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Assessing the potential for site specific irrigation management as a function of field complexity
Authors: Willemijn M. Appels,
Adele Harding,
Amy Carruthers,
Josh Pagdilao,
Michael Kehoe
Identifier: CSBE23221
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Published in: CSBE-SCGAB Technical Conferences » AGM Lethbridge 2023
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Description: Site specific irrigation management (SSIM), where irrigation depths are varied spatially during a field application, is often presented as a method to increase water use efficiency (WUE). However, recent work has shown that any WUE gains are crop, field, and weather dependent. This has implications for the overall effect of adoption of this type of management in a watershed and for the return on investment for producers wishing to adopt the technology required to implement SSIM. Whether SSIM will benefit regions larger than specific fields or crops remains poorly understood. Here we present an analysis that combines regional analysis, a theoretical framework to map the relationship between field heterogeneity and the profit obtained from SSIM technology relative to uniform irrigation, and observational data from 99 sites within 19 commercial, irrigated fields (5-6 sites per field) in southern Alberta from 2019 to 2022. Using a mixed linear modelling approach, we considered the relative influence of soil, weather, and topography on potato productivity. Sites classified as ?flat? tended to have approximately 10% higher yields than the ?non flat? sites (p=0.008). Meanwhile soil complexity (measured as entropy of soil classification types) had a negative impact (p=0.08) that exceeds that of topography in highly complex soils. Variability of soil moisture within a field was weakly correlated with topographical complexity. We determined topographic complexity of >250 fields in the main potato producing areas of southern Alberta to estimate where the adoption of SSIM technology would be the most valuable.
Keywords: precision irrigation, variable rate irrigation, potatoes
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Date: 2023-07-23
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Conference name: CSBE/SCGAB 2023 Annual Conference, Lethbridge, Alberta, 23-26 July 2023.
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Type: Presentation
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Publication type: Text.Abstract
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Coverage: North_America
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
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DOI:
Description: Site specific irrigation management (SSIM), where irrigation depths are varied spatially during a field application, is often presented as a method to increase water use efficiency (WUE). However, recent work has shown that any WUE gains are crop, field, and weather dependent. This has implications for the overall effect of adoption of this type of management in a watershed and for the return on investment for producers wishing to adopt the technology required to implement SSIM. Whether SSIM will benefit regions larger than specific fields or crops remains poorly understood. Here we present an analysis that combines regional analysis, a theoretical framework to map the relationship between field heterogeneity and the profit obtained from SSIM technology relative to uniform irrigation, and observational data from 99 sites within 19 commercial, irrigated fields (5-6 sites per field) in southern Alberta from 2019 to 2022. Using a mixed linear modelling approach, we considered the relative influence of soil, weather, and topography on potato productivity. Sites classified as ?flat? tended to have approximately 10% higher yields than the ?non flat? sites (p=0.008). Meanwhile soil complexity (measured as entropy of soil classification types) had a negative impact (p=0.08) that exceeds that of topography in highly complex soils. Variability of soil moisture within a field was weakly correlated with topographical complexity. We determined topographic complexity of >250 fields in the main potato producing areas of southern Alberta to estimate where the adoption of SSIM technology would be the most valuable.
Keywords: precision irrigation, variable rate irrigation, potatoes
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2023-07-23
Technical field:
Conference name: CSBE/SCGAB 2023 Annual Conference, Lethbridge, Alberta, 23-26 July 2023.
Session name:
Other information:
Type: Presentation
Format:
Publication type: Text.Abstract
Source:
Relation:
Coverage: North_America
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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