Aaltonen, J., and B. Olofsson. 2002. Direct current (DC) resistivity measure-ments in long-term groundwater monitoring programmes. Environ. Geol. (Berl.) 41:662-671.
Agus, F., D.K. Cassel, and D.P. Garrity. 1997. Soil-water and soil physical properties under contour hedgerow systems on sloping oxisols. Soil Tillage Res. 40:185-199. doi:10.1016/S0167-1987(96)01069-0
al Hagrey, S.A. 2007. Geophysical imaging of root-zone, trunk, and moisture heterogeneity. J. Exp. Bot. 58:839-854. doi:10.1093/jxb/erl237
al Hagrey, S.A., and T. Petersen. 2011. Numerical and experimental mapping of small root zones using optimized surface and borehole resistivity tomogra-phy. Geophysics 76:G25-G35.
Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. 1998. Crop evapotranspiration-Guidelines for computing crop water requirements. R.G. Allen, editor. FAO, Rome.
Alumbaugh, D.L., and G.A. Newman. 2000. Image appraisal for 2-D and 3-D electromagnetic inversion. Geophysics 65:1455-1467.
Amato, M., B. Basso, G. Celano, G. Bitella, G. Morelli, and R. Rossi. 2008. In situ detection of tree root distribution and biomass by multi-electrode resistivity imaging. Tree Physiol. 28:1441-1448.
Amato, M., G. Bitella, R. Rossi, J.A. Gómez, S. Lovelli, and J.J.F. Gomes. 2009. Multi-electrode 3D resistivity imaging of alfalfa root zone. Eur. J. Agron. 31:213-222. doi:10.1016/j.eja.2009.08.005
Amidu, S.A., and J.A. Dunbar. 2007. Geoelectric studies of seasonal weting and drying of a Texas vertisol. Vadose Zone J. 6:511-523. doi:10.2136/vzj2007.0005
Archie, G.E. 1942. The electrical resistivity log as an aid in determining some reservoir characteristics. Trans. Am. Inst. Min. Metall. Pet. Eng. 146:54-67.
Besson, A., I. Cousin, A. Samouëlian, H. Boizard, and G. Richard. 2004. Struc-tural heterogeneity of the soil tilled layer as characterized by 2D elec-trical resistivity surveying. Soil Tillage Res. 79:239-249. doi:10.1016/j.still.2004.07.012
Blome, M., H. Maurer, and S. Greenhalgh. 2011. Geoelectric experimental de-sign-Efficient acquisition and exploitation of complete pole-bipole data sets. Geophysics 76:F15-F26.
Carsel, R.F. and R.S. Parrish. 1988. Developing joint probability distributions of soil water retention characteristics. Water Resour. Res. 24: 755-769. doi:10.1029/WR024i005p00755
Celano, G., A.M. Palese, A. Ciucci, E. Martorella, N. Vignozzi, and C. Xiloyannis. 2011. Evaluation of soil water content in tilled and cover-cropped olive or-chards by the geoelectrical technique. Geoderma Corrected Proof. (in press).
Celano, G., A.M. Palese, A.C. Tuzio, D. Zuardi, L. Lazzari, C. Xilloyanis, and E. Martorella. 2010. Geo-electrical survey on the soil of an apricot orchard grown under semi-arid conditions. In: C. Xiloyannis, editor, XIVth IS on apri-cot breeding and culture. International Society for Horticultural Science, Leuven, Belgium.
Cousin, I., A. Besson, H. Bourennane, C. Pasquier, B. Nicoullaud, D. King, and G. Richard. 2009. From spatial-continuous electrical resistivity measurements to the soil hydraulic functioning at the field scale. C. R. Geosci. 341:859-867. doi:10.1016/j.crte.2009.07.011
Craswell, E.T., A. Sajjapongse, D.J.B. Howlett and A.J. Dowling.1997. Agrofor-estry in the management of sloping lands in Asia and the Pacific. Agrofor. Syst. 38:121-137. doi:10.1023/A:1005960612386
Curtis, A. 1999. Optimal experiment design: Cross-borehole tomographic exam-ples. Geophys. J. Int. 136:637-650. doi:10.1046/j.1365-246x.1999.00749.x
Danielsen, B.E., and T. Dahlin. 2010. Numerical modelling of resolution and sensitivity of ERT in horizontal boreholes. J. Appl. Geophys. 70:245-254. doi:10.1016/j.jappgeo.2010.01.005
Dercon, G., J. Deckers, J. Poesen, G. Govers, H. Sánchez, M. Ramírez, R. Vanegas, E. Tacuri, and G. Loaiza. 2006. Spatial variability in crop response under contour hedgerow systems in the Andes region of Ecuador. Soil Tillage Res. 86:15-26. doi:10.1016/j.still.2005.01.017
Dey, A., and H.F. Morrison. 1979. Resistivity modelling for arbitrarily shaped two-dimensional structures. Geophys. Prospect. 27:106-136. doi:10.1111/j.1365-2478.1979.tb00961.x
Essig, E.T., C. Corradini, R. Morbidelli, and R.S. Govindaraju. 2009. Infiltration and deep flow over sloping surfaces: Comparison of numerical and experi-mental results. J. Hydrol. 374:30-42. doi:10.1016/j.jhydrol.2009.05.017
Feddes, R.A., P. Kowalik, and H. Zaradny. 1978. Simulation of field water use and crop yield. Simulation monographs. PUDOC, Wageningen, the Neth-erlands.
Friedel, S. 2003. Resolution, stability and efficiency of resistivity tomography estimated from a generalized inverse approach. Geophys. J. Int. 153:305-316. doi:10.1046/j.1365-246X.2003.01890.x
Furman, A., T.P.A. Ferre, and A.W. Warrick. 2003. A sensitivity analysis of elec-trical resistivity tomography array types using analytical element modeling. Vadose Zone J. 2:416-423.
Garré, S., M. Javaux, J. Vanderborght, L. Pages, and H. Vereecken. 2011. Three-dimensional electrical resistivity tomography to monitor root zone water dynamics. Vadose Zone J. 10:412-424. doi:10.2136/vzj2010.0079
Günther, T. 2004. Inversion methods and resolution analysis for the 2D/3D reconstruction of resistivity structures from DC Measurements. Ph.D. diss. Univ. of Mining and Technol., Freiberg, Germany.
Günther, T., C. Rücker, and K. Spitzer. 2006. Three-dimensional modelling and inversion of DC resistivity data incorporating topography-II. Inversion. Geo-phys. J. Int. 166:506-517. doi:10.1111/j.1365-246X.2006.03011.x
Gutiérrez-Jurado, H.A., E.R. Vivoni, J.B.J. Harrison, and H. Guan. 2006. Ecohy-drology of root zone water fluxes and soil development in complex semi-arid rangelands. Hydrol. Processes 20:3289-3316. doi:10.1002/hyp.6333
Hairiah, K., M. Van Noordwijk, and G. Cadisch. 2000. Crop yield, C and N bal-ance of three types of cropping systems on an Ultisol in Northern Lampung. NJAS-Wageningen. J. Life Sci. 48:3-17.
Harr, R.D. 1977. Water flux in soil and subsoil on a steep forested slope. J. Hy-drol. 33:37-58. doi:10.1016/0022-1694(77)90097-X
Hornberger, G.M., P.F. Germann, and K.J. Beven. 1991. Throughflow and solute transport in an isolated sloping soil block in a forested catchment. J. Hydrol. 124:81-99. doi:10.1016/0022-1694(91)90007-5
Imo, M., and V.R. Timmer. 2000. Vector competition analysis of a Leucaena-maize alley cropping system in western Kenya. For. Ecol. Manage. 126:255-268. doi:10.1016/S0378-1127(99)00091-2
Jayawickreme, D.H., R.L. Van Dam, and D.W. Hyndman. 2010. Hydrological con-sequences of land-cover change: Quantifying the influence of plants on soil moisture with time-lapse electrical resistivity. Geophysics 75:WA43-WA50.
Kemna, A., J. Vanderborght, B. Kulessa, and H. Vereecken. 2002. Imaging and characterisation of subsurface solute transport using electrical resistivity tomography (ERT) and equivalent transport models. J. Hydrol. 267:125-146. doi:10.1016/S0022-1694(02)00145-2
Koestel, J., J. Vanderborght, M. Javaux, A. Kemna, A. Binley, and H. Vereecken. 2009. Non-invasive 3D transport characterization in a sandy soil using ERT I: Investigating the validity of ERT-derived transport parameters. Vadose Zone J. 8:711-722. doi:10.2136/vzj2008.0027
LaBrecque, D.J., M. Miletio, W. Daily, A. Ramirez, and E. Owen. 1996. The ef-fects of noise on Occam's inversion of resistivity tomography data. Geo-physics 61:538-548.
