Meeting cereal demand while protecting natural resources and improving environmental quality

Annual Review of Environment and Resources

Volumn 28, Issue , 2003, Pages 315-358

  Cassman, Kenneth G ^a   Dobermann, Achim ^a   Walters, Daniel T ^a   Yang, Haishun ^a  

^a UNIVERSITY OF NEBRASKA LINCOLN   (United States)

Author keywords

Carbon sequestration; Food security; Nitrogen use efficiency; Yield potential

Indexed keywords

AGRICULTURE; ECOSYSTEMS; FOOD SUPPLY; GAS EMISSIONS; GREENHOUSE EFFECT; NATURAL RESOURCES; NITROGEN FERTILIZERS; SOILS;

CARBON SEQUESTRATION; FOOD SECURITY; NITROGEN USE EFFICIENCY; YIELD POTENTIAL;

ENVIRONMENTAL PROTECTION;

EID: 1042272514     PISSN: 15435938     EISSN: None     Source Type: Book Series    
DOI: 10.1146/annurev.energy.28.040202.122858     Document Type: Article

References (138)

1. Wood S, Sebastian K, Scherr SJ. 2000. Pilot Analysis of Global Ecosystems: Agroecosystems. Washington, DC: Int. Food Policy Res. Inst., World Resourc. Inst.
2. Rosegrant MW, Cai X, Cline SA. 2002. World water and food to 2025: dealing with scarcity. Washington, DC: Int. Food Policy Res. Inst. 338 pp.
3. Smil V. 1999. Nitrogen in crop production: An account of global flows. Glob. Biochem. Cycles 13:647-62
4. Dobson P, Bradshaw AD, Baker JM. 1997. Hopes for the future: restoration ecology and conservation biology. Science 277:515-22
5. Matson PA, Parton WJ, Power AG, Swift MJ. 1997. Agricultural intensification and ecosystem properties. Science 277:504-9
6. Vitousek PM, Mooney HA, Lubchenco J, Melillo JM. 1997. Human domination of Earth's ecosystems. Science 277:493-99
7. Rosegrant MW, Paisner MS, Meijer S, Witcover J. 2001. Global Food Projections to 2020: Emerging Trends and Alternative Futures. Washington, DC: Int. Food Policy Res. Inst.
8. Bradford E, Baldwin RL, Blackburn H, Cassman KG, Crosson PR, et al. 1999. Animal agriculture and global food supply. Task Force Rep. 135 Counc. Agric. Sci. Technol. Ames, IA
9. Food Agric. Organ. UN. 2003. FAO-STAT Database-Agricultural Production. http://apps.fao.org
10. Pimentel D, Houser J, Preiss E, White O, Fang H, et al. 1997. Water resources: agriculture, the environment, and society. BioScience 47:97-109
11. Postel SL. 1998. Water for food production: Will there be enough in 2025? BioScience 48:629-37
12. Naylor RL. 1996. Energy and resource constraints on intensive agricultural production. Annu. Rev. Energy Environ. 21:99-123
13. Fischer G, Shah M, van Velthuizen H, Nachtergaele FO. 2000. Global Agro-Ecological Assessment for Agriculture in the 21st Century. Vienna: Int. Inst. Appl. Syst. Anal.
14. Food Agric. Organ. UN. 2002. World Agriculture: Towards 2015/2030. Rome: FAO UN. 97 pp.
15. Young A. 1999. Is there really spare land? A critique of estimates of available cultivable land in developing countries. Environ. Dev. Sustain. 1:3-18
16. Heilig GK. 1999. China food: Can China feed itself? CD-ROM Vers. 1.1 Laxenburg, Austria: Int. Inst. Appl. Syst. Anal.
17. Tilman D, Cassman KG, Matson PA, Naylor RL, Polasky S. 2002. Agricultural sustainability and intensive production practices. Nature 418:671-77
18. Evans LT. 1993. Crop Evolution, Adaptation, and Yield. Cambridge, UK: Cambridge Univ. Press. 500 pp.
19. van Ittersum MK, Rabbinge R. 1997. Concepts in production ecology for analysis and quantification of agricultural input-output combinations. Field Crops Res. 52:197-208
20. Cassman KG. 1999. Ecological intensification of cereal production systems: yield potential, soil quality, and precision agriculture. Proc. Natl. Acad. Sci. USA 96:5952-59
21. Matthews RB, Kropff MJ, Horie T, Bachelet D. 1997. Simulating the impact of climate change on rice production in Asia and evaluating options for adoption. Agric. Syst. 54:399-425
22. Dawe D, Dobermann A. 2001. Yield and productivity trends in intensive rice-based cropping systems of Asia. In Yield Gap and Productivity Decline in Rice Production, pp. 97-115 Rome: FAO UN
23. Dawe D, Dobermann A, Moya P, Abdularchman S, Bijay S. et al. 2000. How widespread are yield declines in long-term rice experiments in Asia? Field Crops Res. 66:175-93
24. Kropff MJ, Cassman KG, Peng S, Mathews RB, Setter TL. 1994. Quantitative understanding of yield potential. In Breaking the Yield Barrier, ed. KG Cassman, pp. 21-38. Los Baños, Philipp.: Int. Rice Res. Inst.
25. Peng S, Cassman KG, Virmani SS, Sheehy JE, Khush GS. 1999. Yield potential trends of tropical rice since the release of IR8 and the challenge of increasing rice yield potential. Crop Sci. 39:1552-59
26. Peng S, Khush GS. 2003. Four decades of breeding for increased yield potential of irrigated rice in the International Rice Research Institute. Plant Prod. Sci. (Jpn.) 6(3):157-64
27. Peng S, Laza RC, Visperas RM, Sanico AL, Cassman KG, Khush GS. 2000. Grain yield of rice cultivars and lines developed in the Philippines since 1966. Crop Sci. 40:307-14
28. De Datta SK, Tauro AC, Baloing SN. 1968. Effect of plant type and nitrogen level on growth characteristics and grain yield of indica rice in the tropics. Agron. J. 60:643-47
29. Duvick DN, Cassman KG. 1999. Post-green revolution trends in yield potential of temperate maize in the North-Central United States. Crop Sci. 39:1622-30
30. Natl. Corn Grow. Assoc. 2003. National Corn Growers Association - Corn Yield Contest. http://www.ncga.com//02profits/CYC/main/index.html
31. Austin RB, Ford MA. 1989. Effects of nitrogen fertilizer on the performance of old and new varieties of winter wheat. Vortr. Pflanzenzucht 16:307-15
32. Sayre KD, Singh RP, Huerta-Espino J, Rajaram S. 1998. Genetic progress in reducing yield losses to leaf rust in CIMMYT-derived Mexican spring wheat cultivars. Crop Sci. 38:654-59
33. Brancourt-Hulmel M, Doussinault G, Lecomte C, Berard P, Le Buanec B, Trotter M. 2003. Genetic improvement of agronomic traits of winter wheat cultivars released in France from 1946 to 1992. Crop Sci. 43:37-45
34. Matthews RB, Kropff MJ, Bachelet D, van Laar HH. 1995. Modeling the impact of climate change on rice production in Asia. Wallingford, UK: CAB Int., Int. Rice Res. Inst.
35. Sinclair TR, Horie T. 1989. Leaf nitrogen, photosynthesis, and crop radiation use efficiency: a review. Crop Sci. 29:90-98
36. Pretty J, Brett C, Gee D, Hine RE, Mason CF, et al. 2000. An assessment of the total external costs of UK agriculture. Agric. Syst. 65:113-36
37. Schweigert P, van der Ploeg RR. 2000. Nitrogen use efficiency in German agriculture since 1950: facts and evaluation. Ber. Landwirtsch. 80:185-212
