Response of the TDR sensor to moisture under different types of management of a
            typical Latosol in the Cerrado

Guimarães, Claudinei Martins; Costa, Carlos Alexandre Gomes; Carneiro, Leandro Flávio; Assunção, Hildeu Ferreira da

doi:10.5935/1806-6690.20190001

Cited by 2 publications

(6 citation statements)

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“…NT: No‐tillage; CLI: crop‐livestock integration; CT: conventional tillage. Font: Guimarães et al (2019).…”

Section: Methodsmentioning

confidence: 99%

θ = 0.4047 + 13.56 {normalθ}_{TDR}

where θ is the real volume soil moisture; and θ TDR is the volume soil moisture registered by TDR sensor.…”

Section: Methodsmentioning

confidence: 99%

“…Four repetitions of the soil moisture measurement were made, collected randomly within a radius of 1 m from each i point. This equipment was properly calibrated by Guimarães et al (2019) where θ is the real volume soil moisture; and θ TDR is the volume soil moisture registered by TDR sensor. Precipitation and reference evapotranspiration were obtained from an automatic meteorological station close the experiment.…”

Section: Sampling and Data Collectionmentioning

confidence: 99%

“…† SD, standard deviation; SEM, standard error of the mean; CV, coefficient of variation; n, sample size; SEM, mean standard error; NT, no-tillage; CLI, crop-livestock integration; CT, conventional tillage; A, 0-0.12 m; B, 0.12-0.24 m; C, 0.24-0.36 m. Means followed by the same letter on the line, do not differ statistically. Adapted fromGuimarães et al (2018aGuimarães et al ( , 2018bGuimarães et al ( , 2019.…”

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confidence: 99%

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Moisture Temporal Stability of a Typic Hapludox under Different Uses and Depths

et al. 2019

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Temporal stability shows that specific within‐field locations can represent average moisture values for a period of time, reducing efforts of collecting and measurement field observations. The objective of this study was to analyze the temporal stability of soil moisture within a Hapludox, typical of Cerrado, a unique Brazilian biome (similar to savanna), located in the southwestern state of Goiás. Instant readings of volumetric soil moisture were done biweekly from November 2013to February 2014, using a portable TDRSensor with rods of 0.12 m in length, at 0‐ to 0.12‐, from 0.12‐ to 0.24‐, and 0.24‐ to 0.36‐m soil depths. The TDR sensor data were corrected and calibrated by volumetric water content data obtained from gravity method and soil bulk density measurements. To quantify temporal stability, we used nonparametric methods: Spearman correlation coefficient, average relative difference, and temporal stability index. Temporal stability on the field scale differed between the three sites/systems. Average soil moisture can be accurately estimated at only one georeferenced point for each site/management system, reducing measurement effort in long‐term studies. Core Ideas Moisture temporal stability reduce cost of field measurements. It is essential to planning monitoring programs of hydrology and irrigation. Represent a valuable support for future researches related to soil water management.

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“…NT: No‐tillage; CLI: crop‐livestock integration; CT: conventional tillage. Font: Guimarães et al (2019).…”

Section: Methodsmentioning

confidence: 99%

θ = 0.4047 + 13.56 {normalθ}_{TDR}

where θ is the real volume soil moisture; and θ TDR is the volume soil moisture registered by TDR sensor.…”

Section: Methodsmentioning

confidence: 99%

Section: Sampling and Data Collectionmentioning

confidence: 99%

mentioning

confidence: 99%

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Moisture Temporal Stability of a Typic Hapludox under Different Uses and Depths

et al. 2019

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“…Esses modelos intitulados universais ao desconsiderarem variáveis físicas e químicas dos locais dos solos nos quais serão instalados e utilizados, acabam por alterar os valores estimados de θ, pois os conteúdos de matéria orgânica, a textura, bem como os atributos químicos que lhe são peculiares, tais como aqueles que são inerentes aos Latossolos caracterizados por deterem altos teores de óxido de ferro acabam constituindo fontes de erros na estimativa de θ a partir do sensor TDR (GUIMARÃES et al, 2019).…”

Section: Introductionunclassified

Calibração e estimativa da umidade no latossolo amarelo distrófico pela Time Domain Reflectometry na Amazônia

Moura¹,

Sousa

Nunes

et al. 2020

RBAI

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Response of the TDR sensor to moisture under different types of management of a typical Latosol in the Cerrado

Cited by 2 publications

References 2 publications

Moisture Temporal Stability of a Typic Hapludox under Different Uses and Depths

Moisture Temporal Stability of a Typic Hapludox under Different Uses and Depths

Calibração e estimativa da umidade no latossolo amarelo distrófico pela Time Domain Reflectometry na Amazônia

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