A protocol for parameterization and calibration of RZWQM2 in field research

Methods of Introducing System Models into Agricultural Research

Volumn 2, Issue , 2015, Pages 1-64

  Ma, L ^a   Ahuja, L R ^a   Saseendran, S A ^a   Malone, R W ^a   Green, T R ^a   Nolan, B T ^b   Bartling, P N S ^a   Flerchinger, G N ^c   Boote, K J ^d   Hoogenboom, G ^e  

^a AGRICULTURAL RESEARCH SERVICE   (United States)

^b U S GEOLOGICAL SURVEY   (United States)

^c NORTHWEST WATERSHED RESEARCH CENTER   (United States)

^d UNIVERSITY OF FLORIDA   (United States)

^e WASHINGTON STATE UNIVERSITY   (United States)

Author keywords

Calibration; Crop information; Parameterization; Potential evapotranspiration; Root zone water quality model; Soil chemical properties; Soil information; Soil nutrient properties; Weather information

Indexed keywords

EID: 85102421757     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.2134/advagricsystmodel2.c1     Document Type: Chapter

References (108)

1. Abrahamson, D.A., D.E. Radcliffe, J.L. Steiner, M.L. Cabrera, D.M. Endale, and G. Hoogenboom. 2006. Evaluation of the RZWQM for simulating tile drainage and leached nitrate in the Georgia Piedmont. Agron. J. 98:644-654.
2. Abrahamson, D.A., D.E. Radcliffe, J.L. Steiner, M.L. Cabrera, J.D. Hanson, K.W. Rojas, H.H. Schom-berg, D.S. Fisher, L. Schwartz, and G. Hoogenboom. 2005. Calibration of the root zone water quality model for simulating tile drainage and leached nitrate in the Georgia Piedmont. Agron. J. 97:1584-1602.
3. Ahuja, L.R. 1986. Characterizati on and modeling of chemical transfer to runoff. Adv. Soil Sci. 4:149-188.
4. Ahuja, L.R., D.K. Cassel, R.R. Bruce, and B.B. Barnes. 1989. Evaluati on of spatial distribution of hydraulic conductivity using effective porosity data. Soil Sci. 148:404-411.
5. Ahuja, L.R., D.G. DeCoursey, B.B. Barnes, and K.W. Rojas. 1993. Characteristics of macropore transport studied with the ARS root zone water quality model. Trans. ASAE 36:369-380.
6. Ahuja, L.R., K.E. Johnsen, and G.C. Heathman. 1995. Macropore transport of a surface-applied bromide tracer: Model evaluation and refinement. Soil Sci. Soc. Am. J. 59:1234-1241.
7. Ahuja, L.R., K.E. Johnsen, and K.W. Rojas. 2000a. Water and chemical transport in soil matrix and macropores. p. 13-50. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
8. Ahuja, L.R., and L. Ma. 2002. Parameterization of agricultural system models: Current Issues and techniques. p. 273-316. In L.R. Ahuja et al. (ed.) Agricultural system models in field research and technology transfer. CRC Press, Boca Raton, FL.
9. Ahuja, L.R., L. Ma, and T.R. Green. 2010. Effective soil properties of heterogeneous areas for modeling infiltration and redistribution. Soil Sci. Soc. Am. J. 74:1469-1482.
10. Ahuja, L.R., K.W. Rojas, J.D. Hanson, M.J. Shaffer, and L. Ma (ed.) 2000b. The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
11. Ahuja, L.R., and R.D. Williams. 1991. Scaling water characteristic and hydraulic conductivity based on Gregson-Hector-McGowan approach. Soil Sci. Soc. Am. J. 55:308-319.
12. Aiken, R.M., G.N. Flerchinger, H.J. Farahani, and K.E. Johnsen. 1997. Energy balance simulation for subsurface and residue temperatures with incomplete cover. Agron. J. 89:404-415.
13. Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. 1998. Crop evapotranspiration: Guidelines for computing crop water requirements. United Nations FAO, Irrigation and Drainage Paper 56. FAO, Rome, Italy.
14. Anothai, J., A. Patanothai, S. Jogloy, K. Pannangpetch, K.J. Boote, and G. Hoogenboom. 2008. A sequential approach for determining the cultivar coefficients of peanut lines using end-of-season data of crop performance trials. Field Crops Res. 108:169-178.
15. Azevedo, A.S., R.S. Kanwar, P. Singh, L.R. Ahuja, and L.S. Pereira. 1997. Simulating atrazine using root zone water quality model for Iowa soil profiles. J. Environ. Qual. 26:153-164.
16. Bakhsh, A., R.S. Kanwar, and L.R. Ahuja. 1999. Simulating the effect of swine manure application on NO3-N transport to subsurface drainage water. Trans. ASAE 42:657-664.
17. Bakhsh, A., L. Ma, L.R. Ahuja, J.L. Hatfield, and R.S. Kanwar. 2004. Using RZWQM to predict herbicide leaching losses in subsurface drainage water. Trans. ASAE 47:1415-1426.
18. Boote, K.J. 1999. Concepts for calibrating crop growth models. p. 179-200. In G.Y. Tsuji et al. (ed.) DSSAT Version 3. Vol. 4-6. International benchmark sites network for agrotechnology transfer. Univ. of Hawaii, Honolulu, HI.
19. Boote, K.J., G. Hoogenboom, J.W. Jones, and K.T. Ingram. 2008. Modeling nitrogen fixation and its relationship to nitrogen uptake in the CROPGRO model. p. 13-46. In L. Ma et al. (ed.) Quantifying and understanding plant nitrogen uptake for systems modeling. CRC Press, Boca Raton, FL.
20. Boote, K.J., J.W. Jones, G. Hoogenboom, and G.G. Wilkerson. 1997. Evaluation of the CROPGRO-Soybean model over a wide range of experiments. p. 113-133. In Kropff et al. (ed.) Systems approaches for sustainable agricultural development: Applications of systems approaches at the field level. Kluwer Academic Publishers, Boston.
21. Boote, K.J., J.W. Jones, G. Hoogenboom, and N.B. Pickering. 1998. The CROPGRO model for grain legumes. p. 99-128. In G.Y. Tsuji, G. Hoogenboom, and P.K. Thornton (ed.)Understanding options for agricultural production. Kluwer Academic Publishers, Boston.
22. Boote, K.J., M.J. Kropff, and P.S. Bindraban. 2001. Physiology and modelling of traits in crop plants: Implications for genetic improvement. Agric. Syst. 70:395-420.
23. Boyle, D.P., H.V. Gupta, and S. Sorooshian. 2000. Toward improved calibrati on of hydrologic models: Combining the strengths of manual and automati c methods. Water Resour. Res. 36:3663-3674.
24. Buis, S., D. Wallach, S. Guillaume, H. Varella, P. Lecharpentier, M. Launay, M. Guerif, J.-E. Bergez, and E. Justes. 2011. The STICS crop model and associated software for analysis, parameterization, and evaluation. p. 395-426. In L.R. Ahuja and L. Ma (ed.) Methods of introducing system models into agricultural research. Advances in Agricultural Systems Modeling 2. ASA, CSSA, and SSSA, Madison, WI.
25. Cameira, M.R., L.R. Ahuja, R.M. Fernando, and L.S. Pereira. 2000. Evalauting field measured soil hydraulic properties in water transport simulations using RZWQM. J. Hydrol. 236:78-90.
26. Cameira, M.R., R.M. Fernando, L.R. Ahuja, and L. Ma. 2007. Using RZWQM to simulate the fate of nitrogen in field soil-crop environment in the Mediterranean region. Agric. Water Manage. 90:121-136.
