100. Mori, Y., J.W. Hopmans, A.Mortensen and G.J. Kluitenberg. 2005. Estimation of vadose zone water flux from multi-functional heat pulse probe measurements. Soil Sci. Soc. Amer. J. 69:599-606.

99. Gardenas, A., J.W. Hopmans, B.R. Hanson, and J. Šimunek. 2005. Two-dimensional modeling of Nitrate Leaching for Different Fertigation Strategies under Micro-Irrigation. Agric. Water Management 74:219-242.

98. Wildenschild, D., J.W. Hopmans, M.L. Rivers and A.J.R. Kent 2005. Quantitative analysis of flow processes in a sand using synchrotron x-ray microtomography. Vadose Zone Journal 4:112-126.

97. Koumanov, K., J.W. Hopmans and L.J. Schwankl. 2005. Soil water dynamics in the root zone of a micro-sprinkler irrigated almond tree. IN: Proceedings of the IVth International Symposum on Irrigation of Horticultural Crops (Ed. R. L. Snyder), Sept 1-6, 2003. Davis, CA. Acta Horticulturae, ISHS 664: 369-373.

96. Hopmans, J.W. 2004. Review of ‘The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect’ (Eds. J.M. Kimble, Linda S. Heath, Richard A. Birdsey, and R.Lal). Vadose Zone J. 2004 3:734-735.

95. Vrugt, J.A., G.H. Schoups, Jan W. Hopmans, C. Young, W.W. Wallender, T.H. Harter and W. Bouten. 2004. Inverse modeling of large-scale spatially-distributed vadose zone properties using global optimization. Water Resour. Res. 40:W06503, doi:10.1029/2003WR002706.

94. Minasny, B., J.W. Hopmans, T.H. Harter. A.M. Tuli. S.O. Eching and D.A. Denton. 2004. 2004. Neural network prediction of soil hydraulic functions for alluvial soils using multi-step outflow data. Soil Science Soc. Amer. J. 68:417-429

93. Tuli, A.M., and J.W. Hopmans. 2004. Effect of degree of saturation on transport coefficients in disturbed soils. European Journal of Soil Science. 55:147-164.

92. Mori, Y., J.W. Hopmans, A.P. Mortensen, and G.J. Kluitenberg. 2003. Multi-functional heat pulse probe for the simultaneous measurement of soil water content, solute concentration and heat transport parameters. Vadose Zone Journal 2:561-571.

91. Bassoi, L.H., J.W. Hopmans, L.A. de C. Jorge, C.M. De Alencar, and J.A.M.E. Silva. 2003.
Grapevine root distribution in drip and microsprinkler irrigation using monolith and the soil
profile method. Scientia Agricola. Vol. 60(2): 377-387.

90. Hopmans, J.W. 2003. Review of Soil Physics Companion by A.W. Warrick. Soil Science. Vol. 167:838-839.

89. Vrugt, J.A., W Bouten, H.V. Gupta, and J.W. Hopmans. 2003 Toward improved identifiability of soil hydraulic parameters: On the selection of a suitable parametric model. Vadose Zone Journal 2:98-113.

88. Hopmans, J.W., P. Nkedi-Kizza and O. Wendroth. 2003. Preface: Soil Hydrological properties and processes and their variability in space and time. J. of Hydrol 272:1-2.

87. Corwin D.L., S. R. Kaffka, J.W. Hopmans, Y. Mori, J. W. van Groenigen, C. van Kessel, S. M. Lesch, and J.D. Oster. 2003. Assessment and Field-scale Mapping of Soil Quality Properties of a Saline-sodic Soil. Geoderma 1952:1-29

86. Vaz, C.M. P., A. Macedo, L.H. Bassoi, D. Wildenschild and Jan. W. Hopmans. 2002. Retention curves obtained by a combined tensiometer-coiled TDR probe. Soil Science Society Journal 66:1752-1759.

85. Dourado-Neto, D, D.R. Nielsen, J.W. Hopmans, K. Reichardt, and Bacchi, O, O. S. 2000. Software to model soil water retention curves (SWRC, version 2.00). Scientia Agricola, 57:191-192.

84. Wildenschild, D., J.W. Hopmans, C.M.P. Vaz, M.L. Rivers, D. Rikard, and B.S.B. Christensen. 2002. Using X-ray computed tomography in hydrology: systems, resolutions, and limitations. J. of Hydrology 267:285-297.