38. Cassman KG, Dobermann A, Walters DT. 2002. Agroecosystems, nitrogen-use efficiency, and nitrogen management. Ambio 31:132-40
39. Poudel DD, Horwarth WR, Lanini WT, Temple SR, van Bruggen AHC. 2002. Comparison of soil N availability and leaching potential, crop yields and weeds in organic, low-input and conventional farming systems in northern California. Agric. Ecosyst. Environ. 90:125-37
40. Di HJ, Cameron KC. 2002. Nitrate leaching in temperate agroecosystems: sources, factors and mitigating strategies. Nutr. Cycl. Agroecosyst. 64:237-56
41. Hansen B, Alroe HF, Kristensen ES. 2001. Approaches to assess the environmental impact of organic farming with particular regard to Denmark. Agric. Ecosyst. Environ. 83:11-26
42. Stivers LJ, Shennan C. 1991. Meeting the nitrogen needs of processing tomatoes through winter cover cropping. J. Prod. Agric. 4:330-35
43. Schluter W, Hennig A, Brummer G. 1997. Nitrate transport in soils of a river flood plain under organic and conventional farming - analytical results, modeling and balances. Z. Pflanzenernaehr. Bodenk. 160:57-65
44. Eltun R. 1995. Comparisons of nitrogen leaching in ecological and conventional cropping systems. Biol. Agric. Hortic. 11:103-14
45. Stopes C, Lord EI, Phillips L, Woodward L. 2002. Nitrate leaching from organic farms and conventional farms following best practice. Soil Use Manag. 18:256-63
46. Kirchmann H, Bergstroem L. 2001. Do organic farming practices reduce nitrate leaching? Commun. Soil Sci. Plant Anal. 32:997-1028
47. Flessa H, Wild U, Klemisch M, Pfadenhauer J. 1998. Nitrous oxide and methane fluxes from organic soils under agriculture. Eur. J. Soil Sci. 49:327-35
48. 2O) from two farming systems in southern Germany. Agric. Ecosyst. Environ. 91:175-89
49. van der Werden TJ, Sherlock RR, Williams PH, Cameron K. 2000. Effect of three contrasting onion (Allium cepa L.) production systems on nitrous oxide emissions from soil. Biol. Fertil. Soils 31:334-42
50. Wang ZY, Xu YC, Li Z, Guo YX, Wassmann R, et al. 2000. A four-year record of methane emissions from irrigated rice fields in the Beijing region of China. Nutr. Cycl. Agroecosyst. 58:55-63
51. Wassmann R, Neue HU, Alberto MCR, Lantin RS, Bueno C, et al. 1996. Fluxes and pools of methane in wetland rice soils with varying organic inputs. Environ. Monit. Assess. 42:163-73
52. Mäder P. Fliessbach A, Dubois D, Gunst L, Fried P, Niggli U. 2002. Soil fertility and biodiversity in organic forming. Science 296:1694-97.
53. Eltun R, Korsaeth A, Nordheim O. 2002. A comparison of environmental, soil fertility, yield, and economical effects in six cropping systems based on an 8-year experiment in Norway. Agric. Ecosyst. Environ. 90:155-68
54. Dawe D. 2000. The contribution of rice research to poverty alleviation. In Redesigning Rice Photosynthesis to Increase Yield, ed. JE Sheehy, PL Mitchell, B Hardy, pp. 3-12. Makati City, Phillipp./Amsterdam: Int. Rice Res. Inst., Elsevier Sci.
55. Senauer B, Sur M. 2001. Ending global hunger in the 21st century: projections of the number of food insecure people. Rev. Agric. Econ. 23:68-81
56. Dawe D, Dobermann A. 1999. Defining productivity and yield. IRRD Discuss. Pap. Ser. 33. Int. Rice Res. Inst. Makati City, Philipp.
