The Effect of Fertilization on Time Domain Reflectometry Probe Measurement Accuracy in the Field Experiment in Slovakia-Reference-Cited by-同舟云学术

The Effect of Fertilization on Time Domain Reflectometry Probe Measurement Accuracy in the Field Experiment in Slovakia

Published:2020-08-27 Issue:3 Volume:23 Page:144-149
ISSN:1338-5267
Container-title:Acta Technologica Agriculturae
language:en
Short-container-title:

Author:

Toková Lucia¹,Igaz Dušan¹,Aydin Elena¹,Čimo Ján¹,Horák Ján¹

Affiliation:

1. Slovak University of Agriculture in Nitra , Slovakia

Abstract

Abstract The paper presents evaluation of the calibration method using side-by-side direct gravimetric and indirect time domain reflectometry (TDR) for soil moisture measurements to improve TDR measurement accuracy. Measurements were carried out at the experimental site Dolná Malanta (Slovakia) in 2017. Two non-fertilized treatments – without biochar (B0 + N0) and with biochar at 20 t·ha−1 (B20 + N0) – and two fertilized treatments – with biochar at 20 t·ha−1 and N fertilizer at dosages of 160 kg·ha−1 (B20 + N160) and 240 kg·ha−1 (B20 + N240) – were used in this study. The study also investigates the relationship between both used methods of soil water content determination. A strong correlation between both methods was observed. In case of (B0 + N0); (B20 + N0); (B20 + N160); and (B20 + N240), it was 0.93; 0.97; 0.97; and 0.98, respectively. However, it is assumed that the TDR probe may show errors in the results without prior calibration. It was observed that the accuracy of TDR device was lower for fertilized treatments in contrast to the gravimetric method and non-fertilized treatments. It is assumed that the higher measurement inaccuracy might be increased by salt concentration in the soil as a result of applied N fertilizer.

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Waste Management and Disposal,Agronomy and Crop Science

Link

https://www.sciendo.com/pdf/10.2478/ata-2020-0023

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