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Abstract
Four free-air CO2 enrichment (FACE) experiments were conducted on wheat (Triticum aestivum L. cv. Yecora Rojo) at Maricopa, Arizona, U.S.A. from December, 1992 through May, 1997. The first two were conducted at ample and limited (50% of ample) supplies of water, and second two at ample (350 kg N ha-1) and limited (70 and 15 kg N ha-1) supplies of fertilizer nitrogen. More than 50 scientists participated, and they collected a large and varied set of data on plant, soil, and microclimatic responses to the elevated CO2 and its interactions with the water and N treatments. The dataset has been popular with wheat growth modelers who have utilized the growth, yield, and other data to validate their models, which get used to predict likely future wheat productivity with projected global change. The dataset assembled herein contains many of these data, including management, soils, weather, physiology, phenology, biomass growth, leaf area, yield, quality, canopy temperatures, energy balance, soil moisture, nitrogen assimilation, and other data. Data access via DOI 10.7910/DVN/YRTQ3Z.
Highlights
During the 1980s, after more than two decades of CO2 concentration measurements at Mauna Loa documenting the increasing atmospheric CO2 concentration, there was concern about what higher CO2 concentrations would portend for agricultural crops, as well as for natural ecosystems
Four free-air CO2 enrichment (FACE) experiments were conducted on wheat
Two free-air CO2 enrichment (FACE) experiments at ample and limiting levels of water supply were conducted from December through May 1992-93 and 1993-94
Summary
During the 1980s, after more than two decades of CO2 concentration measurements at Mauna Loa (http://www.esrl.noaa.gov/gmd/ccgg/trends/full.html) documenting the increasing atmospheric CO2 concentration, there was concern about what higher CO2 concentrations would portend for agricultural crops, as well as for natural ecosystems. The management, weather, growth, and yield data were formatted in the IBSNAT format, which is obsolete, and they were re-formatted to ICASA Version 1.0 They have been converted to ICASA Version 2.0 (White et al, 2013), which in turn is undergoing some modifications under the umbrella of the AgMIP (Agricultural Model Inter-comparison and Improvement Project; http://www.agmip.org/). These data are included in this dataset in file Biomass Area Phenology Management Weather Soil Moisture.ods. They currently are being used in another AgMIP model inter-comparison study involving wheat models which utilize canopy temperature information (as opposed to just growing the crop at air temperature)
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