27. Cameira, M.R., R.M. Fernando, L.R. Ahuja, and L.S. Pereira. 2005. Simulating the fate of water in field soil-crop environment. J. Hydrol. 315:1-24.
28. De Vries, D.A. 1963. Thermal properties of soils. p. 210-235. In W.R. van Wijk (ed.) Physics of plant environment. North-Holland Publishing Company, Amsterdam.
29. Doherty, J. 2010. PEST: Model independent parameter estimation. Watermark Numerical Computing, Brisbane, Australia.
30. Fang, Q.X., T.R. Green, L. Ma, R.W. Malone, R.H. Erskine, and L.R. Ahuja. 2010a. Optimizing soil hydraulic parameters in RZWQM2 using automated calibration methods. Soil Sci. Soc. Am. J. 74:1897-1913.
31. Fang, Q.X., L. Ma, Q. Yu, L.R. Ahuja, R.W. Malone, and G. Hoogenboom. 2010b. Irrigation strategies to improve the water use efficiency of wheat-maize double cropping systems in North China Plain. Agric. Water Manage. 97:1165-1174.
32. Farahani, H.J., and D.G. DeCoursey. 2000. Evaporation and transpiration processes in the soil-residue-canopy system. p. 51-80. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
33. Flerchinger, G.N., R.M. Aiken, K.W. Rojas, and L.R. Ahuja. 2000. Development of the root zone water quality model (RZWQM) for over-winter conditions. Trans. ASAE 43:59-68.
34. Gan, T.Y., E.M. Dlamini, and G.F. Biftu. 1997. Effects of model complexity and structure, data quality, and objective functions on hydrologic modeling. J. Hydrol. 192:81-103.
35. Ghidey, F., E.E. Alberts, and N.R. Kitchen. 1999. Evaluation of RZWQM using field measured data from the Missouri MSEA. Agron. J. 91:183-192.
36. Gray, D.M., and D.H. Male. 1981. Handbook of snow: Principles, processes, management and use. Pergamon Press, New York.
37. Hanson, J.D. 2000. Generic crop production. p. 81-118. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
38. Hanson, J.D., K.W. Rojas, and M.J. Shaffer. 1999. Calibration and evaluation of the root zone water quality model. Agron. J. 91:171-177.
39. Heathman, G.C., L.R. Ahuja, and J.L. Baker. 1986. Test of a non-uniform mixing model for transfer of herbicides to surface runoff. Trans. ASAE 29:450-455.
40. Hoogenboom, G., J.W. Jones, P.W. Wilkens, W.D. Batchelor, W.T. Bowen, L.A. Hunt, N.B. Pickering, U. Singh, D.C. Goldwin, B. Baker, K.J. Boote, J.T. Ritchie, and J.W. White. 1994. Crop models. p. 95-129. In G.Y. Tsuji et al. (ed.) DSSAT version 3, Vol. 2. Univ. of Hawaii, Honolulu.
41. Hoogenboom, G., J.W. Jones, P.W. Wilkens, C.H. Porter, W.D. Batchelor, L.A. Hunt, K.J. Boote, U. Singh, O. Uryasev, W.T. Bowen, A.J. Gijsman, A. du Toit, J.W. White, and G.Y. Tsuji. 2004. Decision Support System for Agrotechnology Transfer Version 4.0 [CD-ROM]. Univ. of Hawaii, Honolulu.
42. Hu, C., S.A. Saseendran, T.R. Green, L. Ma, X. Li, and L.R. Ahuja. 2006. Evaluating nitrogen and water management in a double-cropping system using RZWQM. Vadose Zone J. 5:493-505.
43. Hunt, L.A., S. Pararajasingham, J.W. Jones, G. Hoogenboom, D.T. Imamura, and R.M. Ogoshi. 1993. GENCALC: Software to facilitate the use of crop models for analyzing field experiments. Agron. J. 85:1090-1094.
44. Johnsen, K.E., H.H. Liu, J.H. Dane, L.R. Ahuja, and S.R. Workman. 1995. Simulating fluctuating water tables and tile drainage with a modified Root Zone Water Quality Model and a new model WAFLOWN. Trans. ASAE 38:75-83.
45. Jones, J.W., G. Hoogenboom, C.H. Porter, K.J. Boote, W.D. Batchelor, L.A. Hunt, P.W. Wilkens, U. Singh, A.J. Gijsman, and J.T. Ritchie. 2003. The DSSAT cropping system model. Eur. J. Agron. 18:235-265.
46. Jones, J.W., J. He, K.J. Boote, P. Wilkens, C.H. Porter, and Z. Hu. 2011. Estimating DSSAT cropping system cultivar-specific parameters using Bayesian techniques. p. 365-394. In L.R. Ahuja and L. Ma (ed.) Methods of introducing system models into agricultural research. Advances in Agricultural Systems Modeling 2. ASA, CSSA, and SSSA, Madison, WI.
47. Karlen, D.L., C.A. Cambardella, and R.S. Kanwar. 2004. Challenges of managing liquid swine manure. Appl. Eng. Agric. 20:693-699.
48. Kozak, J.A., and L.R. Ahuja. 2005. Scaling of infiltratt on and redistribute on across soil textural classes. Soil Sci. Soc. Am. J. 69:816-827.
49. Kozak, J.A., L. Ma, L.R. Ahuja, G.N. Flerchinger, and D.C. Nielsen. 2006. Evaluating various water stress calculati ons in RZWQM and RZ-SHAW for corn and soybean producti on. Agron. J. 98:1146-1155.
50. Kozak, J.A., R. Aiken, G.N. Flerchinger, D.C. Nielsen, L. Ma, and L.R. Ahuja. 2007. Quantifying residue architecture effects on soil temperature and water. Soil Tillage Res. 95:84-96.
51. Kumar, A., R.S. Kanwar, and L.R. Ahuja. 1998. Evaluation of preferential flow component of RZWQM in simulating water and atrazine transport to subsurface drains. Trans. ASAE 41:627-637.
52. Legates, D.R., and G.J. McCabe. 1999. Evaluating the use of "goodness-of-fit" measures in hydrologic and hydroclimatic model validation. Water Resour. Res. 35:233-241.
53. Loague, K., and R.E. Green. 1991. Statistical and graphical methods for evaluating solute transport models: Overview and application. J. Contam. Hydrol. 7:51-71.
54. Ma, L., L.R. Ahuja, J.C. Ascough II, M.J. Shaffer, K.W. Rojas, R.W. Malone, and M.R. Cameira. 2000. Integrati ng system modeling with field research in agriculture: Applicati ons of Root Zone Water Quality Model (RZWQM). Adv. Agron. 71:233-292.
55. Ma, L., L.R. Ahuja, and R.W. Malone. 2007a. Systems modeling for soil and water research and management: Current status and needs in the 21st century. Trans. ASABE 50:1705-1713.
56. Ma, L., G. Hoogenboom, L.R. Ahuja, J.C. Ascough II, and S.S. Anapalli. 2006. Evaluation of RZWQM-CERES-maize hybrid for corn production. Agric. Syst. 87:274-295.
57. Ma, L., G. Hoogenboom, L.R. Ahuja, D.C. Nielsen, and J.C. Ascough II. 2005. Development and evaluation of RZWQM-CROPGRO hybrid for soybean production. Agron. J. 97:1172-1182.
58. Ma, L., G. Hoogenboom, S.A. Saseendran, P.N.S. Bartling, L.R. Ahuja, and T.R. Green. 2009. Estimates of soil hydraulic property and root growth factor on soil water balance and crop production. Agron. J. 101:572-583.
59. Ma, L., R.W. Malone, P. Heilman, D.L. Karlen, R.S. Kanwar, C.A. Cambardella, S.A. Saseendran, and L.R. Ahuja. 2007b. RZWQM simulation of long-term crop production, water and nitrogen balances in Northeast Iowa. Geoderma 140:247-259.
60. Ma, L., R.W. Malone, D.B. Jaynes, K.R. Thorp, and L.R. Ahuja. 2008. Simulated effects of nitrogen management and soil microbes on nitrate-N loss in tile drainage and crop production. Soil Sci. Soc. Am. J. 72:1594-1603.
61. Ma, L., D.C. Nielsen, L.R. Ahuja, R.W. Malone, S.A. Saseendran, K.W. Rojas, J.D. Hanson, and J.G. Benjamin. 2003. Evaluation of RZWQM under varying irrigation levels in eastern Colorado. Trans. ASAE 46:39-49.
62. Ma, L., H.D. Scott, M.J. Shaffer, and L.R. Ahuja. 1998b. RZWQM simulations of water and nitrate movement in a manured tall fescue field. Soil Sci. 163:259-270.
63. Ma, L., and H.M. Selim. 1997. Physical nonequilibrium modeling approaches to solute transport in soils. Adv. Agron. 58:95-150.
64. Ma, L., M.J. Shaffer, J.K. Boyd, R. Waskom, L.R. Ahuja, K.W. Rojas, and C. Xu. 1998a. Manure management in an irrigated silage corn field: Experiment and modeling. Soil Sci. Soc. Am. J. 62:1006-1017.
65. Ma, Q.L., L.R. Ahuja, K.W. Rojas, V.F. Ferreira, and D.G. DeCoursey. 1995. Measured and RZWQM predicted atrazine dissipation and movement in a field soil. Trans. ASAE 38:471-479.
66. Ma, Q.L., R.D. Wauchope, J.E. Hook, A.W. Johnson, C.C. Truman, C.C. Dowler, G.J. Gascho, J.G. Davis, H.R. Summer, and L.D. Chandler. 1998c. Influence of tractor wheel tracks and crusts/seals on runoff: Observation and simulations with the RZWQM. Agric. Syst. 57:77-100.
67. Ma, Q.L., R.D. Wauchope, L. Ma, K.W. Rojas, R.W. Malone, and L.R. Ahuja. 2004. Test of the Root Zone Water Quality Model (RZWQM) for predicting runoff of atrazine, Alachlor, and fenami-phos species from conventional-tillage corn mesoplots. Pest Manage. Sci. 60:267-276.
68. Malone, R.W., L.R. Ahuja, L. Ma, R.D. Wauchope, Q.L. Ma, and K.W. Rojas. 2004a. Application of the Root Zone Water Quality Model (RZWQM) to pesticide fate and transport: An overview. Pest Manage. Sci. 60:205-221.
69. Malone, R.W., D. Jaynes, L. Ma, B.T. Nolan, D. Meek, and D. Karlen. 2010. Soil-test N recommendations augmented with PEST-optimized RZWQM simulations. J. Environ. Qual. 39:1711-1723.
70. Malone, R.W., S. Logsdon, M.J. Shipitalo, J. Weatherington Rice, L. Ahuja, and L. Ma. 2003. Tillage effect on macroporosity and herbicide transport in percolate. Geoderma 116:191-215.
71. Malone, R.W., L. Ma, L.R. Ahuja, and K.W. Rojas. 2001a. Evaluation of the Root Zone Water Quality Model (RZWQM): A review. In J.E. Parsons et al. (ed.) Agricultural non-point source water quality models: Their use and application. Southern Coop. Ser. Bull. 398. Available at http://www.bae.ncsu.edu/www3/acad/Regional-Bulletins/Modeling-Bulletin/RZWQM2-word. html (verified 14 Mar. 2011).
72. Malone, R.W., L. Ma, R.D. Wauchope, L. Ahuja, K. Rojas, Q. Ma, R. Warner, and M. Byers. 2004b. Modeling hydrology, metribuzin degradation, and metribuzin transport in macroporous tilled and no till silt loam soil using RZWQM. Pest Manag. Sci. 60:253-266.
73. Malone, R.W., D. Meek, L. Ma, D. Jaynes, B.T. Nolan, and D. Karlen. 2011. Quality assurance of weather data for agricultural system model input. p. xxx-xxx. In L.R. Ahuja and L. Ma (ed.) Methods of introducing system models into agricultural research. Adv. Agric. Systems Modeling 2. ASA, CSSA, SSSA, Madison, WI.
74. Malone, R.W., M.J. Shipitalo, L. Ma, L.R. Ahuja, and K.W. Rojas. 2001b. Macropore component assessment of the Root Zone Water Quality Model (RZWQM) using no-till soil blocks. Trans. ASAE 44:843-852.
75. Martin, D.L., and D.G. Watts. 1999. Application of the root zone water quality model in central Nebraska. Agron. J. 91:201-211.
76. Mavromatis, T., K.J. Boote, J.W. Jones, G.G. Wilkerson, and G. Hoogenboom. 2002. Repeatability of model genetic coefficients derived from soybean performance trials across different states. Crop Sci. 42:76-89.
77. Meisinger, J.J., and G.W. Randall. 1991. Estimating nitrogen budget in soil-crop systems. p. 85-124. In R.F. Follett et al. (ed.) Managing nitrogen for groundwater quality and farm profitability. SSSA, Madison, WI.
78. Monteith, J.L., and M.H. Unsworth. 2008. Principles of environmental physics. 3rd ed. Academic Press, New York.
79. Moriasi, D.N., J.G. Arnold, M.W. Van Liew, R.L. Gingner, R.D. Harmel, and T.L. Veith. 2007. Model evaluati on guidelines for systematic quantificati on of accuracy in watershed simulation. Trans. ASABE 50:885-900.
80. Nash, J.E., and J.V. Sutcliffe. 1970. River flow forecasting through conceptual models. Part 1. A discussion of principles. J. Hydrol. 10:282-290.
81. Nokes, S.E., F.M. Landa, and J.D. Hanson. 1996. Evaluation of the crop component of the root zone water quality model for corn in Ohio. Trans. ASAE 39:1177-1184.
82. Nolan, B.T., R.W. Malone, L. Ma, C.T. Green, M.N. Fienen, and D.B. Jaynes. 2011 Inverse modeling with RZWQM2 to predict water quality. p. 327-364. In L.R. Ahuja and L. Ma (ed.) Methods of introducing system models into agricultural research. Advances in Agricultural Systems Modeling 2. ASA, CSSA, and SSSA, Madison, WI.
83. Nolan, B.T., L.J. Puckett, L. Ma, C.T. Green, E.R. Bayless, and R.W. Malone. 2010. Predicting unsaturated zone nitrogen mass balances in diverse agricultural settings of the United States. J. Environ. Qual. 39:1051-1065.
84. Quisenberry, V.L., R.E. Phillips, and J.M. Zeleznik. 1994. Spatial distribution of water and chloride macropore flow in a well-structured soil. Soil Sci. Soc. Am. J. 58:1294-1300.
85. Rawls, W.J., D.L. Brakensiek, and K.E. Saxton. 1982. Estimation of soil water properties. Trans. ASAE 25:1316-1320, 1328.
86. Ritchie, J.T., U. Singh, D.C. Godwin, and W.T. Bowen. 1998. Cereal growth, development and yield. p. 19-88. In G.Y. Tsuji et al. (ed.) Understanding options for agricultural production. Kluwer Academic Publ., Dordrecht, The Netherlands.
87. Rojas, K.W., L. Ma, J.D. Hanson, and L.R. Ahuja. 2000. RZWQM98 user guide. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
88. Roy, W.R., I.G. Krapac, S.F.J. Chou, and R.A. Griffin. 1992. Batch-type procedures for estimating soil adsorption of chemicals. EPA/530-SW-87-006-F. USEPA, Cincinnati, OH.
89. Saseendran, S.A., L. Ma, D.C. Nielsen, M.F. Vigil, and L.R. Ahuja. 2005. Simulating planting date effects on crop production using RZWQM and CERES-maize models. Agron. J. 97:58-71.
90. Saseendran, S.A., D.C. Nielsen, D. Lyon, L. Ma, D.G. Felter, D.D. Baltensperger, G. Hoogenboom, and L.R. Ahuja. 2009. Modeling responses of dryland spring triticale, proso millet, and foxtail millet to initial soil water in the High Plains. Field Crops Res. 113:48-63.
91. Saseendran, S.A., D.C. Nielsen, L. Ma, L.R. Ahuja, and A.D. Halvorson. 2004. Modeling nitrogen management effects on a winter wheat cropping system using RZWQM and CERES-wheat. Agron. J. 96:615-630.
92. Saseendran, S.A., D.C. Nielsen, L. Ma, L.R. Ahuja, and M.F. Vigil. 2010. Simulating alternative dryland rotati onal cropping systems in the Central Great Plains with RZWQM2. Agron. J. 102:1521-1534.
93. Schepers, J.S., and A.R. Mosier. 1991. Accounting for nitrogen in nonequilibrium soil-crop systems. p. 125-138. In R.F. Follett et al. (ed.) Managing nitrogen for groundwater quality and farm profitability. SSSA, Madison, WI.
94. Shaffer, M.J., K.W. Rojas, D.G. DeCoursey, and C.S. Hebsen. 2000. Nutrient chemistry processes-OMNI. p. 119-144. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
95. Shen, J., W.D. Batchelor, J.W. Jones, J.T. Ritchie, R.S. Kanwar, and C.W. Mize. 1998. Incorporate on of a subsurface ti le drainage component into a soybean growth model. Trans. ASAE 41:1305-1313.
96. Singh, P., R.S. Kanwar, K.E. Johnsen, and L.R. Ahuja. 1996. Calibration and evaluation of subsurface drainage component of RZWQM v2.5. J. Environ. Qual. 25:56-63.
97. Sophocleous, M., M.A. Townsend, F. Vocasek, L. Ma, and K.C. Ashok. 2009. Soil nitrogen balance under wastewater management: Field measurements and simulation results. J. Environ. Qual. 38:1286-1301.
98. Stehouwer, R.C., W.A. Dick, and S.J. Traina. 1993. Characteristi cs of earthworm burrow lining affecting atrazine sorption. J. Environ. Qual. 22:181-185.
99. Stehouwer, R.C., W.A. Dick, and S.J. Traina. 1994. Sorption and retention of herbicides in vertically oriented earthworm and artificial burrows. J. Environ. Qual. 23:286-292.
100. Wallach, D., D. Makowski, and J.W. Jones. 2006. Working with dynamic crop models: Evaluation, analysis, parameterization, and applications. Elsevier, Amsterdam. The Netherlands.
101. Wauchope, R.D., T.M. Buttler, A.G. Hornsby, P.W.M. Augustijn-Beckers, and J.P. Burt. 1992. The SCS/ARS/CES pesticide properties database for environmental decision-making. Rev. Environ. Contam. Toxicol. 123:1-164.
102. Wauchope, R.D., R.G. Nash, L.L. McDowell, K.W. Rojas, L.R. Ahuja, G.H. Willis, T.B. Moorman, and Q. Ma. 2000. Pesticide processes. p. 163-244. In L.R. Ahuja et al. (ed.) The Root Zone Water Quality Model. Water Resources Publ., Highlands Ranch, CO.
103. Wauchope, R.D., K.W. Rojas, L.R. Ahuja, Q.L. Ma, R.W. Malone, and L. Ma. 2004a. Documenting the pesticide processes module of the ARS RZWQM agroecosystem model. Pest Manag. Sci. 60:222-239.
104. Watts, D.G., N.R. Fausey, and D.A. Bucks. 1999. Background of the MSEA-RZWQM modeling project. Agron. J. 91:169-170.
105. Willmott, C.J. 1981. On the validation of models. Phys. Geogr. 2:184-194.
106. Wu, L., R.R. Allmaras, J.A. Lamb, and K.E. Johnsen. 1996. Model sensitivity to measured and estimated hydraulic properties of a Zimmerman fine sand. Soil Sci. Soc. Am. J. 60:1283-1290.
107. Wu, L., W. Chen, J.M. Baker, and J.A. Lamb. 1999. Evaluation of RZWQM field measured data from a sandy soil. Agron. J. 91:177-182.
108. Yu, Q., G.N. Flerchinger, S. Xu, J. Kozak, L. Ma, and L.R. Ahuja. 2007. Simulation of energy balance and water and heat transfer by SHAW and RZ-SHAW. Trans. ASABE 50:1507-1516.