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Communication

Evidence of Arithmetical Uncertainty in Estimation of Light and Water Use Efficiency

Biological Systems Engineering Department, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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Sustainability 2020, 12(6), 2271; https://doi.org/10.3390/su12062271
Received: 24 February 2020 / Revised: 9 March 2020 / Accepted: 10 March 2020 / Published: 14 March 2020
It was demonstrated that conventional resource use efficiency (RUE) estimation methodology is largely subject to arithmetic weakness. Extensive field research data on aboveground biomass (AGB), absorbed photosynthetically active radiation (APAR), and crop evapotranspiration (ETc) in maize, soybean, sorghum, and winter wheat confirmed this methodological bias for light use efficiency (LUE) and water use efficiency (WUE) estimation. LUE and WUE were derived using cumulated (data aggregates across samplings) and independent (data increments across samplings) approaches. Use of cumulated data yielded strong-but-false correlation between AGB and APAR or ETc, being a statistical artefact. RUE values from an independent approach were substantially lower than that from a cumulated approach with greater standard errors. Overall, a cumulated approach tends to oversimplify the complex interactions among carbon and resource coupling in agroecosystems, which is accurately represented when employing an independent approach instead. View Full-Text
Keywords: light use efficiency; radiation use efficiency; water use efficiency; biomass; evapotranspiration; photosynthetically active radiation; row crop; cumulative data light use efficiency; radiation use efficiency; water use efficiency; biomass; evapotranspiration; photosynthetically active radiation; row crop; cumulative data
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MDPI and ACS Style

Kukal, M.S.; Irmak, S. Evidence of Arithmetical Uncertainty in Estimation of Light and Water Use Efficiency. Sustainability 2020, 12, 2271. https://doi.org/10.3390/su12062271

AMA Style

Kukal MS, Irmak S. Evidence of Arithmetical Uncertainty in Estimation of Light and Water Use Efficiency. Sustainability. 2020; 12(6):2271. https://doi.org/10.3390/su12062271

Chicago/Turabian Style

Kukal, Meetpal S., and Suat Irmak. 2020. "Evidence of Arithmetical Uncertainty in Estimation of Light and Water Use Efficiency" Sustainability 12, no. 6: 2271. https://doi.org/10.3390/su12062271

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