Lal, R. 1989. Agroforestry systems and soil surface management of a tropical alfisol. Agrofor. Syst. 8:97-111. doi:10.1007/BF00123115
Laloy, E., C. Roisin, M. Javaux, M. Vanclooster, and C.L. Bielders. 2011. Elec-trical resistivity in a structured agricultural loamy soil: Identification of the appropriate pedo-physical model and field application. Water Resour. Res.10:1023-1033.
Linde, N., A. Binley, A. Tryggvason, L.B. Pedersen, and A. Revil. 2006. Improved hydrogeophysical characterization using joint inversion of cross-hole elec-trical resistance and ground-penetrating radar traveltime data. Water Re-sour. Res. 42(12):W04410.
Loke, M.H., and R.D. Barker. 1996. Practical techniques for 3D resistivity surveys and data inversion. Geophys. Prospect. 44:499-523. doi:10.1111/j.1365-2478.1996.tb00162.x
Maurer, H., D.E. Boerner, and A. Curtis. 2001. Design strategies for electro-magnetic geophysical surveys. Inverse Probl. 17:189. doi:10.1088/0266-5611/17/1/501
Menke, W. 1989. Geophysical data analysis: Discrete inverse theory. Academic Press, New York.
Michot, D., Y. Benderitier, A. Dorigny, B. Nicoullaud, D. King, and A. Tabbagh. 2003. Spatial and temporal monitoring of soil water content with an irri-gated corn crop cover using surface electrical resistivity tomography. Water Resour. Res. 39: 1138-1158.
Michot, D., A. Dorigny, and Y. Benderitier. 2001. Determination of water flow direction and corn roots-induced drying in an irrigated Beauce CALCISOL, using electrical resistivity measurements. Comptes Rendus De L Acad-emie Des Sciences Serie Ii Fascicule a-Sciences De La Terre Et Des Planetes 332:29-36.
Morgan, R.P.C. 2004. Soil Erosion and Conservation. Wiley-Blackwell, New York.
Müller, K., J. Vanderborght, A. Englert, A. Kemna, J.A. Huisman, J. Rings, and H. Vereecken. 2010. Imaging and characterization of solute transport during two tracer tests in a shallow aquifer using electrical resistivity tomogra-phy and multilevel groundwater samplers. Water Resour. Res. 46:W03502. doi:10.1029/2008WR007595
Mushagalusa, G.N., J.-F. Ledent, and X. Draye. 2008. Shoot and root competi-tion in potato/maize intercropping: Effects on growth and yield. Environ. Exp. Bot. 64:180-188. doi:10.1016/j.envexpbot.2008.05.008
Nijland, W., M. van der Meijde, E.A. Addink, and S.M. de Jong. 2010. Detec-tion of soil moisture and vegetation water abstraction in a Mediterranean natural area using electrical resistivity tomography. Catena 81:209-216. doi:10.1016/j.catena.2010.03.005
Noel, M., and B. Xu. 1991. Archeological investigation by electrical resistivity to-mography: A preliminary study. Geophys. J. Int. 107:95-102. doi:10.1111/j.1365-246X.1991.tb01159.x
Oldenborger, G.A., and P.S. Routh. 2009. The point-spread function measure of resolution for the 3-D electrical resistivity experiment. Geophys. J. Int. 176:405-414. doi:10.1111/j.1365-246X.2008.04003.x
Pansak, W., G. Dercon, T. Hilger, T. Kongkaew, and G. Cadisch. 2007. 13C isoto-pic discrimination: A starting point for new insights in competition for nitro-gen and water under contour hedgerow systems in tropical mountainous regions. Plant Soil 298:175-189. doi:10.1007/s11104-007-9353-y
Raes, D., P. Steduto, T.C. Hsiao, and E. Fereres. 2009. Aquacrop-the FAO Crop Model to Simulate Yield Response to Water: Ii. Main Algorithms and Software Description. Agron. J. 101:438-447. doi:10.2134/agronj2008.0140s
Revil, A., and P.W.J. Glover. 1998. Nature of surface electrical conductivity in natural sands, sandstones, and clays. Geophys. Res. Lett. 25:691-694. doi:10.1029/98GL00296
Rossi, R., M. Amato, G. Bitella, R. Bochicchio, J.J. Ferreira Gomes, S. Lovelli, E. Martorella, and P. Favale. 2011. Electrical resistivity tomography as a non-destructive method for mapping root biomass in an orchard. Eur. J. Soil Sci. 62:206-215. doi:10.1111/j.1365-2389.2010.01329.x
Rücker, C., T. Günther, and K. Spitzer. 2006. Three-dimensional modelling and inversion of dc resistivity data incorporating topography-I. Modelling. Geo-phys. J. Int. 166:495-505. doi:10.1111/j.1365-246X.2006.03010.x
Šimůnek, J., M. Šejna, and M.T. van Genuchten. 1996. The Hydrus-2D software package for simulating water flow and solute transport in two-dimensional variably saturated media. Version 1.0. IGWMC-TPS-53. International Ground Water Modeling Center, Colorado School of Mines, Golden, CO.
