title: Field performance of nine soil water content sensors on a sandy loam soil in new brunswick, maritime region, Canada.
abstract: An in situ field test on nine commonly-used soil water sensors was carried out in a sandy loam soil located in the Potato Research Center, Fredericton, NB (Canada) using the gravimetric method as a reference. The results showed that among the tested sensors, regardless of installation depths and soil water regimes, CS615, Trase, and Troxler performed the best with the factory calibrations, with a relative root mean square error (RRMSE) of 15.78, 16.93, and 17.65%, and a r(2) of 0.75, 0.77, and 0.65, respectively. TRIME, Moisture Point (MP917), and Gopher performed slightly worse with the factory calibrations, with a RRMSE of 45.76, 26.57, and 20.41%, and a r(2) of 0.65, 0.72, and 0.78, respectively, while the Gypsum, WaterMark, and Netafim showed a frequent need for calibration in the application in this region.
authors.affiliation: Potato Research Centre, 850 Lincoln Road, P.O. Box 20280. Agriculture and Agri-Food Canada, Fredericton, New Brunswick, Canada; E-Mails:  chowl@agr.gc.ca  (L.C.);  reesh@agr.gc.ca  (H.W.R.);  monteithj@agr.gc.ca  (J.M.);  lionels@agr.gc.ca  (L.S.).
authors.forename: Lien
authors.initials: L
authors.lastname: Chow
authors.forename: Zisheng
authors.initials: Z
authors.lastname: Xing
authors.forename: Herb W
authors.initials: HW
authors.lastname: Rees
authors.forename: Fanrui
authors.initials: F
authors.lastname: Meng
authors.forename: John
authors.initials: J
authors.lastname: Monteith
authors.forename: Lionel
authors.initials: L
authors.lastname: Stevens