57. Novoa R, Loomis RS. 1981. Nitrogen and plant production. Plant Soil 58:177-204
58. Cassman KG, Gines HC, Dizon M, Samson MI, Alcantara JM. 1996. Nitrogen-use efficiency in tropical lowland rice systems: contributions from indigenous and applied nitrogen. Field Crops Res. 47:1-12
59. Bell MA. 1993. Organic matter, soil properties, and wheat production in the high valley of Mexico. Soil Sci. 156:86-93
60. Kolberg RL, Westfall DG, Peterson GA. 1999. Influence of cropping intensity and nitrogen fertilizer rates on in situ nitrogen mineralization. Soil Sci. Soc. Am. J. 63:129-34
61. Cassman KGH, Dobermann A, Santa Cruz PC, Gines HC, Samson MI, et al. 1996. Soil organic matter and the indigenous nitrogen supply of intensive irrigated rice systems in the tropics. Plant Soil 182:267-78
62. Dobermann A, Witt C, Abdulrachman S, Gines HC, Nagarajan R, et al. 2003. Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice. Agron. J. 95:924-35
63. Tilman D, Fargione J, Wolff B, D'Antonio C, Dobson A, et al. 2001. Forecasting agriculturally driven global environmental change. Science 292:281-84
64. Int. Fertil. Ind. Assoc. 2002. Fertilizer use by crop. Rome: IFA, IFDC, IPI, PPI, FAO
65. Int. Fertil. Ind. Assoc. 2003. IFADATA Statistics. http://www.fertilizer.org/ifa/statistics.asp
66. Cassman KG, Pingali PL. 1995. Intensification of irrigated rice systems: learning from the past to meet future challenges. GeoJ. 35:299-305
67. US Dep. Agric., Natl. Agric. Stat. Serv. 2003. Agricultural Statistics Database. http:/www.nass.usda.gov
68. Dobermann A, Witt C, Dawe D, Gines GC, Nagarajan R, et al. 2002. Site-specific nutrient management for intensive rice cropping systems in Asia. Field Crops Res. 74:37-66
69. Dobermann A. 2000. Future intensification of irrigated rice systems. In Redesigning Rice Photosynthesis to Increase Yield, ed. JE Sheehy, PL Mitchell, B Hardy, pp. 299-47. Makati City, Philipp./Amsterdam: Int. Rice Res. Inst., Elsevier Sci.
70. UN. 1998. World Population Prospects. New York: UN
71. Food Agric. Organ. UN. 2000. Fertilizer Requirements in 2015 and 2030. Rome: FAO UN
72. Bumb B, Baanante CA. 1996. The role of fertilizer in sustaining food security and protecting the environment to 2020. Discuss. Pap. 17. Washington, DC: Int. Food Policy Res. Inst.
73. Frink CR, Waggoner PE, Ausubel JH. 1999. Nitrogen fertilizer: retrospect and prospect. Proc. Natl. Acad. Sci. USA 96:1175-80
74. Dobermann A, Cassman KG. 2002. Plant nutrient management for enhanced productivity in intensive grain production systems of the United States and Asia. Plant Soil 247:153-75
75. Suzuki A. 1997. Fertilization of Rice in Japan. Tokyo, Jpn.: Jpn. FAO Assoc. 1-111 pp.
76. Mishima S. 2001. Recent trend of nitrogen flow associated with agricultural production in Japan. Soil Sci. Plant Nutr. 47:157-66
77. Peng S, Cassman KG. 1998. Upper thresholds of nitrogen uptake rates and associated N fertilizer efficiencies in irrigated rice. Agron. J. 90:178-85
78. Peng S, Garcia FV, Laza RC, Sanico AL, Visperas RM, Cassman KG. 1996. Increased N-use efficiency using a chlorophyll meter on high-yielding irrigated rice. Field Crops Res. 47:243-52
79. Dobermann A, White PF. 1999. Strategies for nutrient management in irrigated and rainfed lowland rice systems. Nutr. Cycl. Agroecosyst. 53:1-18
80. Witt C, Balasubramaniam V, Dobermann A, Buresh RJ. 2002. Nutrient management. In Rice: A Practical Guide to Nutrient Management, ed. TH Fairhurst, C Witt, pp. 1-45. Manila/Singapore: Int. Rice Res. Inst., Potash & Phosphate Inst./Potash & Phosphate Inst. Can.
81. Wang GH, Dobermann A, Witt C, Sun QZ, Fu RX. 2001. Performance of site-specific nutrient management for irrigated rice in southeast China. Agron. J. 93:869-78
82. Matson PA, Naylor RL, Ortiz-Monasterio I. 1998. Integration of environmental, agronomic, and economic aspects of fertilizer management. Science 280:112-15
83. Riley WJ, Ortiz-Monasterio I, Matson PA. 2003. Nitrogen leaching and soil nitrate, nitrite, and ammonium levels under irrigated wheat in Northern Mexico. Nutr. Cycl. Agroecosyst. 61:223-36
84. Melillo JM, Prentice IC, Farquhar GD, Schulze ED, Sala OE. 1996. Terrestrial biotic responses to environmental change and feedbacks to climate. In Climate Change 1995. The Science of Climate Change, ed. JT Houghton, LG Meira Filho, BA Callander, N Harris, A Kattenberg, K Maskell, pp. 445-481. Cambridge, UK: IPCC, Cambridge Univ. Press
85. Metting FB, Smith JL, Amthor JS. 1998. Science needs and new technologies for soil carbon sequestration. In Carbon sequestration in soils: science, monitoring, and beyond. Proc. St. Michaels Workshop, Dec., ed. NJ Rosenberg, pp. 1-34. Columbus, OH: Battelle
86. Intergov. Panel Clim. Chang. 1996. Climate change 1995. The science of climate change. Work group 1. Cambridge: IPCC., Cambridge Univ. Press.
87. 2. In The Role of Terrestrial Vegetation in the Global Carbon Cycle: Measurement by Remote Sensing, ed. GM Woodwell, pp. 111-27. New York: Wiley
88. Houghton RA. 1995. Changes in the storage of terrestrial carbon since 1850. In Soils and Global Change, ed. R Lal, JM Kimble, E Levine, BA Stewart, pp. 45-65. Boca Raton, FL: CRC
89. West TO, Marland G. 2002. A synthesis of carbon sequestration, carbon emissions, and net carbon flux in agriculture: comparing tillage practices in the United States. Agric. Ecosyst. Environ. 91:217-32
90. Hair D, Sampson RN, Hamilton TE. 1996. Summary: forest management opportunities for increasing carbon storage. In Forests and Global Change: Vol. 2: Forest Management Opportunities for Mitigating Carbon Emissions, ed. RN Sampson, D Hair, pp. 237-54. Washington, DC: Am. Forests
91. Lal R, Kimble JM, Follett RF, Cole CV. 1998. The Potential of U.S. Cropland to Sequester Carbon and Mitigate the Greenhouse Effect. Chelsea, MI: Arbor. 128 pp.
92. Intergov. Panel Clim. Chang. 2000. Land use, land-use change, and forestry. Spec. Rep. IPCC, Cambridge, UK
93. 2 emissions. Soil Use Manag. 13:230-44
94. Dumanski J, Desjardins RL, Tarnocai C, Monreal C, Gregorich EG, et al. 1998. Possibilities for future carbon sequestration in Canadian agriculture in relation to land use changes. Clim. Chang. 40:81-103
95. 2. Nature 411:466-69
96. Lal R, Kimble JM, Follett RF. 1999. Agricultural practices and policies for carbon sequestration in soil. Recomm. Conclus. Int. Symp. 19-23 July, Columbus, OH, 12 pp.
97. Waggoner PE. 1994. How much land can ten billion people spare for nature? Task Force Rep. 121. Counc. Agric. Sci. Technol. Ames, IA