Singha, K., and S.M. Gorelick. 2005. Saline tracer visualized with three-dimen-sional electrical resistivity tomography: Field-scale spatial moment analysis. Water Resour. Res. 41:W05023.
Spies, B.R. 1989. Depth of investigation in electromagnetic sounding methods. Geophysics 54:872-888.
Srayeddin, I., and C. Doussan. 2009. Estimation of the spatial variability of root water uptake of maize and sorghum at the field scale by electrical resistivity tomography. Plant Soil 319:185-207. doi:10.1007/s11104-008-9860-5
Steduto, P., T.C. Hsiao, D. Raes, and E. Fereres. 2009. AquaCrop-The FAO crop model to simulate yield response to water: I. Concepts and Underlying Prin-ciples. Agron. J. 101:426-437.
Stummer, P., H. Maurer, and A.G. Green. 2004. Experimental design: Electrical resistivity data sets that provide optimum subsurface information. Geo-physics 69:120-139.
Tang, Y. 2000. Manual on contour hedgerow intercropping technology. ICIMOD, Katmandu, Nepal.
Theil, H. 1971. Principles of econometrics. John Wiley and Sons, New York.
Turkelboom, F., J. Poesen, I. Ohler, K. Van Keer, S. Ongprasert, and K. Vlassak. 1997. Assessment of tillage erosion rates on steep slopes in northern Thai-land. Catena 29:29-44. doi:10.1016/S0341-8162(96)00063-X
van Genuchten, M.Th. 1980. A closed form equation for predicting the hy-draulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44:892-898. doi:10.2136/sssaj1980.03615995004400050002x
Vanderborght, J., A. Kemna, H. Hardelauf, and H. Vereecken. 2005. Potential of electrical resistivity tomography to infer aquifer transport characteristics from tracer studies: A synthetic case study. Water Resour. Res.41: W06013.
Waxman, M.H., and L.J.M. Smits. 1968. Electrical conductivities in oil-bearing shaly sands. Soc. Pet. Eng. J. 8:107.
Werban, U., S.A. al Hagrey, and W. Rabbel. 2008. Monitoring of root-zone water content in the laboratory by 2D geoelectrical tomography. J. Plant Nutr. Soil Sci. 171:927-935.
Wilkinson, P.B., J.E. Chambers, M. Lelliott, G.P. Wealthall, and R.D. Ogilvy. 2008. Extreme sensitivity of crosshole electrical resistivity tomography measure-ments to geometric errors. Geophys. J. Int. 173:49-62. doi:10.1111/j.1365-246X.2008.03725.x
Xu, B.W., and M. Noel. 1993. On the Completeness of Data Sets with Multielec-trode systems for electrical-resistivity survey. Geophys. Prospect. 41:791-801. doi:10.1111/j.1365-2478.1993.tb00885.x
Zenone, T., G. Morelli, M. Teobaldelli, F. Fischanger, M. Matieucci, M. Sordini, A. Armani, C. Ferre, T. Chitt and G. Seufert. 2008. Preliminary use of ground-penetrating radar and electrical resistivity tomography to study tree roots in pine forests and poplar plantations. Commonwealth Scientific and Indus-trial Research Organization, Collingwood, Australia.
