Evaluation of default, soil-specific, and clay content correction calibration functions for dielectric sensors in soils with differing properties

Pečan, Urša (avtor), Kastelec, Damijana (avtor), Pintar, Marina (avtor)

Correct soil water content measurement is important for various environmental and agricultural applications. The aim of thisstudy was to evaluate the performance of two commercially available dielectric sensors, the SM150T (Delta-T Devices) and TRIME-Pico 32(IMKO). We evaluated the manufacturer’s calibration functions and the two-point calibration function recommended by Delta-T Devices.The coefficients of the two-point calibration showed a statistically significant dependence on clay content. Because the soils testedcontained a wide range of clay contents, a clay content correction function was developed. Soil-specific calibration functions were alsodeveloped. In general, measurement errors were the largest when the manufacturer’s calibration was used, but were smaller for the SM150T[root mean square error (RMSE) of 0.011 to0.051m3m−3] compared to the TRIME-Pico 32 (RMSE of 0.030 to0.060m3m−3). The errorsdecreased after applying the clay content correction function for TRIME-Pico 32. For both sensor types, the two-point calibration reducedthe errors, and the soil-specific calibration yielded the lowest error rates.

• Jezik: Angleški jezik
• Ključne besede: soil water, measurements, soil properties, dielectric sensors, calibration
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 22.03.2022
• Leto izida: 2022
• Št. strani: 11 str.
• Številčenje: Vol. 148, iss. 6 (04022016)
• PID: 20.500.12556/RUL-135668
• UDK: 631.4
• ISSN pri članku: 0733-9437
• DOI: 10.1061/(ASCE)IR.1943-4774.0001677
• COBISS.SI-ID: 102113795
• Datum objave v RUL: 24.03.2022

Gradivo je del revije

• Naslov: Journal of irrigation and drainage engineering
• Skrajšan naslov: J. irrig. drain. eng.
• Založnik: American Society of Civil Engineers
• ISSN: 0733-9437
• COBISS.SI-ID: 6405895

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 22.03.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: voda v tleh, vsebnost vode v tleh, lastnosti tal, meritve, dielektrični senzorji, kalibracija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P4-0085
• Naslov: Agroekosistemi

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Ministry of Education, Science and Sport, Republic of Slovenia; grant to Ph.D. Student