98. Cassman KG. 2001. Crop science research to assure food security. In Crop science: progress and prospects. Presented at 3rd Int. Crop Sci. Congr., Hamburg, Ger., 2000, ed. J Nösberger, HH Geiger, PC Struik, pp. 33-51. Wallingford, UK: CABI
99. West TO, Post WM 2002. Soil organic carbon sequestration rates by tillage and crop rotation: a global data analysis. Soil Sci. Soc. Am. J. 66:1930-46
100. Dick WA, Blevins RL, Frye WW, Peters SE, Christenson DR, et al. 1998. Impacts of agricultural management practices on C sequestration in forest-derived soils of the eastern Corn Belt. Soil Tillage Res. 47:235-44
101. Natl. Assess. Synth. Team. 2000. Climate Change Impacts on the United States: The Potential Consequences of Climate Variability and Change. Washington, DC: US Glob. Chang. Res. Program
102. Vleeshouwers LM, Verhagen A. 2002. Carbon emission and sequestration by agricultural land use: a model study for Europe. Glob. Chang. Biol. 8:519-30
103. Smith P, Goulding KWT, Smith KA, Powlson DS, Smith JU, et al. 2001. Enhancing the carbon sink in European agricultural soils: including trace gas fluxes in estimates of carbon mitigation potential. Nutr. Cycl. Agroecosyst. 60:237-52
104. Eve MD, Sperow M, Howerton K, Paustian K, Follett RF. 2002. Predicted impact of management changes on soil carbon storage for each cropland region of the conterminus United States. J. Soil Water Conserv. 57:196-204
105. Smith P, Powlson DS, Smith JU, Falloon P, Coleman K. 2000. Meeting Europe's climate change commitments: quantitative estimates of the potential for carbon mitigation by agriculture. Glob. Chang. Biol. 6:525-39
106. Jones CA, Kiniry JR. 1986. CERES-Maize: A Simulation Model of Maize Growth and Development. College Station: Tex. A&M Univ. Press
107. Muchow RC, Sinclair TR, Bennett JM. 1990. Temperature and solar radiation effects on potential maize yields across locations. Agron. J. 82:338-42
108. Kropff MJ, van Laar HH. 1993. Modelling Crop-Weed Interactions. Wallingford, UK: CABI
109. Parton WJ, Schimel DS, Cole CV, Ojima DS. 1987. Analysis of factors controlling soil organic matter levels in Great Plains grasslands. Soil Sci. Soc. Am. J. 51:1173-79
110. Metherell AK, Harding LA, Cole CV, Parton WJ. 1993. Century Soil Organic Matter Model Environment. Technical Documentation, Agroecosystem Version 4.0. Fort Collins, CO: USDA, Agric. Res. Serv.
111. Greenland DJ. 1998. Carbon sequestration in soil: knowledge gaps indicated by the symposium presentations. See Ref. 138, pp. 591-94
112. Izaurralde RC, Rosenberg NJ, Lal R. 2001. Mitigation of climatic change by soil carbon sequestration: issues of science, monitoring, and degraded lands. Adv. Agron. 70:1-75
113. Herrick JE, Wander MM. 1997. Relationship between soil organic carbon and soil quality in cropped and rangeland soils: the importance of distribution, composition and soil biological activity. See Ref. 138, pp. 405-25
114. Paustian K, Collins HP, Paul EA. 1997. Management controls on soil carbon. In Soil Organic Matter in Temperate Agroecosystems, ed. EA Paul, K Paustian, ET Elliott, CV Cole, pp. 15-49. Boca Raton, FL: CRC
115. Halvorson AD, Reule CA, Follett RF. 1999. Nitrogen fertilization effects on soil carbon and nitrogen in a dryland cropping system. Soil Sci. Soc. Am. J. 63:912-17
116. Bouwman AF. 1990. Exchange of greenhouse gases between terrestrial ecosystems and the atmosphere. In Soils and the Greenhouse Effect, ed. AF Bouwman, pp. 61-127. Chichester, UK: Wiley.
117. Intergov. Panel Clim. Chang. 1996. The Revised 1996 Guidelines for National Greenhouse Gas Inventories. Vol. 1-3, Geneva, Switz.: IPCC
118. 2O and NO associated with nitrogen fertilization in intensive agriculture, and the potential for mitigation. Soil Use Manag. 13:296-304
119. Breitenbeck GA, Bremner JM. 1986. Effects of rate and depth of fertilizer application on emission of nitrous oxide from soil fertilized with anhydrous ammonia. Biol. Fertil. Soils 2:201-4.
120. 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. 51:413-24
121. Eichner MJ. 1990. Nitrous oxide emissions from fertilized soils: summary of available data. J. Environ. Qual. 19:272-80
122. Robertson GP, Paul EA, Harwood RR. 2000. Greenhouse gases in intensive agriculture: contributions of individual gases to the radiative forcing of the atmosphere. Science 289:1922-25
123. Collins HP, Blevins RL, Bundy LG, Christenson DR, Dick WA, et al. 1999. Soil carbon dynamics in corn-based agroecosystems: results from carbon-13 natural abundance. Soil Sci. Soc. Am. J. 63:584-91
124. Aulakh MS, Doran JW, Walters DT, Mosier AR, Francis DD. 1991. Crop residue type and placement effects of denitrification and mineralization. Soil Sci. Soc. Am. J. 55:1020-25
125. Weier KL, Doran JW, Power JF, Walters DT. 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
126. Qian JH, Doran JW, Weier KL, Mosier AR, Peterson TA, Power JF. 1997. Soil denitrification and nitrous oxide losses under corn irrigated with high-nitrate groundwater. J. Environ. Qual. 26:348-60
127. Cates RL, Keeney DR. 1987. Nitrous oxide production throughout the year from fertilized and manured maize fields. J. Environ. Qual. 16:443-47
128. Cochran VL, Elliott LF, Papendick RI. 1981. Nitrous oxide emissions from a fallow field fertilized with anhydrous ammonia. Soil Sci. Soc. Am. J. 45:307-10
129. Bronson KF, Mosier AR, Bishnoi SR. 1992. Nitrous oxide emissions in irrigated corn as affected by nitrification-denitrification. Soil Sci. Soc. Am. J. 56:161-65
130. 2O emissions. J. Geophys. Res. 104:18487-503
131. Hutchinson GL, Guenzi WD, Livingston GP. 1993. Soil water controls on aerobic emissions of gaseous N oxides. Soil Biol. Biochem. 25:1-9
132. Kessavalou A, Doran JW, Mosier AR, Drijber RA. 1998. Greenhouse gas fluxes following tillage and wetting in a wheat-fallow cropping system. J. Environ. Qual. 27:1105-16
133. x modeling: status and limitations. Nutr. Cycl. Agroecosyst. 48: 25-35
134. Schlesinger WH. 2000. Carbon sequestration in soils: some cautions amidst optimism. Agric. Ecosyst. Environ. 82:121-27
135. Pinstrup-Andersen P, Pandya-Lorch R, Rosegrant MW. 1999. World Food Prospects: Critical Issues for the Early Twenty-First Century. Washington, DC: Int. Food Policy Res. Inst. 32 pp.
136. Evans LT. 1998. Feeding the Ten Billion: Plants and Population Growth. Cambridge, UK: Cambridge Univ. Press
137. Dyson T. 1996. Population and Food: Global Perspectives. London: Routledge
138. Lal R, Kimble JM, Stewart BA, eds. 1998. Soil Processes and the Carbon Cycle. Boca Raton, FL: CRC