Evaluating Irrigation Scheduling Efficiency of Paddy Rice and Berseem Fodder Crops in Sandy Loam Soil

Ks, Hari Prasad; Dh, Samuel; Csp, Ojha; Gs, Kaushika; Adeloye, Adebayo J.

doi:10.4172/2168-9768.1000147

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…Rainfed paddies are the object of a study developed in Thailand. Intermittent flooding irrigation is reported in four Asian studies (Agrawal et al, 2004;Arif et al, 2012;Hatiye et al, 2015;Oue and Laban, 2019). Aerobic rice cropping is reported by Asian researchers relative to surface irrigation (Alberto et al, 2011;Kadiyala et al, 2012;Choudhury et al, 2013) and by Europeans relative to sprinkler irrigation (Spanu et al, 2009;Moratiel and Martínez-Cob, 2013), which coincide with the dominant type of irrigation of rice in Asia and Europe, respectively.…”

Section: Review On Applicationsmentioning

confidence: 94%

“…However, only two K cb studies were selected (Vories et al, 2013;Alberto et al, 2014) and related K cb data are also included in Table 9. Most reported studies refer to flooded rice paddies adopting reduced water depths aimed at water saving (Tyagi et al, 2000a;Mao et al, 2004;Vu et al, 2005;Alberto et al, 2011Alberto et al, , 2014Arif et al, 2012;Kadiyala et al, 2012;Hatiye et al, 2015;Linquist et al, 2015;Djaman et al, 2019;Diaz et al, 2019).…”

Section: Review On Applicationsmentioning

confidence: 99%

“…A variety of ET estimation methods were used in the reported studies (Table 9). A paddy water balance (PWB) approach was adopted using pairs of microlysimeters with open and closed bottom for assessing deep percolation, where twice studies adopted a simplified model with a Darcy approach to consider the different behaviors of the plowed layer, the compacted layer and the lower layer (Paulo et al, 1995;Mao et al, 2004;Hatiye et al, 2015). Choudhury et al (2013) also used microlysimeters in combination with the SWB when studying intermittent irrigation.…”

Section: Review On Applicationsmentioning

confidence: 99%

“…Reference (m) (m) (m m − ) p Flooded paddies Tyagi et al (2000a) n/r n/r 3.9 n/r n/r Vu et al (2005) n/r 0.55 n/r n/r n/r Arif et al (2012) n/r 1.36 n/r n/r n/r Kadiyala et al (2012) n/r n/r 3.32 n/r n/r Linquist et al (2015) n/r 0.90-1.00 n/r n/r n/r Hatiye et al (2015) 0.30 n/r n/r n/r 0.10 of saturation…”

Section: Table 10mentioning

confidence: 99%

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Standard single and basal crop coefficients for field crops. Updates and advances to the FAO56 crop water requirements method

Pereira

Paredes

Hunsaker

et al. 2021

Agricultural Water Management

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This study reviews the abundant research on FAO56 crop coefficients, published following introduction of the FAO56 paper in 1998. The primary goal was to evaluate, update, and consolidate the mid-season and end-season single (K c ) and basal (K cb ) crop coefficients, tabulated for many field crops in FAO56. The review found that the prevalent approach for estimating crop evapotranspiration (ET c ) is the FAO56 K c -ET o approach, i.e., the product of the K c and reference evapotranspiration (ET o ). The FAO56 K c -ET o approach requires use of the FAO56 PM-ET o grass reference equation with appropriate crop-specific K c and/or K cb . Reviewed research provided various approaches to determine K c and K cb and used a variety of actual crop ET (ET c act ) measurements. Significant attention was placed on accessing the accuracy of the field measurements and models used in these studies. Accuracy requirements, upper limits for K c values, and related causal errors are discussed. Conceptual approaches relative to K c transferability requirements are provided with focus on standard crop conditions and use of the FAO56 segmented K c curve. Papers selected to update K c ∕K cb used the FAO56 PM-ET o , provided accurate measurements to determine and partition ET c act , and satisfied transferability requirements. Selected observed K c and K cb values were converted to standard, sub-humid climate as adopted in FAO56. Observed values, with respect to tabulated FAO56 K c and K cb , were used in consolidating updated values for crops within general categories of grain legumes, fiber crops, oil crops, sugar crops, small grain cereals, maize and sorghum, and rice. Ancillary data, e.g., maximum root depth and crop height, were also collected from selected literature and tabulated. Results showed good agreement between updated and original tabulated FAO56 K c and K cb , confirming the reliability of the FAO56 values. This indicates change in the K c (ET c /ET o ratio) of crops has not occurred due to climate change during the past ≈sixty years. New K c ∕K cb data for crops, not included in FAO56, are also now presented for several oil crops and pseudocereals. The approach adopted for rice differs from FAO56 because consideration was given to the numerous rice water management practices currently used and, thus, K c ∕K cb values for the initial season of rice were also presented. The review also observed that many research papers did not satisfy the adopted requirements in terms of ET o method and/or the accuracy of ET c act determinations and, therefore, could not be used. Thus, emphasis is placed on adopting improved accuracy and quality control in future research aimed at determining K c data comparable to presented values. The transferability of standard K c and K cb has been assured for the values tabulated herein. Improved future applications of the FAO56 K c -ET o method should consider remote sensing observations when available, particularly in defining crop growth stages at given locations.

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