Assessment of spatial and temporal variability in soil moisture using multi-length TDR probes to calibrate Aquaflex sensors

Kc, Birendra; Chau, Henry Wai; Mohssen, Magdy A. W.; Cameron, Keith; Safa, Majeed; McIndoe, Ian; Rutter, Helen; Dark, Andrew; Lee, Mina; Pandey, Vishnu Prasad; Schultz, Bart; Prasad, Krishna

doi:10.1007/s00271-021-00747-x

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…N and S represent the ‘north’ and ‘south’ blocks, respectively. Source : KC, Chau, Mohssen, Cameron, Safa (2021)…”

Section: Methodsmentioning

confidence: 99%

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Assessing effective pasture root depth for irrigation scheduling by water balance and soil moisture monitoring

Schultz

Mohssen³

et al. 2022

Irrigation and Drainage

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The ‘effective’ root depth of perennial ryegrass used for irrigation scheduling has substantial implications when estimating irrigation requirements. This study included field measurements of 20 percolation lysimeters with diameters and heights of 500 and 900 mm, respectively, installed on the Lincoln University Dairy Farm, Christchurch, New Zealand, to estimate actual evapotranspiration (ETa) based on water balance analysis for three soil depths: 500, 600 and 700 mm. Reference evapotranspiration (ETr) was estimated based on the CropWat 8 model. Perennial ryegrass height (h cm) was measured for each lysimeter. Among the three soil depths, 500 mm produced the highest regression coefficient for the crop coefficient (Kc = ETa/ETr) and h relationship. The results indicate the need to consider a 500 mm root depth to estimate irrigation requirements on this farm to achieve optimal water productivity. A noticeable fluctuation in daily soil water content for the top 500 mm soil profile, measured in time domain reflectometry probes and with an Aquaflex soil moisture sensor, also reinforces the earlier statement.

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“…N and S represent the ‘north’ and ‘south’ blocks, respectively. Source : KC, Chau, Mohssen, Cameron, Safa (2021)…”

Section: Methodsmentioning

confidence: 99%

“…Paddock N7 has 20 percolation lysimeters installed for measuring drainage flow (KC, Chau, Mohssen, Cameron, Safa, et al, 2021). The lysimeters are installed in two groups, with 10 in each group, to address spatial variability in the soil moisture.…”

Section: Methodsmentioning

confidence: 99%

Assessing effective pasture root depth for irrigation scheduling by water balance and soil moisture monitoring

Schultz

Mohssen³

et al. 2022

Irrigation and Drainage

Self Cite

View full text Add to dashboard Cite

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The effect of soil porosity size distribution on integral energy content of water in different moisture slopes

Dai

2023

Water Supply

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The water required by the plant is provided through the porous environment of the soil around the root. Therefore, indicators such as soil texture and effective porosity have been defined to measure the amount of water available to the plant. The pore size determines water energy and the plant's ability to absorb moisture, which is evaluated in this article. Multivariate regression analysis between the integral energy of water in different ranges of humidity as the dependent variable and the indices of soil pore size distribution as the independent variable has been investigated. Due to the fact that none of the indices of the pore size distribution curve have a significant relationship with the integral energy value of water in the permanent wilting point, therefore, it was not possible to estimate this index using the indices of the pore size distribution curve. The results showed that the elongation index of soil pore size distribution curve is the only factor determining the amount of integral energy of water in different soil water contents.

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Assessment of spatial and temporal variability in soil moisture using multi-length TDR probes to calibrate Aquaflex sensors

Cited by 2 publications

References 27 publications

Assessing effective pasture root depth for irrigation scheduling by water balance and soil moisture monitoring

Assessing effective pasture root depth for irrigation scheduling by water balance and soil moisture monitoring

The effect of soil porosity size distribution on integral energy content of water in different moisture slopes

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