Open AccessSensitivity of PR2 Capacitance Soil Moisture Meter for Irrigation Scheduling
Author(s) -
Olotu Yahaya,
Omoakhalen A.I,
Ososomi A.S.,
Gbalaja Mayowa,
Alhassan A.I,
Ayilaran C.I.
Publication year - 2021
Publication title -
indian journal of production and thermal engineering (ijpte)
Language(s) - English
Resource type - Journals
ISSN - 2582-8029
DOI - 10.54105/ijpte.b2007.081321
Subject(s) - water content , gravimetric analysis , capacitance , soil science , irrigation scheduling , environmental science , capacitance probe , irrigation , moisture , soil moisture sensor , soil water , materials science , geotechnical engineering , engineering , chemistry , agronomy , composite material , organic chemistry , electrode , biology
Accurate soil moisture content measurement is essential for designing a robust irrigation scheduling and integrated water resources management (I.W.R.M.). Capacitance-based sensors have widely been used to monitor soil moisture at different measuring depths coupled with continuous and instantaneous outputs. This study’s objective was to evaluate the PR2 capacitance moisture meter’s performance on mineral and organic soil water content. The outputs of PR2 in m3/m3 and vol.% were compared with gravimetrically measured soil moisture. The R.M.S.E. measurement at Site A at the first and second replicates increased from 0.49% to 0.67%. In contrast, the r2 value of 0.99 was obtained for the two replications when comparing the soil moisture content observed from gravimetric measurement and the automated outputs from the PR2 Probe soil monitor. The R.M.S.E. values were 0.48%, and 1.32% were estimated for the first and second replications at Site B. The result indicates that the PR2 Profile Probe could be a reliable alternative to other time-consuming, complex computer algorithms for accurate point measurement of soil moisture.