Boutraa,T., Akhkha,A., Alshoaibi,A and Atta,R 2011. Evaluation of the effectiveness of an automated irrigation system using wheat crops. Agriculture and Biology Journal of North America 2: 80-88.
Cardenas-Lailhacar,B., Dukes,M.D. 2009. Precision of soil moisture sensor irrigation controllers under field conditions. Agricultural Water Management 97: 666-672.
Campbell,G.S., Mulla,D.J. 1990. Measurement of soil water content and potential. Chapter 6 In Stewart B.A. and Nielsen D.R. (co-editors). Irrigation of Agricultural Crops. American Society of Agronomy. Madison, USA pp 127-142.
Charlesworth,P. 2005. Soil Water Monitoring, Irrigation Insights No. 1, Second Edition. Coelho E.F. and D. Or. 1996. Flow and uptake patterns affecting soil water sensor placement for drip irrigation management. Trans. ASAE 39(6):2007-2016.
Chow,L., Xing,Z., Rees,H.W. Meng,F and Monteith,J. 2009. Field performance of nine soil water content sensors on a sandy loam soil in new brunswick, maritime region, Canada. Sensors, 9: 9398-9413.
Gardner, W.R (1986), Water Content. In A. Klute (ed.) Method of Soil Analysis Part 1. 2 nd ed Agronomy 9: 493-544.
Hanson,R.B., Orloff,S., Pters, D. 2000. Monitoring soil moisture helps refine irrigation management. California Agriculture 54, 38-42.
Irrometer. 2010. Watermark Soil Moisture Sensor – Model 200SS. Specification Document. Irrometer company, Inc. P. O. Box 2424, Riverside, CA 92516. http://www. irrometer. com
Larson,G.F. 1985. Electrical sensor for measuring moisture in landscape and agricultural soils. U. S. Patent 4,531,087. Date of Patent: July 23, 1995.
Leib,B.G, Jabro,J.D and Mtthews,G.R. 2003. Field evaluation and performance comparison of soil moisture sensors. Soil Science 168, 396-408.
Leib,B.G. 1998. The 1998 survey of irrigation scheduling providers. The Washington Irrigator News letter, Washington State University, Prosser,WA.
Leib,B.G., Hattendorf,M., Elliott,T and Matthews,G. 2002. Adoption and of 1998.Agric.Water Manage. 55:105–120.Adaptation of Scientific Irrigation Scheduling: Trend from Washington, USA as of 1998.Agric.Water Manage. 55:105–120.
McCann,I.R., Kincaid,D.C and Wang,D. 1992 Operational characteristics of the Watermark model 200 soil water potential sensor for irrigation management. Applied Engr. in Agriculture 8(5):605-609. ASAE, 2950 Niles Rd.,St. Joseph, MI 49085
Nolz,R., Kammerer,G and Cepuder,P. 2012. Calibrating soil water potential sensors integrated into a wireless monitoring network. Agricultural Water Management. 116: 12– 20.
Prichard,T., Hanson,B. Schwankl,L., Verdegaal,P and Smith,R. 2004. (Draft publication) Deficit irrigation of quality winegrapes using micro-irrigation techniques. University of California Cooperative Extension, p. 91 (Revised April 2004)
SAS Institute. 2002. SAS/STAT User’s Guide for the Personal Computer, Version 8. 01. SAS Institute, Inc. , Cary,NC.
Spaans,E.J.A and Baker,J.M. 1992. Calibration of Watermark soil moisture sensors for soil matric potential and temperature. Plant and Soil143: 213-217
Thompson, R.B., Gallardo,M., Aguera, T., Valdez, L.C., Fernandez, M D. (2006), Evaluation of the watermark sensor for use with drip irrigated vegetable crops. Irriggation Science Journal. 24, 185–202.
Yoder,R.E., Johnson,D.L., Wilkerson, J.B and Yoder,D.C 1998. Soil water sensor performance. Appl. Eng. Agric. 14, 121-133.