A tensiometer measures the force with which water is held in the soil by the soil particles. This force, referred to as soil suction, tension, or potential, indicates how tightly the water is bound in the soil, and how much energy must be exerted by plant roots to remove and use the water. The basic components of a tensiometer include a porous ceramic cup, a plastic body tube, and a vacuum gauge. The ceramic cup is placed in good hydraulic contact with the soil and allows transfer of water into and out of the tensiometer body according to the tension in the soil. The vacuum inside the tensiometer body equilibrates with the soil water tension, and the dial gauge provides a direct readout of the tension.
Jetfill Tensiometer Features
Part number and Description
Bagarello, V., Iovino, M. and Tusa, G. 2000, ‘Factors Affecting Measurement of the Near-Saturated Soil Hydraulic Conductivity‘,
Soil Science Society of America Journal, vol. 64, no.4, pp. 1203-1210.
Chen, C. and Payne, W.A. 2001, ‘Measured and Modeled Unsaturated Hydraulic Conductivity of a Walla Walla Silt Loam’,
Soil Science Society of America Journal, vol. 65,
Darusman, A.H.K., Stone, L.R., Spurgeon, W.E. and Lamm, F.R. 1997, ‘Water Flux Below the Root Zone vs. Irrigation Amount in Drip-Irrigated Corn‘,
Agronomy Journal, vol. 89, pp. 375-379.
Germann, P., Helbling, A. and Vadilonga, T. 2007, ‘Rivulet Approach to Rates of PreferentialInfiltration‘,
Vadose Zone Journal, vol. 6, pp. 207-220.
Lenhard, R.J. and Meakin, P. 2007, ‘Water Behavior in Layered Porous Media with Discrete Flow Channels: Results of a Large-Scale Experiment‘,
Vadose Zone Journal, vol. 6, pp. 458-470.
Lowery, B., Datiri, B.C. and Andraski, B.J. 1986, ‘An Electrical Readout System for Tensiometers‘,
Soil Science Society of America Journal, vol. 50, no. 2, pp. 494-496.
Moroizumi, T. and Horino, H. 2004, ‘Tillage Effects on Subsurface Drainage‘, Soil Science
Society of America Journal, vol. 68, pp. 1138-1144.
Steinberg, S.L. and Poritz, D. 2005, ‘Measurement of Hydraulic Characteristics of Porous Media Used to Grow Plants in Microgravity‘, Soil Science Society of America Journal, vol. 69, pp. 301-310.
Sugita, F. and Nakane, K. 2007, ‘Combined Effects of Rainfall Patterns and Porous Media Properties on Nitrate Leaching‘, Vadose Zone Journal, vol. 6, pp. 548-553.
Toride, N., Inoue, M. and Leij, F.J. 2003, ‘Hydrodynamic Dispersion in an Unsaturated Dune Sand‘, Soil Science Society of America Journal, vol. 67, pp. 703-712.
Waddell, J.T., Gupta, S.C., Moncrief, J.F., Rosen, C.J. and Steele, D.D. 1999, ‘Irrigation and Nitrogen Management Effects on Potato Yield, Tuber Quality, and Nitrogen Uptake‘,
Agronomy Journal, vol. 91, pp. 991-997.