author_facet Rubin, John C.
Struffert, Anne M.
Fernández, Fabián G.
Lamb, John A.
Rubin, John C.
Struffert, Anne M.
Fernández, Fabián G.
Lamb, John A.
author Rubin, John C.
Struffert, Anne M.
Fernández, Fabián G.
Lamb, John A.
spellingShingle Rubin, John C.
Struffert, Anne M.
Fernández, Fabián G.
Lamb, John A.
Agronomy Journal
Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
Agronomy and Crop Science
author_sort rubin, john c.
spelling Rubin, John C. Struffert, Anne M. Fernández, Fabián G. Lamb, John A. 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2015.0552 <jats:p>Corn (<jats:italic>Zea mays</jats:italic> L.) in irrigated coarse‐textured soils can be very productive with N applications, but excess N can increase groundwater contamination. Our objectives were to (i) determine the economic optimum nitrogen rate (EONR) for continuous corn (CC) and corn after soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] (CSb), (ii) evaluate corn yield and nitrogen use efficiency (NUE) of split urea‐N and single pre‐plant application of enhanced‐efficiency fertilizers, and (iii) determine the utility of canopy sensors and basal stalk nitrate‐N test to manage N. Rotations of CC in Dakota County, Minnesota, and CC, CSb, and soybean after corn (SbC) in Pope County, Minnesota, were established in 2011 to 2014 with 0, 45, 90, 135, 180, 225, 270, and 315 kg urea‐N ha<jats:sup>−1</jats:sup> as split‐application (half at pre‐plant and half at V4), and pre‐plant applications of SuperU (Koch Fertilizer LLC, Wichita, KS) at 180 kg N ha<jats:sup>−1</jats:sup>, ESN(Agrium Advanced Technologies, Loveland, CO)/urea blend 90/90 kg Nha<jats:sup>−1</jats:sup>, and ESN at 180 and 225 kg N ha<jats:sup>−1</jats:sup>. The EONR for CC was 233 kg N ha<jats:sup>−1</jats:sup>. The fertilizer replacement value in CSb was 56 kg N ha<jats:sup>−1</jats:sup> and the EONR was 49 kg N ha<jats:sup>−1</jats:sup> less than in CC. Canopy sensors and basal stalk nitrate‐N generally under estimated N rate. A split‐urea application increased corn grain yield by 5.4% (0.63 Mg ha<jats:sup>−1</jats:sup>), partial factor productivity (PFP) by 6% and agronomic efficiency (AE) by 12% relative to mean single pre‐plant application of enhanced‐efficiency fertilizers. In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p><jats:p>Core Ideas <jats:list list-type="bullet"> <jats:list-item><jats:p>In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p></jats:list-item> <jats:list-item><jats:p>Canopy sensors and basal stalk nitrate‐N generally under estimated N rate needed to optimize grain yield.</jats:p></jats:list-item> <jats:list-item><jats:p>Enhanced efficiency fertilizers applied at pre‐plant are not as effective as split applications of urea in irrigated sandy soils.</jats:p></jats:list-item> </jats:list></jats:p> Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils Agronomy Journal
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title Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_unstemmed Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_full Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_fullStr Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_full_unstemmed Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_short Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_sort maize yield and nitrogen use efficiency in upper midwest irrigated sandy soils
topic Agronomy and Crop Science
url http://dx.doi.org/10.2134/agronj2015.0552
publishDate 2016
physical 1681-1691
description <jats:p>Corn (<jats:italic>Zea mays</jats:italic> L.) in irrigated coarse‐textured soils can be very productive with N applications, but excess N can increase groundwater contamination. Our objectives were to (i) determine the economic optimum nitrogen rate (EONR) for continuous corn (CC) and corn after soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] (CSb), (ii) evaluate corn yield and nitrogen use efficiency (NUE) of split urea‐N and single pre‐plant application of enhanced‐efficiency fertilizers, and (iii) determine the utility of canopy sensors and basal stalk nitrate‐N test to manage N. Rotations of CC in Dakota County, Minnesota, and CC, CSb, and soybean after corn (SbC) in Pope County, Minnesota, were established in 2011 to 2014 with 0, 45, 90, 135, 180, 225, 270, and 315 kg urea‐N ha<jats:sup>−1</jats:sup> as split‐application (half at pre‐plant and half at V4), and pre‐plant applications of SuperU (Koch Fertilizer LLC, Wichita, KS) at 180 kg N ha<jats:sup>−1</jats:sup>, ESN(Agrium Advanced Technologies, Loveland, CO)/urea blend 90/90 kg Nha<jats:sup>−1</jats:sup>, and ESN at 180 and 225 kg N ha<jats:sup>−1</jats:sup>. The EONR for CC was 233 kg N ha<jats:sup>−1</jats:sup>. The fertilizer replacement value in CSb was 56 kg N ha<jats:sup>−1</jats:sup> and the EONR was 49 kg N ha<jats:sup>−1</jats:sup> less than in CC. Canopy sensors and basal stalk nitrate‐N generally under estimated N rate. A split‐urea application increased corn grain yield by 5.4% (0.63 Mg ha<jats:sup>−1</jats:sup>), partial factor productivity (PFP) by 6% and agronomic efficiency (AE) by 12% relative to mean single pre‐plant application of enhanced‐efficiency fertilizers. In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p><jats:p>Core Ideas <jats:list list-type="bullet"> <jats:list-item><jats:p>In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p></jats:list-item> <jats:list-item><jats:p>Canopy sensors and basal stalk nitrate‐N generally under estimated N rate needed to optimize grain yield.</jats:p></jats:list-item> <jats:list-item><jats:p>Enhanced efficiency fertilizers applied at pre‐plant are not as effective as split applications of urea in irrigated sandy soils.</jats:p></jats:list-item> </jats:list></jats:p>
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author Rubin, John C., Struffert, Anne M., Fernández, Fabián G., Lamb, John A.
author_facet Rubin, John C., Struffert, Anne M., Fernández, Fabián G., Lamb, John A., Rubin, John C., Struffert, Anne M., Fernández, Fabián G., Lamb, John A.
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description <jats:p>Corn (<jats:italic>Zea mays</jats:italic> L.) in irrigated coarse‐textured soils can be very productive with N applications, but excess N can increase groundwater contamination. Our objectives were to (i) determine the economic optimum nitrogen rate (EONR) for continuous corn (CC) and corn after soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] (CSb), (ii) evaluate corn yield and nitrogen use efficiency (NUE) of split urea‐N and single pre‐plant application of enhanced‐efficiency fertilizers, and (iii) determine the utility of canopy sensors and basal stalk nitrate‐N test to manage N. Rotations of CC in Dakota County, Minnesota, and CC, CSb, and soybean after corn (SbC) in Pope County, Minnesota, were established in 2011 to 2014 with 0, 45, 90, 135, 180, 225, 270, and 315 kg urea‐N ha<jats:sup>−1</jats:sup> as split‐application (half at pre‐plant and half at V4), and pre‐plant applications of SuperU (Koch Fertilizer LLC, Wichita, KS) at 180 kg N ha<jats:sup>−1</jats:sup>, ESN(Agrium Advanced Technologies, Loveland, CO)/urea blend 90/90 kg Nha<jats:sup>−1</jats:sup>, and ESN at 180 and 225 kg N ha<jats:sup>−1</jats:sup>. The EONR for CC was 233 kg N ha<jats:sup>−1</jats:sup>. The fertilizer replacement value in CSb was 56 kg N ha<jats:sup>−1</jats:sup> and the EONR was 49 kg N ha<jats:sup>−1</jats:sup> less than in CC. Canopy sensors and basal stalk nitrate‐N generally under estimated N rate. A split‐urea application increased corn grain yield by 5.4% (0.63 Mg ha<jats:sup>−1</jats:sup>), partial factor productivity (PFP) by 6% and agronomic efficiency (AE) by 12% relative to mean single pre‐plant application of enhanced‐efficiency fertilizers. In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p><jats:p>Core Ideas <jats:list list-type="bullet"> <jats:list-item><jats:p>In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p></jats:list-item> <jats:list-item><jats:p>Canopy sensors and basal stalk nitrate‐N generally under estimated N rate needed to optimize grain yield.</jats:p></jats:list-item> <jats:list-item><jats:p>Enhanced efficiency fertilizers applied at pre‐plant are not as effective as split applications of urea in irrigated sandy soils.</jats:p></jats:list-item> </jats:list></jats:p>
