Sprinkler irrigation uniformity: Impact on the crop yield and water use efficiency

El-Wahed, Mohamed H. Abd; Medici, Marco; Lorenzini, Giulio

doi:10.1134/s1810232816010112

Cited by 17 publications

(4 citation statements)

References 24 publications

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“…For each input setting, the coefficient of uniformity (CU), distribution uniformity (DU), and coefficient of variation (CV) parameters were determined. The results showed higher CU values in all cases, increased by higher operating pressure (El-Wahed et al, 2016). Numerous authors (González Perea et al, 2014;Tomášik and Jobbágy, 2013) have also developed programs for assessing the quality of irrigation techniques resulting in spray uniformity coefficients after providing input values.…”

Section: Resultsmentioning

confidence: 99%

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Jobbágy

Michlian

Dačanin

et al. 2019

Acta Technologica Agriculturae

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Considering the global tendency in water saving, this research is focused on practical measurements of even distribution of water. The performance quality is determined by values of coefficients of distribution uniformity and non-uniformity given in percentages. Objects of investigation were belt irrigators with varying input conditions (seven pieces). Testing of hose-reel irrigators took place in Southern and Western Slovakia. Tests were carried out during irrigation of selected agricultural crops (potatoes, vegetables); in these areas, rainwater vessels were distributed at a spacing of 1 or 2 m, perpendicular to the direction of movement of the bracket or tripod with a gun sprinkler. The input conditions, such as machine specifications and weather conditions, were monitored and evaluated for all variants. The data were also analysed along with the linear model through statistical analysis software – one-way analysis of variance ANOVA. Considering the results, it is possible to conclude that there were recorded statistically significant differences for uniformity coefficients, depending not only on the site but also on the specific evaluation methodology (P > 0.05). If the input conditions (site, type of irrigator, sprinkler) were changed, the effect of dependence was demonstrated to a much greater extent (P <0.05, F = 7.08> Fcrit). The results of the non-uniformity coefficients confirmed the statistically significant differences not only in the sample sets of coefficients but also in the selection sets of conditions.

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Section: Resultsmentioning

confidence: 99%

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Jobbágy

Michlian

Dačanin

et al. 2019

Acta Technologica Agriculturae

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“…At different growth periods of wheat, crop height and canopy coverage are different, so it is necessary to select reasonable working pressure according to the height of different periods so that irrigation water is reasonably distributed in the crop water demand period (Abd El‐Wahed et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Effect of wheat crop height and canopy coverage on microsprinkling hose irrigation uniformity

Wang¹,

Wang²,

Rong³

et al. 2023

Irrigation and Drainage

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Crop shading affects irrigation uniformity and water distribution under microsprinkling hose irrigation (MHI). This study aims to ascertain how MHI distributes irrigation water under crop shading. Various crop heights and canopy coverages of wheat specimens were designed. The experiment was conducted under four working pressures (20, 24, 28 and 32 kPa). The irrigation water distribution of the MHI under crop shading was analysed under various crop heights and canopy coverages. The results showed that (1) the irrigation uniformity of MHI could reach approximately 50% while the planting row spacing of wheat was appropriate. Crop shading had little effect on irrigation performance. (2) During the jointing period, when the wheat height reached 0.4 m, intensive stems reduced the irrigation uniformity and spraying range of MHI. (3) The wheat height could reach 0.6–0.7 m in the maturing period. The uniformity was 25%–50%, which was far lower than the effect of irrigation during the jointing period. To obtain great irrigation performance and acceptable crop yield, it is important to select the proper pressure under the various crop heights and canopy coverages of wheat under MHI.

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“…Note that CU and DU give complementary information: Empirical evidence confirms that uniformity is increased when their values are closer (Ortiz et al, 2010). In addition, the CV (Equation ) can be computed as the standard deviation (

σ true)

of all catch can measurements divided by the average (Abd El‐Wahed et al, 2016).

CV goodbreak= \frac{σ}{\overset{true¯}{h}} 100

…”

Section: Methodsmentioning

confidence: 99%

Evaluation of new pivoting linear‐move precision irrigation machine

Szabó

Tamás

Kövesdi³

et al. 2023

Irrigation and Drainage

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Due to population growth, freshwater resources around the world are becoming increasingly scarce, and the water supply in agriculture has emerged as one of the limitations of food production. Variable‐rate irrigation (VRI), a type of precision irrigation, allows water‐efficient irrigation techniques to ensure an optimal water supply. The University of Debrecen, in collaboration with Magtár Kft., was the first in Hungary to develop a new laterally mobile irrigation machine equipped with VRI. The subject of our study was the testing of this system. According to the research, high and homogeneous irrigation uniformity was achieved in practice, with a Christiansen uniformity coefficient (CUc%) of 93 ± 2, distribution uniformity (DU%) of 88 ± 2 and coefficient of variation (CV) of 9 ± 2. Irrigation accuracy was also found to be satisfactory (mean absolute error 0.6 ± 0.1, mean bias error 0.2 ± 0.2, normalized root mean square error 8.6 ± 2), and only 1.4% ± 2% was overirrigated and 0.4% ± 0.3% underirrigated. In addition, the uniformity and accuracy of irrigation in different management zones along the pipeline were also investigated, and significant differences (p < 0.05) were found between irrigation water depths. Based on the above, a new laterally mobile irrigation machine equipped with VRI can be used to develop more uniform and accurate irrigation schedules in the future in arable fields as this is critical for water‐saving irrigation management.

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Sprinkler irrigation uniformity: Impact on the crop yield and water use efficiency

Cited by 17 publications

References 24 publications

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Application and Evaluation of Performance Quality of Hose-Reel Irrigation Machine

Effect of wheat crop height and canopy coverage on microsprinkling hose irrigation uniformity

Evaluation of new pivoting linear‐move precision irrigation machine

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