A methodology to optimize site-specific field capacity and irrigation thresholds
The determination of field capacity (FC), irrigation thresholds, and irrigation amounts is characterized by site-specific soil hydraulic properties (SHPs). This study, conducted in two zones (zone 1 and zone 2) delineated based on soil, topography, and historical crop yield in Alabama (USA), focused...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-08-01
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| Series: | Agricultural Water Management |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378377423002500 |
| _version_ | 1797448159310381056 |
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| author | Hemendra Kumar Puneet Srivastava Jasmeet Lamba Bruno Lena Efstathios Diamantopoulos Brenda Ortiz Bijoychandra Takhellambam Guilherme Morata Luca Bondesan |
| author_facet | Hemendra Kumar Puneet Srivastava Jasmeet Lamba Bruno Lena Efstathios Diamantopoulos Brenda Ortiz Bijoychandra Takhellambam Guilherme Morata Luca Bondesan |
| author_sort | Hemendra Kumar |
| collection | DOAJ |
| description | The determination of field capacity (FC), irrigation thresholds, and irrigation amounts is characterized by site-specific soil hydraulic properties (SHPs). This study, conducted in two zones (zone 1 and zone 2) delineated based on soil, topography, and historical crop yield in Alabama (USA), focused on determining zone-specific FC using negligible drainage flux qfc criterion. The HYDRUS-1D model was used to optimize zone-specific SHPs using measured soil matric potential (h). The zone-specific FCs were determined using optimized and raw SHPs at 0.01 cm/day as qfc. The results showed that the optimized FC at qfc was at −39 kPa in zone 1 and raw FC was at −15 kPa. However, in zone 2, optimized FC was at −25 kPa and raw FC was at −59 kPa. To validate that optimized values are more accurate than raw values, a relationship between accumulated crop evapotranspiration (ETc) and required irrigation amount was determined using optimized parameters (SHPs and FC) and showed a stronger correlation in both zones than using raw parameters (SHPs and FC). At flux-based FC, the optimized irrigation thresholds and amounts in zone 1 were −88 kPa and 20 mm, and raw irrigation threshold and amount were −58 kPa and 33 mm, respectively. In zone 2, the optimized irrigation thresholds and amounts were −45 kPa and 18 mm, and raw irrigation threshold and amount were −116 kPa and 14 mm, respectively. Therefore, using raw and benchmark FC can result in inefficient irrigation strategies. The proposed novel method of optimizing zone-specific FC and irrigation thresholds can help with adopting timely best irrigation management schemes in respective zones. |
| first_indexed | 2024-03-09T14:06:26Z |
| format | Article |
| id | doaj.art-f68019fa14684b8aaaa3a7aa4d98be56 |
| institution | Directory Open Access Journal |
| issn | 1873-2283 |
| language | English |
| last_indexed | 2024-03-09T14:06:26Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Agricultural Water Management |
| spelling | doaj.art-f68019fa14684b8aaaa3a7aa4d98be562023-11-30T05:05:34ZengElsevierAgricultural Water Management1873-22832023-08-01286108385A methodology to optimize site-specific field capacity and irrigation thresholdsHemendra Kumar0Puneet Srivastava1Jasmeet Lamba2Bruno Lena3Efstathios Diamantopoulos4Brenda Ortiz5Bijoychandra Takhellambam6Guilherme Morata7Luca Bondesan8Department of Biosystems Engineering, Auburn University, AL, USA; School of Environment and Natural Resources, The Ohio State University, Wooster, OH, USA; Correspondence to: Ohio Agricultural Research and Development Center, The Ohio State University,127A Williams Hall,44691, USA.College of Agriculture and Natural Resources, University of Maryland, College Park, MD, USA; Maryland Agricultural Experiment Station, University of Maryland, College Park, MD, USADepartment of Biosystems Engineering, Auburn University, AL, USAInstitute of Agriculture and Natural Resources, University of Nebraska, NE, USAChair of Soil Physics, University of Bayreuth, Bayreuth, GermanyDepartment of Crop, Soil and Environmental Sciences, Auburn University, AL, USADepartment of Biosystems Engineering, Auburn University, AL, USAAlabama Agricultural Experiment Station, Auburn University, Auburn, AL, USADepartment of Crop, Soil and Environmental Sciences, Auburn University, AL, USAThe determination of field capacity (FC), irrigation thresholds, and irrigation amounts is characterized by site-specific soil hydraulic properties (SHPs). This study, conducted in two zones (zone 1 and zone 2) delineated based on soil, topography, and historical crop yield in Alabama (USA), focused on determining zone-specific FC using negligible drainage flux qfc criterion. The HYDRUS-1D model was used to optimize zone-specific SHPs using measured soil matric potential (h). The zone-specific FCs were determined using optimized and raw SHPs at 0.01 cm/day as qfc. The results showed that the optimized FC at qfc was at −39 kPa in zone 1 and raw FC was at −15 kPa. However, in zone 2, optimized FC was at −25 kPa and raw FC was at −59 kPa. To validate that optimized values are more accurate than raw values, a relationship between accumulated crop evapotranspiration (ETc) and required irrigation amount was determined using optimized parameters (SHPs and FC) and showed a stronger correlation in both zones than using raw parameters (SHPs and FC). At flux-based FC, the optimized irrigation thresholds and amounts in zone 1 were −88 kPa and 20 mm, and raw irrigation threshold and amount were −58 kPa and 33 mm, respectively. In zone 2, the optimized irrigation thresholds and amounts were −45 kPa and 18 mm, and raw irrigation threshold and amount were −116 kPa and 14 mm, respectively. Therefore, using raw and benchmark FC can result in inefficient irrigation strategies. The proposed novel method of optimizing zone-specific FC and irrigation thresholds can help with adopting timely best irrigation management schemes in respective zones.http://www.sciencedirect.com/science/article/pii/S0378377423002500Soil hydraulic propertiesSoil water retention curveHydraulic conductivity curveNegligible drainage fluxHYPROPHYDRUS |
| spellingShingle | Hemendra Kumar Puneet Srivastava Jasmeet Lamba Bruno Lena Efstathios Diamantopoulos Brenda Ortiz Bijoychandra Takhellambam Guilherme Morata Luca Bondesan A methodology to optimize site-specific field capacity and irrigation thresholds Agricultural Water Management Soil hydraulic properties Soil water retention curve Hydraulic conductivity curve Negligible drainage flux HYPROP HYDRUS |
| title | A methodology to optimize site-specific field capacity and irrigation thresholds |
| title_full | A methodology to optimize site-specific field capacity and irrigation thresholds |
| title_fullStr | A methodology to optimize site-specific field capacity and irrigation thresholds |
| title_full_unstemmed | A methodology to optimize site-specific field capacity and irrigation thresholds |
| title_short | A methodology to optimize site-specific field capacity and irrigation thresholds |
| title_sort | methodology to optimize site specific field capacity and irrigation thresholds |
| topic | Soil hydraulic properties Soil water retention curve Hydraulic conductivity curve Negligible drainage flux HYPROP HYDRUS |
| url | http://www.sciencedirect.com/science/article/pii/S0378377423002500 |
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