Special issue: improving irrigation management across the Ogallala aquifer, USA

Andales, Allan A.; Rudnick, Daran R.; Chávez, José L.

doi:10.1007/s00271-020-00704-0

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Later, the reference evapotranspiration was multiplied by crop coefficients to achieve crop evapotranspiration. The general equation of soil water balance is presented as follows [34]:…”

Section: Irrigation Schedulingmentioning

confidence: 99%

“…where Dc is the soil moisture deficit (net irrigation requirement) in the root-zone of plant for the current day, Dp is the soil moisture deficit on the previous day, ETc is the crop evapotranspiration rate for the current day, P is the gross precipitation for the current day, Irr is the irrigation amount infiltrated into the soil for the current day, U is the upflux of shallow groundwater into the root zone, SRO is the surface runoff, and DP is the deep percolation or drainage. However, in our study, we used Equation (3) [34], which is the modified version of the soil water balance equation. In our experimental field, the groundwater level was not shallow enough to contribute to the root zone water, and there was no deep percolation or surface runoff due to the use of drip irrigation systems.…”

Section: Irrigation Schedulingmentioning

confidence: 99%

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Development of an IoT-Based Precision Irrigation System for Tomato Production from Indoor Seedling Germination to Outdoor Field Production

Seyar

Ahamed

2023

Applied Sciences

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Proper irrigation management, especially for tomatoes that are sensitive to water, is the key to ensuring sustainable tomato production. Using a low-cost sensor coupled with IoT technology could help to achieve precise control of the moisture content in the plant root-zone soil and apply water on demand with minimum human intervention. An IoT-based precision irrigation system was developed for growing Momotaro tomato seedlings inside a dark chamber. Four irrigation thresholds, 5%, 8%, 12%, and 15%, and two irrigation systems, surface and subsurface drip irrigation, were compared to assess which threshold and irrigation system referred the ideal tomato seedling growth. As a result, the 12% soil moisture threshold applied through the subsurface drip irrigation system significantly (p < 0.05) increased tomato seedling growth in soil composed of a main blend of peat moss, vermiculite, and perlite. Furthermore, in two repeated experiments, a subsurface drip irrigation system with 0.86 distribution uniformity used 10% less water than the surface drip irrigation system. The produced tomato seedlings were transplanted to open fields for further assessment. A low-power wide area networking (LoRaWAN) protocol was developed with remote monitoring and controlling capability for irrigation management. Two irrigation systems, including surface and subsurface drip irrigations, were used to compare which system resulted in higher tomato yields. The results showed that the subsurface drip irrigation system with 0.74 distribution uniformity produced 1243 g/plant, while each plant produced 1061 g in the surface drip irrigation system treatment. The results also indicated that the LoRaWAN-based subsurface drip irrigation system was suitable under outdoor conditions with easy operation and robust controlling capability for tomato production.

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“…Later, the reference evapotranspiration was multiplied by crop coefficients to achieve crop evapotranspiration. The general equation of soil water balance is presented as follows [34]:…”

Section: Irrigation Schedulingmentioning

confidence: 99%

Section: Irrigation Schedulingmentioning

confidence: 99%