83. Schoups, G. and J.W. Hopmans. 2002. Analytical solution of vadose zone convective solute transport with root water and nutrient uptake. Vadose Zone Journal 1(1):158-171.

82. Hopmans, J.W., 2002. Review of Vadose Zone Technology and Solutions. Vadose Zone Journal 1(1):199-200.

81. Wildenschild, D., J.W. Hopmans, C.M.P. Vaz, and M.L. Rivers. 2001. Using x-ray beams to study flow processes in underground porous media. Advanced Photon Source Research 4: 48-50.

80. Hopmans, Jan W., K.L. Bristow, and J. Simunek. 2001. Indirect estimation of soil thermal properties and water flux from heat pulse measurements: Geometry and dispersion effects. Water Resources Research 38(1):7-1 to 7-14.

79. Hopmans, J.W., and K.L. Bristow. 2001. Current capabilities and future needs of root water and nutrient uptake modeling. Advances in Agronomy. Volume 77: 104-175, 2002.

78. Hopmans, J.W., and K.L. Bristow, 2001. Review: Soil and Environmental Analysis”
Physical Methods. Geoderma 103:355-357.

77. Vrugt, J.A., M.T. van Wijk, J.W. Hopmans, and J. Simunk. 2001. One, two, and three- dimensional root water uptake functions for transient modeling. Water Resour. Res. 37:2457-2470.

76. Vaz, C.M., L. Bassoi, and J. W. Hopmans. 2001. Influence of soil water content and bulk density on soil strength as determined from combined cone penetrometer-TDR probe field measurements. Soil & Tillage Research 1587:1-8..

75. Teruel, D.A., D. Dourado-Neto, J.W. Hopmans, and K. Reichardt. 2001. Structural changes in soybean root system as a response to soil phosphorus availability. Scientia Agricola. Vol. 58:5-60 (In Portuguese).

74. Teruel, D.A., D. Dourado-Neto, J.W. Hopmans, and K. Reichardt. 2000. Mathematical modeling as a tool for the analysis of growth and architecture of root systems. Scientia Agricola. Vol. 57:683-691 (In Portuguese).

73. Tuli, A., K. Kosugi and J.W. Hopmans. 2001. Simultaneous scaling of soil water retention and unsaturated hydraulic conductivity functions assuming lognormal pore-size distribution. Adv. Water Resour. 24:677-688.

72. Vrugt, J.A., J.W. Hopmans and J. Simunek. 2001. Calibration of a two-dimensional root water uptake. Soil Sci. Soc. Amer. J. 65:1027-1037.

71. Vaz, C.M., and J.W. Hopmans. 2001. Simultaneous measurements of soil penetration
resistance and water content with a combined penetrometer-TDR moisture probe. Soil Sci. Soc. Amer. J.65:4-12.

70. Hopmans, J. W. and J. Šimunek. 1999. Review of inverse estimation of soil hydraulic properties. In: Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media, eds. M. Th. van Genuchten, F. J. Leij and L. Wu, University of California, Riverside, CA, 643-659, 1999.

69. Wildenschild, D., J.W. Hopmans and J. Simunek. 2001. Flow Rate Dependence of Soil Hydraulic Characteristics. Soil Sci. Soc. Amer. J. 65:35-48.

68. Simunek, J., J.W. Hopmans, D.R. Nielsen and M.Th. van Genuchten. 2000. Horizontal infiltration revisited using parameter estimation. Soil Sci. 165(9):708-717.

67. Inoue, M., J. Simunek, S. Shioawa, and J.W. Hopmans. 2000. Simultaneous estimation of soil hydraulic and solute transport parameters from transient infiltration experiments. Adv. Water Resourc. 23, 677-688.

66. Clausnitzer, C., and J.W. Hopmans. 2000. Pore-scale measurements of solute breakthrough using microfocus computed tomography. Water Resources Research 36:2067-2079.

65. Serrarens, D., J.L. MacIntyre, J.W. Hopmans and L. H. Bassoi. 2000. Field calibration of a multilevel TDR probe. Scientia Agriocola. 57(2):349-354

64. Hopmans, J.W. 1999. REVIEW: Isotope Tracers in Catchment Hydrology by C. Kendall and J.J. McDonnell (Eds.), 1998, Elsevier Science B.V. Advances in Water Resources. Vol 23(4):441-442.

