caa a22 4500 445864567 CHVBK 20180317145454.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11119-010-9207-0 doi (NATIONALLICENCE)springer-10.1007/s11119-010-9207-0 Evaluation of methods to determine residual soil nitrate zones across the northern Great Plains of the USA [Elektronische Daten] [D. Franzen, D. Long, A. Sims, J. Lamb, F. Casey, J. Staricka, M. Halvorson, V. Hofman] A four-year study was conducted from 2000 to 2004 at eight field sites in Montana, North Dakota and western Minnesota. Five of these sites were in North Dakota, two were in Montana and one was in Minnesota. The sites were diverse in their cropping systems. The objectives of the study were to (1) evaluate data from aerial photographs, satellite images, topographic maps, soil electrical conductivity (ECa) sensors and several years of yield to delineate field zones to represent residual soil nitrate and (2) determine whether the use of data from several such sources or from a single source is better to delineate nitrogen management zones by a weighted method of classification. Despite differences in climate and cropping, there were similarities in the effectiveness of delineation tools for developing meaningful residual soil nitrate zones. Topographic information was usually weighted the most because it produced zones that were more correlated to actual soil residual nitrate than any other source of data at all locations. The soil ECa sensor created better correlated zones at Minot, Williston and Oakes than at most eastern sites. Yield data for an individual year were sometimes useful, but a yield frequency map that combined several years of standardized yield data was more useful. Satellite imagery was better than aerial photographs at most locations. Topography, satellite imagery, yield frequency maps and soil ECa are useful data for delineating nutrient management zones across the region. Use of two or more sources of data resulted in zones with a stronger correlation with soil nitrate. Springer Science+Business Media, LLC, 2010 Nitrogen nationallicence Management zone nationallicence Imagery nationallicence Topography nationallicence Electrical conductivity (ECa) nationallicence Yield mapping nationallicence Franzen D. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut Long D. USDA-ARS-CPCRC, 48037 Tubbs Ranch Road, 97810, Adams, OR, USA aut Sims A. University of Minnesota, 2900 University Ave., 56716, Crookston, MN, USA aut Lamb J. University of Minnesota, 55108, St. Paul, MN, USA aut Casey F. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut Staricka J. Williston Research and Extension Center, North Dakota State University, 14120 Highway 2, 58801, Williston, ND, USA aut Halvorson M. North Central Research and Extension Center, North Dakota State University, 5400 Highway 83, 58701, South Minot, ND, USA aut Hofman V. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 594-606 1385-2256 12:4<594 2011 12 11119 https://doi.org/10.1007/s11119-010-9207-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-010-9207-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Franzen D. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut NATIONALLICENCE 700 1- Long D. USDA-ARS-CPCRC, 48037 Tubbs Ranch Road, 97810, Adams, OR, USA aut NATIONALLICENCE 700 1- Sims A. University of Minnesota, 2900 University Ave., 56716, Crookston, MN, USA aut NATIONALLICENCE 700 1- Lamb J. University of Minnesota, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Casey F. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut NATIONALLICENCE 700 1- Staricka J. Williston Research and Extension Center, North Dakota State University, 14120 Highway 2, 58801, Williston, ND, USA aut NATIONALLICENCE 700 1- Halvorson M. North Central Research and Extension Center, North Dakota State University, 5400 Highway 83, 58701, South Minot, ND, USA aut NATIONALLICENCE 700 1- Hofman V. North Dakota State University, Department 7180, PO Box 6050, Fargo, ND, USA aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/4(2011-08-01), 594-606 1385-2256 12:4<594 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer