
    • Precision farming - The environmental challenge
    • Auernhammer, H., 2001. Precision farming - the environmental challenge. Comput. Electr. Agric. 30, 31-43.
    • (2001) Comput. Electr. Agric. , vol.30 , pp. 31-43
    • Auernhammer, H.1
  • 2
    • 0021368478 scopus 로고
    • Gaseous nitrogen losses from soils under zero-till as compared with conventional-till management systems
    • Aulakh, M.S., Rennie, D.A., Paul, E.A., 1984. Gaseous nitrogen losses from soils under zero-till as compared with conventional-till management systems. J. Environ. Qual. 13, 130-136.
    • (1984) J. Environ. Qual. , vol.13 , pp. 130-136
    • Aulakh, M.S.1    Rennie, D.A.2    Paul, E.A.3
  • 3
    • 0033893148 scopus 로고    scopus 로고
    • Nitrous oxide emission from soils after incorporating crop residues
    • Baggs, E.M., Rees, R.M., Smith, K.A., Vinten, A.J.A., 2000. Nitrous oxide emission from soils after incorporating crop residues. Soil Use Manage. 16, 82-87.
    • (2000) Soil Use Manage. , vol.16 , pp. 82-87
    • Baggs, E.M.1    Rees, R.M.2    Smith, K.A.3    Vinten, A.J.A.4
  • 4
    • 0032728131 scopus 로고    scopus 로고
    • 4 fluxes in relation to tillage, compaction and soil quality in Scotland
    • 4 fluxes in relation to tillage, compaction and soil quality in Scotland. Soil Till. Res. 53, 29-39.
    • (1999) Soil Till. Res. , vol.53 , pp. 29-39
    • Ball, B.C.1    Scott, A.2    Parker, J.P.3
  • 5
    • 0031401260 scopus 로고    scopus 로고
    • Sources of nitrous oxide in soils
    • Bremner, J.M., 1997. Sources of nitrous oxide in soils. Nutr. Cycl. Agroecosyst. 49, 7-16.
    • (1997) Nutr. Cycl. Agroecosyst. , vol.49 , pp. 7-16
    • Bremner, J.M.1
  • 6
    • 0023440240 scopus 로고
    • Nitrous oxide production throughout the year from fertilized and manured maize fields
    • Cates Jr., R.L., Keeney, D.R., 1987. Nitrous oxide production throughout the year from fertilized and manured maize fields. J. Environ. Qual. 16, 443-447.
    • (1987) J. Environ. Qual. , vol.16 , pp. 443-447
    • Cates R.L., Jr.1    Keeney, D.R.2
  • 8
    • 0028599360 scopus 로고
    • Measurement of nitrous oxide emissions from fertilised grassland using closed chambers
    • Clayton, H., Arah, J.R.M., Smith, K.A., 1994. Measurement of nitrous oxide emissions from fertilised grassland using closed chambers. J. Geophys. Res. 99, 16599-16607.
    • (1994) J. Geophys. Res. , vol.99 , pp. 16599-16607
    • Clayton, H.1    Arah, J.R.M.2    Smith, K.A.3
  • 9
    • 0030807265 scopus 로고    scopus 로고
    • Nitrous oxide emissions from fertilised grassland: A 2-year study of the effects of N fertiliser form and environmental conditions
    • Clayton, H., McTaggert, I.P., Parker, J., Swan, L., Smith, K.A., 1997. Nitrous oxide emissions from fertilised grassland: a 2-year study of the effects of N fertiliser form and environmental conditions. Biol. Fert. Soils 25, 252-260.
    • (1997) Biol. Fert. Soils , vol.25 , pp. 252-260
    • Clayton, H.1    McTaggert, I.P.2    Parker, J.3    Swan, L.4    Smith, K.A.5
  • 10
    • 0034113646 scopus 로고    scopus 로고
    • 2O emissions from agricultural land through related soil parameters
    • 2O emissions from agricultural land through related soil parameters. Glob. Change Biol. 6, 417-426.
    • (2000) Glob. Change Biol. , vol.6 , pp. 417-426
    • Conen, F.1    Dobbie, K.E.2    Smith, K.A.3
  • 11
    • 0030498798 scopus 로고    scopus 로고
    • Landscape and seasonal patterns of nitrous oxide emissions in a semiarid region
    • Corre, M.D., van Kessel, C., Pennock, D.J., 1996. Landscape and seasonal patterns of nitrous oxide emissions in a semiarid region. Soil Sci. Soc. Am. J. 60, 1806-1815.
    • (1996) Soil Sci. Soc. Am. J. , vol.60 , pp. 1806-1815
    • Corre, M.D.1    Van Kessel, C.2    Pennock, D.J.3
  • 12
    • 0002812235 scopus 로고
    • Atmospheric chemical processes of the oxides of nitrogen, including nitrous oxide
    • Delwiche, C.C. (Ed.), Wiley, New York
    • 2O. Wiley, New York, pp. 17-44.
    • (1981) 2O , pp. 17-44
    • Crutzen, P.J.1
  • 13
    • 0002603061 scopus 로고
    • Fluxes of nitrous oxide and nitric oxide from terrestrial ecosystems
    • Rogers, J.E., Whitman, W.B. (Eds.), American Society of Microbiology, Washington, DC
    • Davidson, E.A., 1991. Fluxes of nitrous oxide and nitric oxide from terrestrial ecosystems. In: Rogers, J.E., Whitman, W.B. (Eds.), Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrogen Oxides and Halomethanes. American Society of Microbiology, Washington, DC, pp. 219-235.
    • (1991) Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrogen Oxides and Halomethanes , pp. 219-235
    • Davidson, E.A.1
  • 14
    • 0011161880 scopus 로고    scopus 로고
    • Aspects of soil fertility in the interpretation of yield maps as an aid to precision farming
    • Stafford, J.V. (Ed.), Bios Scientific Publishers, Warwick
    • Dawson, C.J., Johnston, A.E., 1997. Aspects of soil fertility in the interpretation of yield maps as an aid to precision farming. In: Stafford, J.V. (Ed.), Precision Agriculture'97. Bios Scientific Publishers, Warwick, pp. 87-94.
    • (1997) Precision Agriculture'97 , pp. 87-94
    • Dawson, C.J.1    Johnston, A.E.2
  • 15
    • 0028163493 scopus 로고
    • Denitrification in the top soil of managed grasslands in the Netherlands in relation to soil type and fertilizer level
    • de Klein, C.A.M., van Logtestijn, R.S.P., 1994. Denitrification in the top soil of managed grasslands in The Netherlands in relation to soil type and fertilizer level. Plant Soil 163, 33-44.
    • (1994) Plant Soil , vol.163 , pp. 33-44
    • De Klein, C.A.M.1    Van Logtestijn, R.S.P.2
  • 16
    • 0033589482 scopus 로고    scopus 로고
    • Nitrous oxide emissions from intensive agricultural systems: Variations between crops and seasons, key driving variables, and mean emission factors
    • Dobbie, K.E., McTaggart, I.P., Smith, K.A., 1999. Nitrous oxide emissions from intensive agricultural systems: variations between crops and seasons, key driving variables, and mean emission factors. J. Geophys. Res. 104, 26891-26899.
    • (1999) J. Geophys. Res. , vol.104 , pp. 26891-26899
    • Dobbie, K.E.1    McTaggart, I.P.2    Smith, K.A.3
  • 17
    • 0025198695 scopus 로고
    • Nitrous oxides emissions from fertilized soils: Summary of available data
    • Eichner, M.J., 1990. Nitrous oxides emissions from fertilized soils: summary of available data. J. Environ. Qual. 19, 272-280.
    • (1990) J. Environ. Qual. , vol.19 , pp. 272-280
    • Eichner, M.J.1
  • 19
    • 0029481488 scopus 로고
    • 4 fluxes in differently managed soils in southern Germany
    • 4 fluxes in differently managed soils in southern Germany. J. Geophys. Res. 100, 23115-23124.