63. Schwankl, L.J, J.Pl Edstrom, J.W. Hopmans, L. Andreu and K.S. Koumanov. 1999. Micro sprinklers wet larger soil volume; boost almond yield, tree growth. California Agriculture Vol. 53(2):39-43.

62. Wildenschild D. and J.W. Hopmans. 1999. Flow-rate dependence of soil hydraulic
properties for unsaturated porous media. In Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media, eds. M. Th. van Genuchten, F. J. Leij and L. Wu, University of California, Riverside, CA, 643-659, 1999.

61. Harter, T.H., K. Heeren, G. Weissman, W.R. Horwath and J.W. Hopmans. 1998. Field-scale characterization of a heterogeneous, moderately deep vadose zone: the Kearney Research Site. In Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media, eds. M. Th. van Genuchten, F. J. Leij and L. Wu, University of California, Riverside, CA, 643-659, 1999.

60. Clausnitzer, V., and J.W. Hopmans. 1999. Estimation of phase-volume fractions from
tomographic measurements in two-phase systems. Advances in Water Resources.
Vol.22(6):577-584.

59. Somma, F., V. Clausnitzer, and J.W. Hopmans. 1998. Modeling of transient three-
dimensional soil water and solute transport with root growth and water and nutrient uptake. Plant and Soil. 202:281-293.

58. Chen, J., J.W. Hopmans and M.E. Grismer. 1999. Parameter estimation of two-fluid capillary pressure-saturation and permeability functions. Advances in Water Resources 22(5):479-493.

57. Clausnitzer, V., J.W. Hopmans, and J.L. Starr. 1998. Analysis of parameter estimation for infiltration models. Soil Sci. Soc. Amer. J. Vol. 62(6):1477-1487.

56. Hopmans, J.W., M.E. Grismer, J. Chen and Y.P. Liu. 1998. Parameter estimation of two- fluid capillary pressure-saturation and permeability functions. EPA Final Report. 86 pages. Also published on web:http://www.epa.gov/ada/reports.html.

55. Parlange, M.B. A.T. Cahill, D.R. Nielsen, J.W. Hopmans and O. Wendroth. 1998. Review of heat and water movement in field soils. Soil & Tillage Research 47(1-2) 5-10.

54. Simunek, J., M.Th. van Genuchten, M.M. Gribb, and J.W. Hopmans. 1998. Parameter estimation of unsaturated soil hydraulic properties from transient flow processes. Soil and Tillage Research 47(1-2):27-36.

53. Essert, S. and J.W. Hopmans. 1998. Combined tensiometer-solution sampling probe. Soil and Tillage Research 45(3-4):299-309.

52. Inoue, M., J. Simunek, J.W. Hopmans, and V. Clausnitzer. 1998. In-situ estimation of soil hydraulic properties using a multistep soil-water extraction technique. Water Resources Research 34(5):1035-1050.

51. Liu, Y.P., J.W. Hopmans, M.E. Grismer, and J.Y. Chen. 1998. Direct estimation of air-oil and oil-water capillary pressure and permeability relations from multi-step outflow experiments. J. Contaminant Hydrology 32(3-4):223-245.

50. Kosugi, K., and J.W. Hopmans. 1998. Scaling water retention curves for soils with lognormal por size distribution. Soil Sci. Soc. Amer. J. Vo. 62(6):1496-1505.

49. Hopmans, J.W., V. Clausnitzer, K.I. Kosugi, D.R. Nielsen and F. Somma. 1997. Vadose Zone measurements and modeling. Scientia Agricola: 22-38. Volume 54, June issue

48. Frueh, W.T. and J.W. Hopmans. 1997. TDR calibration of a multilevel probe in gravely soils. Soil Science. 162(8):554-565.

47. Koumanov, K. S., J.W. Hopmans, L.J. Schwankl, L. Andreu, and A. Tuli. 1997. Application efficiency of micro-sprinkler irrigation of almond trees. Agricultural Water Management 34:247-263.

46. Andreu, L., J.W. Hopmans and L.J. Schwankl. 1997. Spatial and temporal distribution of soil water balance for a drip-irrigated almond tree. Agricultural Water Management 35:123- 146

45. Heeraman, D.A., J.W. Hopmans, and V. Clausnitzer. 1997. Three-dimensional imaging of plant roots in situ with X-ray computed tomography. Plant and Soil 183:167-179.

44. Chen, Y., J. W. Hopmans, and G. E. Fogg. 1995. Sampling design for soil moisture measurements in small field trials. Soil Sci. 159(3):155-161.