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spelling Rubin, John C. Struffert, Anne M. Fernández, Fabián G. Lamb, John A. 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2015.0552 <jats:p>Corn (<jats:italic>Zea mays</jats:italic> L.) in irrigated coarse‐textured soils can be very productive with N applications, but excess N can increase groundwater contamination. Our objectives were to (i) determine the economic optimum nitrogen rate (EONR) for continuous corn (CC) and corn after soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] (CSb), (ii) evaluate corn yield and nitrogen use efficiency (NUE) of split urea‐N and single pre‐plant application of enhanced‐efficiency fertilizers, and (iii) determine the utility of canopy sensors and basal stalk nitrate‐N test to manage N. Rotations of CC in Dakota County, Minnesota, and CC, CSb, and soybean after corn (SbC) in Pope County, Minnesota, were established in 2011 to 2014 with 0, 45, 90, 135, 180, 225, 270, and 315 kg urea‐N ha<jats:sup>−1</jats:sup> as split‐application (half at pre‐plant and half at V4), and pre‐plant applications of SuperU (Koch Fertilizer LLC, Wichita, KS) at 180 kg N ha<jats:sup>−1</jats:sup>, ESN(Agrium Advanced Technologies, Loveland, CO)/urea blend 90/90 kg Nha<jats:sup>−1</jats:sup>, and ESN at 180 and 225 kg N ha<jats:sup>−1</jats:sup>. The EONR for CC was 233 kg N ha<jats:sup>−1</jats:sup>. The fertilizer replacement value in CSb was 56 kg N ha<jats:sup>−1</jats:sup> and the EONR was 49 kg N ha<jats:sup>−1</jats:sup> less than in CC. Canopy sensors and basal stalk nitrate‐N generally under estimated N rate. A split‐urea application increased corn grain yield by 5.4% (0.63 Mg ha<jats:sup>−1</jats:sup>), partial factor productivity (PFP) by 6% and agronomic efficiency (AE) by 12% relative to mean single pre‐plant application of enhanced‐efficiency fertilizers. In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p><jats:p>Core Ideas <jats:list list-type="bullet"> <jats:list-item><jats:p>In irrigated sandy soils, applying high rates of N needed for economic optimum yield is best accomplished by splitting the application.</jats:p></jats:list-item> <jats:list-item><jats:p>Canopy sensors and basal stalk nitrate‐N generally under estimated N rate needed to optimize grain yield.</jats:p></jats:list-item> <jats:list-item><jats:p>Enhanced efficiency fertilizers applied at pre‐plant are not as effective as split applications of urea in irrigated sandy soils.</jats:p></jats:list-item> </jats:list></jats:p> Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils Agronomy Journal
spellingShingle Rubin, John C., Struffert, Anne M., Fernández, Fabián G., Lamb, John A., Agronomy Journal, Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils, Agronomy and Crop Science
title Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_full Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_fullStr Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_full_unstemmed Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_short Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
title_sort maize yield and nitrogen use efficiency in upper midwest irrigated sandy soils
title_unstemmed Maize Yield and Nitrogen Use Efficiency in Upper Midwest Irrigated Sandy Soils
topic Agronomy and Crop Science
url http://dx.doi.org/10.2134/agronj2015.0552