    • (1995) J. Geophys. Res. , vol.100 , pp. 23115-23124
    • Flessa, H.1    Dörsch, P.2    Beese, F.3
  • 22
    • 85103069133 scopus 로고
    • Processes for production and consumption of gaseous nitrogen oxides in soil
    • Harper, L.A., Mosier, A.R., Duxbury, J.M., Rolston, D.E. (Eds.), Agricultural Ecosystem Effects on Trace Gases and Global Climate Change. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, Madison
    • Hutchinson, G.L., Davidson, E.A., 1993. Processes for production and consumption of gaseous nitrogen oxides in soil. In: Harper, L.A., Mosier, A.R., Duxbury, J.M., Rolston, D.E. (Eds.), Agricultural Ecosystem Effects on Trace Gases and Global Climate Change. ASA Special Publication. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, Madison, pp. 79-94.
    • (1993) ASA Special Publication , pp. 79-94
    • Hutchinson, G.L.1    Davidson, E.A.2
  • 23
    • 0012416503 scopus 로고    scopus 로고
    • International Fertilizer Industry Association, Food and Agriculture Organization of the United Nations, Rome
    • 2O from agricultural land. International Fertilizer Industry Association, Food and Agriculture Organization of the United Nations, Rome.
    • (2001) 2O from Agricultural Land
  • 24
    • 0038610460 scopus 로고    scopus 로고
    • Cambridge University Press, Cambridge
    • IPCC (Ed.), 2001a. Climate Change 2001: Mitigation. Cambridge University Press, Cambridge.
    • (2001) Climate Change 2001: Mitigation
  • 26
    • 0028896982 scopus 로고
    • Relationships between nitrogen rate, plant nitrogen concentration, yield and residual nitrate-nitrogen in silage corn
    • Isfan, D., Zizka, J., d'Avignon, A., Deschènes, M., 1995. Relationships between nitrogen rate, plant nitrogen concentration, yield and residual nitrate-nitrogen in silage corn. Commun. Soil Sci. Plant Anal. 26, 2531-2557.
    • (1995) Commun. Soil Sci. Plant Anal. , vol.26 , pp. 2531-2557
    • Isfan, D.1    Zizka, J.2    D'Avignon, A.3    Deschènes, M.4
  • 28
    • 0032192641 scopus 로고    scopus 로고
    • Nitrous oxide release from arable soil: Importance of N-fertilization, crops and temporal variation
    • Kaiser, E.-A., Kohrs, K., Kücke, M., Schnug, E., Heinemeyer, O., Munch, J.C., 1998. Nitrous oxide release from arable soil: importance of N-fertilization, crops and temporal variation. Soil Biol. Biochem. 30, 1553-1563.
    • (1998) Soil Biol. Biochem. , vol.30 , pp. 1553-1563
    • Kaiser, E.-A.1    Kohrs, K.2    Kücke, M.3    Schnug, E.4    Heinemeyer, O.5    Munch, J.C.6
  • 29
    • 0034022379 scopus 로고    scopus 로고
    • Effects of soil structure disturbance on mineralization of organic soil nitrogen
    • Kristensen, H.L., McCarty, G.W., Meisinger, J.J., 2000. Effects of soil structure disturbance on mineralization of organic soil nitrogen. Soil Sci. Soc. Am. J. 64, 371-378.
    • (2000) Soil Sci. Soc. Am. J. , vol.64 , pp. 371-378
    • Kristensen, H.L.1    McCarty, G.W.2    Meisinger, J.J.3
  • 31
    • 0027950218 scopus 로고
    • Corn yield, nitrogen uptake and nitrogen use efficiency as influenced by nitrogen fertilization
    • Liang, B.C., MacKenzie, A.F., 1994. Corn yield, nitrogen uptake and nitrogen use efficiency as influenced by nitrogen fertilization. Can. J. Soil Sci. 74, 235-240.
    • (1994) Can. J. Soil Sci. , vol.74 , pp. 235-240
    • Liang, B.C.1    MacKenzie, A.F.2
  • 32
    • 0020458650 scopus 로고
    • Denitrification potentials: Measurement of seasonal variation using a short-term anaerobic incubation technique
    • Limmer, A.W., Steele, K.W., 1982. Denitrification potentials: measurement of seasonal variation using a short-term anaerobic incubation technique. Soil Biol. Biochem. 14, 179-184.
    • (1982) Soil Biol. Biochem. , vol.14 , pp. 179-184
    • Limmer, A.W.1    Steele, K.W.2
  • 33
    • 0031105743 scopus 로고    scopus 로고
    • Automated gas chromatographic system for rapid analysis of the atmospheric trace gases methane, carbon dioxide, and nitrous oxide
    • Loftfield, N., Flessa, H., Augustin, J., Beese, F., 1997. Automated gas chromatographic system for rapid analysis of the atmospheric trace gases methane, carbon dioxide, and nitrous oxide. J. Environ. Qual. 26, 560-564.
    • (1997) J. Environ. Qual. , vol.26 , pp. 560-564
    • Loftfield, N.1    Flessa, H.2    Augustin, J.3    Beese, F.4
  • 34
    • 0006476368 scopus 로고    scopus 로고
    • Ursachen kleinräumiger Ertragsschwankungen im bayerischen Tertiärhügelland und Folgerungen für eine teilschlagbezogene Düngung
    • Maidl, F.-X., Brunner, R., Sticksel, E., Fischbeck, G., 1999. Ursachen kleinräumiger Ertragsschwankungen im bayerischen Tertiärhü gelland und Folgerungen für eine teilschlagbezogene Düngung. J. Plant Nutr. Soil Sci. 162, 337-342.
    • (1999) J. Plant Nutr. Soil Sci. , vol.162 , pp. 337-342
    • Maidl, F.-X.1    Brunner, R.2    Sticksel, E.3    Fischbeck, G.4
  • 35
    • 0142082915 scopus 로고    scopus 로고
    • Precision farming - The emerging concept of agriculture for today and tomorrow
    • Mandal, D., Ghosh, S.K., 2000. Precision farming - The emerging concept of agriculture for today and tomorrow. Curr. Sci. 79, 1644-1647.
    • (2000) Curr. Sci. , vol.79 , pp. 1644-1647
    • Mandal, D.1    Ghosh, S.K.2
  • 36
    • 0000822494 scopus 로고
    • Modelling nitrous oxide evolution from cropped and native soils
    • Hallberg, R. (Ed.), Ecological Bulletin, Stockholm
    • Mosier, A.R., Parton, W.J., Hutchinson, G.L., 1983. Modelling nitrous oxide evolution from cropped and native soils. In: Hallberg, R. (Ed.), Environmental Biogeochemistry. Ecological Bulletin, Stockholm, pp. 229-241.
    • (1983) Environmental Biogeochemistry , pp. 229-241
    • Mosier, A.R.1    Parton, W.J.2    Hutchinson, G.L.3
  • 37
    • 0025919391 scopus 로고
    • Methane and nitrous oxide fluxes in native, fertilised and cultivated grasslands
    • Mosier, A., Schimel, D., Valentine, D., Bronson, K., Parton, W., 1991. Methane and nitrous oxide fluxes in native, fertilised and cultivated grasslands. Nature 350, 330-332.
    • (1991) Nature , vol.350 , pp. 330-332
    • Mosier, A.1    Schimel, D.2    Valentine, D.3    Bronson, K.4    Parton, W.5
  • 38
    • 0029660928 scopus 로고    scopus 로고
    • Nitrous oxide emissions from agricultural fields: Assessment, measurement and mitigation
    • Mosier, A.R., Duxbury, J.M., Freney, J.R., Heinemeyer, O., Minami, K., 1996. Nitrous oxide emissions from agricultural fields: assessment, measurement and mitigation. Plant Soil 181, 95-108.
    • (1996) Plant Soil , vol.181 , pp. 95-108
    • Mosier, A.R.1    Duxbury, J.M.2    Freney, J.R.3    Heinemeyer, O.4    Minami, K.5
  • 39
    • 0031761595 scopus 로고    scopus 로고
    • 2O budget: Nitrous oxide emissions through the agricultural nitrogen cycle - OECD/IPCC/IEA phase II development of IPCC guidelines for national greenhouse gas inventory methodology
    • 2O budget: nitrous oxide emissions through the agricultural nitrogen cycle -OECD/IPCC/IEA phase II development of IPCC guidelines for national greenhouse gas inventory methodology. Nutr. Cycl. Agroecosyst. 52, 225-248.
