Corn Yield Response to Deficit Irrigation

Klocke, Norman L.; Currie, R. S.

doi:10.1061/41173(414)283

Cited by 19 publications

(41 citation statements)

References 6 publications

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“…Agricultural PIrrUse and corresponding increases in productivity have been simulated by the GGCMs only for irrigation management with a 100% saturation threshold for applications (i.e., once an irrigation event is triggered, water is applied until soil moisture is optimal; SI Appendix, Tables S3 and S4). Because the efficiency of irrigation water use (yield per unit water) declines at higher irrigation levels (38), water sharing and deficit irrigation could have an overall beneficial effect in constrained regions. Another source of uncertainty relates to our assumptions regarding fossil groundwater availability.…”

Section: Resultsmentioning

confidence: 99%

Constraints and potentials of future irrigation water availability on agricultural production under climate change

Elliott

Deryng

Müller

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

919

525

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We compare ensembles of water supply and demand projections from 10 global hydrological models and six global gridded crop models. These are produced as part of the Inter-Sectoral Impacts Model Intercomparison Project, with coordination from the Agricultural Model Intercomparison and Improvement Project, and driven by outputs of general circulation models run under representative concentration pathway 8.5 as part of the Fifth Coupled Model Intercomparison Project. Models project that direct climate impacts to maize, soybean, wheat, and rice involve losses of 4001,400 Pcal (8-24% of present-day total) when CO2 fertilization effects are accounted for or 1,400-2,600 Pcal (24-43%) otherwise. Freshwater limitations in some irrigated regions (western United States; China; and West, South, and Central Asia) could necessitate the reversion of 20-60 Mha of cropland from irrigated to rainfed management by end-of-century, and a further loss of 600-2,900 Pcal of food production. In other regions (northern/eastern United States, parts of South America, much of Europe, and South East Asia) surplus water supply could in principle support a net increase in irrigation, although substantial investments in irrigation infrastructure would be required

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Section: Resultsmentioning

confidence: 99%

Constraints and potentials of future irrigation water availability on agricultural production under climate change

Elliott

Deryng

Müller

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

919

525

View full text Add to dashboard Cite

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“…Klocke et al (2007) studied the relationship between corn yield and irrigation from 1986 to 1998 in west central Nebraska and found that 90% of full irrigation grain yields could be gained by applying only 47% of full irrigation. Klocke et al (2011) conducted a field study of fully irrigated to deficit-irrigated corn grain in 2005 to 2009 in southwest Kansas and reported that yield variability increased as irrigation decreased, illustrating a greater income risk with less irrigation. As water resources continue to decline, deficit irrigation is becoming an important strategy for minimizing agricultural water use.…”

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confidence: 99%

Impact of Deficit Irrigation on Sorghum Physical and Chemical Properties and Ethanol Yield

Liu¹,

Maier²,

Klocke³

et al. 2013

Trans.ASABE

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“…A limited irrigation cropping systems study was conducted at the Kansas State University Southwest ResearchExtension Center Finnup farm (38° 1′ 20.87″ N, 100° 49′ 26.95″ W, elevation of 887 m above mean sea level) near Garden City, Kansas, from 2005 to 2012; experimental results were reported by Klocke et al (2011Klocke et al ( , 2014. The climate of the area is semi-arid.…”

Section: Experimental Datamentioning

confidence: 97%

“…Soil physical and hydraulic properties including saturated water content, upper drain limit, lower drain limit, and bulk density for the Ulysses silt loam were obtained from Klocke et al (2011) (table 3). The root growth weighting factor (for different soil layers) to a depth of 1.2 m in increments of 10 cm was adjusted in order to achieve acceptable fit between simulated and measured yield, aboveground biomass, and maximum LAI.…”

Section: Model Calibration and Validationmentioning

confidence: 99%