43. Hopmans, J.W., and J.N.M. Stricker. 1989. Application of scaling techniques at a
watershed scale. IN: Land qualities in space and time. J. Bouma and A.K. Bregt (Eds.), Pudoc, Wageningen.

42. Anderson, S. E. and J. W. Hopmans. 1994. Editors. Tomography of soil water root processes. Special Publication Number 36, Soil Science Society of America.

41. Bali, K., M.E. Grismer and J. W. Hopmans. 1996. Outflow methods for evaluating the soil hydraulic relationships between NAPL pressure data in porous media. IN: Volatile Organic Compounds in the Environment. (Wungeng Wang, Jerald L. Schnoor and Jon Doi , eds.), ASTM STP 1261: 105-118.

40. Hopmans, J. W., J.C. van Dam, S.O. Eching and J. N. M. Stricker. 1994. Parameter estimation of soil hydraulic functions using inverse modeling of transient outflow experiments. In: Trends of Hydrology 1:217-242

39. Eching, S.O., J.W. Hopmans, and O. Wendroth. 1994. Unsaturated hydraulic conductivity from transient multistep outflow and soil water pressure data. Soil Sci. Soc. Amer. J. 157(3):687-695

38. Hopmans, J.W. 1994. Review: Water Flow in Soils by T. Miyazaki. Soil Science Vol 157(4):264-265.

37. Eching, S. O., J. W. Hopmans and W. W. Wallender. 1994. Estimation of in-situ unsaturated soil hydraulic functions from scaled cumulative drainage data. Water Resources Research 30(8):2387-2394

36. Hopmans, J. W., M. Cislerova and T. Vogel. 1994. X-ray tomography of soil properties. In: Tomography of soil-water root processes. Special Publication 36, Soil Science Society of America, pp. 17-28.

35. Eching, S.O., J.W. Hopmans, W.W. Wallender, J.L. MacIntyre, and D. Peters. 1994. Estimation of local and regional components of drain flow from an irrigated field. Irrig. Sci. 15:153-157

34. Clausnitzer, V. and J. W. Hopmans. 1994. Transient three-dimensional modeling of soil water flow and root growth. Plant and Soil 164(2):299-314.

33. Wendroth, O., W. Ehlers, J.W. Hopmans, H. Kage, J. Halbertsma, and J.N.M. Wosten. 1993. Re-evaluation of the evaporation method for determination of hydraulic functions in unsaturated soil. Soil Sci. Soc. Amer. J. 57:1436-1443.

32. Kamgar, A.A., J.W. Hopmans, W.W. Wallender and O. Wendroth. 1993. On plot size and sample number for neutron probe measurements in small field trials. Soil Sci. Vol. 156(4):213-224.

31. Childs, J. L., W. W. Wallender, and J. W. Hopmans. 1993. Spatial and seasonal variation of furrow infiltration. J. of Irrigation and Drainage Eng. Amer. Soc. Civil. Eng. 119(1):74-90.

30. Toorman, A. F., J. W. Hopmans, and W. W. Wallender. 1993. Selenium transport modeling in Kesterson Reservoir. Modeling of Geo-Biosphere Processes 1:229-252.

29. Shepard, S.G., W.W. Wallender, and J.W. Hopmans. 1993. One-point method for estimating furrow infiltration. Trans. Amer. Soc. Agric. Eng. Vol 36(2):395-404.

28. S.O. Eching, and J.W. Hopmans. 1993. Optimization of hydraulic function from transient outflow and soil water pressure data. Soil Sci. Soc. Amer. J. 57:1167-1175.

27. Hopmans, J. W., T. Vogel, and P. D. Koblik. 1992. X-ray tomography of soil water distribution in one-step outflow experiments. Soil Sci. Soc. Amer. J. 56(2):355-362.

26. Vogel, T. and J. W. Hopmans. 1992. Two-dimensional analysis of furrow irrigation. J. of Irrigation and Drainage Eng. Amer. Soc. Civil. Eng. 118(5):791-806.

25. Dasberg, S. and J. W. Hopmans. 1992. Time domain reflectometry calibration for uniformly and nonuniformly wetted sandy and clayey loam soils. Soil Sci. Soc. Amer. J. 56(5):1341-1345.

24. Hopmans J. W., L. J. Schwankl, and S. R. Grattan. 1992. Water conditioners fail to improve infiltration or prevent clogging. California Agriculture 46(6):22-25.

23. Paw U, K. T. and J. W. Hopmans. 1991. Review of: Flow and transport in the natural environment: Advances and applications. Steffen and Denmead (eds.). Agricultural and Forest Meteorology 53(1 2):161-163.

22. Hopmans, J. W., K. C. Roy, and W. W. Wallender. 1991. Irrigation water management and soil water hysteresis—A computer modeling study with stochastic soil hydraulic properties. Transactions of Amer. Soc. of Agricultural. Eng. 34(2):449-459.

21. Vogel, T., M. Cislerova, and J. W. Hopmans. 1991. Porous media with linearly variable soil hydraulic properties. Water Resources Research 27(10):2735-2741.

20. Clausnitzer, V., J. W. Hopmans, and D. R. Nielsen. 1991. Simultaneous scaling of soil water retention and hydraulic conductivity curves. Water Resources Research 28(1):19-31.

19. Hopmans, J. W., J. MacIntyre, and R. J. Southard. 1990. Water quality and subsurface soil variabilities affect infiltration. California Agriculture 44(3):10-12. May-June.

18. Hopmans, J. W. 1990. Stochastic description of field-measured infiltration data. Transactions of American Society of Agricultural Engineers 32(6):1987-1993.

17. Hopmans, J. W. and J. N. M. Stricker. 1989. Stochastic analysis of soil water regime in a watershed. Journal of Hydrology 105:57-84.

16. Van Ommen, H. C., J. W. Hopmans, and S. E. A. T. M. Van der Zee. 1989. Prediction of solute breakthrough from scaled soil physical properties. Journal of Hydrology 105:263-273.

15. Hopmans, J. W., H. Schukking, and P. J. J. F. Torfs. 1988. Two-dimensional steady state unsaturated water flow in heterogeneous soils with autocorrelated soil hydraulic properties. Water Resources Research 24(12):2005-2017

14. Hopmans, J. W. and E. Guttierez-Rave. 1988. Calibration of a root water uptake model in spatially variable soils. Journal of Hydrology 103:53-65.

13. Hopmans, J. W. 1988. Treatment of spatially variable groundwater levels in one-dimensional stochastic unsaturated water-flow modeling. Agricultural Water Management 15:19-36.

12. Hopmans, J. W. and C. H. van Immerzeel. 1988. Variation in evapotranspiration and capillary rise with changing soil profile characteristics. Agricultural Water Management 13:297-305.

11. Hogarth, W. L., J. W. Hopmans, J.-Y. Parlange, and R. Haverkamp. 1988. Application of a simple soil-water hysteresis model. Journal of Hydrology 98:21-29.

10. Adriaanse, P. I. and J. W. Hopmans. 1988. Mogelijkheden en beperkingen by het gebruik van gebiedsrepresentatieve bodemeenheden en grondwaterstrandsverlopen voor modelonderzoek. Cultuurtechnisch Tijdschrift 27(4):243-251.

9. Hopmans, J. W. 1987. A comparison of various methods of scale soil hydraulic properties. Journal of Hydrology 93:241-256.

8. Hopmans, J. W. and B. Overmars. 1986. Presentation and application of analytical model to describe soil hydraulic properties. Journal of Hydrology 87:135-143.

7. Dane, J. H., R. B. Reed and J. W. Hopmans. 1986. Estimating soil parameters and sample size by bootstrapping. Soil Science Society of America Journal 50:283-287.

6. Hopmans, J. W. and J. H. Dane. 1986. Calibration of a dual-energy gamma radiation system for multiple point measurements in a soil. Water Resources Research 22:1109-1114.

5. Hopmans, J. W. and J. H. Dane. 1986. Thermal conductivity of two porous media as a function of water content, temperature, and density. Soil Science 142:187-195.

4. Hopmans, J. W. and J. H. Dane. 1986. Temperature dependence of soil hydraulic
properties. Soil Science Society of America Journal 50:4-9.

3. Hopmans, J. W. and J. H. Dane. 1986. Temperature dependence of soil water retention curves. Soil Science Society of America Journal 50:562-567.

2. Hopmans, J. W. and J. H. Dane. 1986. Combined effect of hysteresis and temperature on soil-water movement. Journal of Hydrology 83:161-171.

1. Hopmans, J. W. and J. H. Dane. 1985. Effect of temperature-dependent hydraulic properties on soil water movement. Soil Science Society of America Journal 49:51-59.