    • (1998) Nutr. Cycl. Agroecosyst. , vol.52 , pp. 225-248
    • Mosier, A.1    Kroeze, C.2    Nevison, C.3    Oenema, O.4    Seitzinger, S.5    VanCleemput, O.6
  • 41
    • 0035089451 scopus 로고    scopus 로고
    • Development and application of landform segmentation procedures
    • Pennock, D.J., Corre, M.D., 2001. Development and application of landform segmentation procedures. Soil Till. Res. 58, 151-162.
    • (2001) Soil Till. Res. , vol.58 , pp. 151-162
    • Pennock, D.J.1    Corre, M.D.2
  • 43
    • 0025919199 scopus 로고
    • Sources of nitrous oxide production following wetting of dry soil
    • Rudaz, A.O., Davidson, E.A., Firestone, M., 1991. Sources of nitrous oxide production following wetting of dry soil. FEMS Microbiol. Ecol. 85, 117-124.
    • (1991) FEMS Microbiol. Ecol. , vol.85 , pp. 117-124
    • Rudaz, A.O.1    Davidson, E.A.2    Firestone, M.3
  • 44
    • 0032443410 scopus 로고    scopus 로고
    • Soil compaction and fertilization effects on nitrous oxide and methane fluxes in potato fields
    • Ruser, R., Flessa, H., Schilling, R., Steindl, H., Beese, F., 1998. Soil compaction and fertilization effects on nitrous oxide and methane fluxes in potato fields. Soil Sci. Soc. Am. J. 62, 1587-1595.
    • (1998) Soil Sci. Soc. Am. J. , vol.62 , pp. 1587-1595
    • Ruser, R.1    Flessa, H.2    Schilling, R.3    Steindl, H.4    Beese, F.5
  • 46
    • 84984516634 scopus 로고
    • Denitrification loss from a grassland soil in the field receiving different rates of nitrogen as ammonium nitrate
    • Ryden, J.C., 1983. Denitrification loss from a grassland soil in the field receiving different rates of nitrogen as ammonium nitrate. J. Soil Sci. 34, 355-365.
    • (1983) J. Soil Sci. , vol.34 , pp. 355-365
    • Ryden, J.C.1
  • 47
    • 0000475334 scopus 로고
    • Nitrous oxide emission from soils
    • Sahrawat, K.L., Keeney, D.R., 1986. Nitrous oxide emission from soils. Adv. Soil Sci. 4, 103-148.
    • (1986) Adv. Soil Sci. , vol.4 , pp. 103-148
    • Sahrawat, K.L.1    Keeney, D.R.2
  • 49
    • 0034005672 scopus 로고    scopus 로고
    • Nitrous oxide and carbon dioxide emissions from grassland amended with sewage sludge
    • Scott, A., Ball, B.C., Crichton, I.J., Aitken, M.N., 2000. Nitrous oxide and carbon dioxide emissions from grassland amended with sewage sludge. Soil Use Manage. 16, 36-41.
    • (2000) Soil Use Manage. , vol.16 , pp. 36-41
    • Scott, A.1    Ball, B.C.2    Crichton, I.J.3    Aitken, M.N.4
  • 50
    • 0024226453 scopus 로고
    • Denitrification response to soil wetting in aggregated and unaggregated soil
    • Sexstone, A.J., Parkin, T.B., Tiedje, J.M., 1988. Denitrification response to soil wetting in aggregated and unaggregated soil. Soil Biol. Biochem. 20, 767-769.
    • (1988) Soil Biol. Biochem. , vol.20 , pp. 767-769
    • Sexstone, A.J.1    Parkin, T.B.2    Tiedje, J.M.3
  • 51
    • 0033831413 scopus 로고    scopus 로고
    • Effect of nitrogen fertilization, cropping and irrigation on soil air composition and nitrous oxide emission in a loamy clay
    • Simojoki, A., Jaakkola, A., 2000. Effect of nitrogen fertilization, cropping and irrigation on soil air composition and nitrous oxide emission in a loamy clay. Eur. J. Soil Sci. 51, 413-424.
    • (2000) Eur. J. Soil Sci. , vol.51 , pp. 413-424
    • Simojoki, A.1    Jaakkola, A.2
  • 52
    • 0027086643 scopus 로고
    • Fluxes of nitric and nitrous oxides from agricultural soils in a cool temperate climate
    • Skiba, U., Hargreaves, K.J., Fowler, D., Smith, K.A., 1992. Fluxes of nitric and nitrous oxides from agricultural soils in a cool temperate climate. Atmos. Environ. A 26, 2477-2488.
    • (1992) Atmos. Environ. A , vol.26 , pp. 2477-2488
    • Skiba, U.1    Hargreaves, K.J.2    Fowler, D.3    Smith, K.A.4
  • 53
    • 0018914280 scopus 로고
    • A model of the extent of anaerobic zones in aggregated soils, and its potential application to estimates of denitrification
    • Smith, K.A., 1980. A model of the extent of anaerobic zones in aggregated soils, and its potential application to estimates of denitrification. J. Soil Sci. 31, 263-277.
    • (1980) J. Soil Sci. , vol.31 , pp. 263-277
    • Smith, K.A.1
  • 54
    • 0031406048 scopus 로고    scopus 로고
    • 2O and NO associated with nitrogen fertilization in intensive agriculture, and the potential for mitigation
    • 2O and NO associated with nitrogen fertilization in intensive agriculture, and the potential for mitigation. Soil Use Manage. 13, 296-304.
    • (1997) Soil Use Manage. , vol.13 , pp. 296-304
    • Smith, K.A.1    McTaggart, I.P.2    Tsuruta, H.3
  • 55
    • 0032190367 scopus 로고    scopus 로고
    • Effects of temperature, water content and nitrogen fertilisation on emissions of nitrous oxide by soils
    • Smith, K.A., Thomson, P.E., Clayton, H., McTaggart, I.P., Conen, F., 1998. Effects of temperature, water content and nitrogen fertilisation on emissions of nitrous oxide by soils. Atmos. Environ. 32, 3301-3309.
    • (1998) Atmos. Environ. , vol.32 , pp. 3301-3309
    • Smith, K.A.1    Thomson, P.E.2    Clayton, H.3    McTaggart, I.P.4    Conen, F.5
  • 56
    • 0027786631 scopus 로고
    • Seasonal variations in denitrification and nitrous oxide evolution at the landscape scale
    • van Kessel, C., Pennock, D.J., Farrell, R.E., 1993. Seasonal variations in denitrification and nitrous oxide evolution at the landscape scale. Soil Sci. Soc. Am. J. 57, 988-995.
    • (1993) Soil Sci. Soc. Am. J. , vol.57 , pp. 988-995
    • Van Kessel, C.1    Pennock, D.J.2    Farrell, R.E.3
  • 57
    • 0031728494 scopus 로고    scopus 로고
    • Nitrous oxide emissions from agricultural fields during winter and spring thaw as affected by management practices
    • Wagner-Riddle, C., Thurtell, G.W., 1998. Nitrous oxide emissions from agricultural fields during winter and spring thaw as affected by management practices. Nutr. Cycl. Agroecosyst. 52, 151-163.
    • (1998) Nutr. Cycl. Agroecosyst. , vol.52 , pp. 151-163
    • Wagner-Riddle, C.1    Thurtell, G.W.2
  • 58
    • 0027798373 scopus 로고
    • Denitrification and the dinitrogen/nitrous oxide ratio as affected by soil water, available carbon, and nitrate
    • Weier, K.L., Doran, J.W., Power, J.F., Walters, D.T., 1993. Denitrification and the dinitrogen/nitrous oxide ratio as affected by soil water, available carbon, and nitrate. Soil Sci. Soc. Am. J. 57, 66-72.
    • (1993) Soil Sci. Soc. Am. J. , vol.57 , pp. 66-72
    • Weier, K.L.1    Doran, J.W.2    Power, J.F.3    Walters, D.T.4


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