1. Perry CD, Dukes MD, Harrison KA (2004) Effects of variable-rate sprinkler cycling on irrigation uniformity. 2004 ASAE annual meeting. Am Soc Agric Biol Eng
2. Farahani HJ, Buchleiter GW (2004) Temporal stability of soil electrical conductivity in irrigated sandy fields in Colorado. Trans ASAE 47(1):79
3. Zhang Z (2004) Investigation of wireless sensor networks for precision agriculture. 2004 ASAE Annual Meeting. Am Soc Agric Biol Eng
4. Drummond PE, Christy CD, Lund ED (2000) Using an automated penetrometer and soil EC probe to characterize the rooting zone. In: Proceedings of the 5th international conference on precision agriculture, Bloomington, Minnesota, USA, 16–19 July, 2000. Am Soc Agron
5. Jabro JD, et al (2006) Characterization of spatial variability of soil electrical conductivity and cone index using coulter and penetrometer-type sensors. Soil Sci 171.8:627–637