CALIBRATING TMS-4 SENSORS FOR CONTINUOUS MONITORING OF SOIL WATER CONTENT AND ASSESSING EFFECTS OF COMPOST AMENDMENT ON SENSOR PERFORMANCE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F23%3A96555" target="_blank" >RIV/60460709:41210/23:96555 - isvavai.cz</a>

Výsledek na webu

<a href="https://icefsss-2023.com/" target="_blank" >https://icefsss-2023.com/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CALIBRATING TMS-4 SENSORS FOR CONTINUOUS MONITORING OF SOIL WATER CONTENT AND ASSESSING EFFECTS OF COMPOST AMENDMENT ON SENSOR PERFORMANCE

Popis výsledku v původním jazyce

Continuous monitoring of soil water content (SWC) using automated sensors is widely employed for research and practice. Promising among these sensors are the TMS-4 sensors by Tomst Inc. due to their convenience, independence, long battery life, and affordability. They measure SWC in surface layer (14 cm), soil temperature and air temperature (1 and 15 cm above the soil surface), making them suitable for monitoring microclimate changes induced e.g. by mulching. However sensor’s accuracy and precision can be affected by the sensor-to-sensor differences or by various soil conditions including installation mistakes. Aim of this study was to carry out the individual sensor calibration for soil of research locality in Velké Hostěrádky in order i) to improve the precision of the measurements compared to factory calibration; ii) to evaluate the sensor precision by using four brand new sensors; iii) to evaluate the sensor accuracy affected by organic matter (compost) added to the soil. In addition, obtained calibration equations were used to evaluate field measurement at the locality over 8 months. Soil was repacked into calibration container to achieve a target dry bulk density of 1.37 g/cm3, matching the natural field value, in prepared SWC levels from 0 % to 35 %. Real SWC and BD were determined by gravimetric method (in 5 repetitions for each SWC). Results showed significant differences between factory and individual calibration. While factory calibration was based on quadratic equations, we found logarithmic equations more reliable. One of the four tested sensors performed differently from the others. Finally, compost admixture (equivalent of 20 t/ha) has influence on sensor performance. TMS-4 signal has significantly lower values for the soil amended by compost, especially in the dry range. In conclusion, TMS-4 sensors are recommended but should be used with an adequate number of repetitions and tested before field application.

Název v anglickém jazyce

CALIBRATING TMS-4 SENSORS FOR CONTINUOUS MONITORING OF SOIL WATER CONTENT AND ASSESSING EFFECTS OF COMPOST AMENDMENT ON SENSOR PERFORMANCE

Popis výsledku anglicky

Continuous monitoring of soil water content (SWC) using automated sensors is widely employed for research and practice. Promising among these sensors are the TMS-4 sensors by Tomst Inc. due to their convenience, independence, long battery life, and affordability. They measure SWC in surface layer (14 cm), soil temperature and air temperature (1 and 15 cm above the soil surface), making them suitable for monitoring microclimate changes induced e.g. by mulching. However sensor’s accuracy and precision can be affected by the sensor-to-sensor differences or by various soil conditions including installation mistakes. Aim of this study was to carry out the individual sensor calibration for soil of research locality in Velké Hostěrádky in order i) to improve the precision of the measurements compared to factory calibration; ii) to evaluate the sensor precision by using four brand new sensors; iii) to evaluate the sensor accuracy affected by organic matter (compost) added to the soil. In addition, obtained calibration equations were used to evaluate field measurement at the locality over 8 months. Soil was repacked into calibration container to achieve a target dry bulk density of 1.37 g/cm3, matching the natural field value, in prepared SWC levels from 0 % to 35 %. Real SWC and BD were determined by gravimetric method (in 5 repetitions for each SWC). Results showed significant differences between factory and individual calibration. While factory calibration was based on quadratic equations, we found logarithmic equations more reliable. One of the four tested sensors performed differently from the others. Finally, compost admixture (equivalent of 20 t/ha) has influence on sensor performance. TMS-4 signal has significantly lower values for the soil amended by compost, especially in the dry range. In conclusion, TMS-4 sensors are recommended but should be used with an adequate number of repetitions and tested before field application.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů