| Corn yield response to nitrogen fertilizer timing and deficiency level PC Scharf, WJ Wiebold, JA Lory Agronomy Journal 94 (3), 435-441, 2002 | 336 | 2002 |
| Field‐scale variability in optimal nitrogen fertilizer rate for corn PC Scharf, NR Kitchen, KA Sudduth, JG Davis, VC Hubbard, JA Lory Agronomy journal 97 (2), 452-461, 2005 | 319 | 2005 |
| Strengths and limitations of nitrogen rate recommendations for corn and opportunities for improvement TF Morris, TS Murrell, DB Beegle, JJ Camberato, RB Ferguson, J Grove, ... Agronomy journal 110 (1), 1-37, 2018 | 285 | 2018 |
| Ground‐based canopy reflectance sensing for variable‐rate nitrogen corn fertilization NR Kitchen, KA Sudduth, ST Drummond, PC Scharf, HL Palm, DF Roberts, ... Agronomy Journal 102 (1), 71-84, 2010 | 223 | 2010 |
| Calibrating corn color from aerial photographs to predict sidedress nitrogen need PC Scharf, JA Lory Agronomy journal 94 (3), 397-404, 2002 | 219 | 2002 |
| Chlorophyll meter readings can predict nitrogen need and yield response of corn in the north‐central USA PC Scharf, SM Brouder, RG Hoeft Agronomy Journal 98 (3), 655-665, 2006 | 215 | 2006 |
| Yield goal versus delta yield for predicting fertilizer nitrogen need in corn JA Lory, PC Scharf Agronomy Journal 95 (4), 994-999, 2003 | 174 | 2003 |
| Sensor‐based nitrogen applications out‐performed producer‐chosen rates for corn in on‐farm demonstrations PC Scharf, DK Shannon, HL Palm, KA Sudduth, ST Drummond, ... Agronomy Journal 103 (6), 1683-1691, 2011 | 173 | 2011 |
| Economically optimal nitrogen rate reduces soil residual nitrate N Hong, PC Scharf, JG Davis, NR Kitchen, KA Sudduth Journal of environmental quality 36 (2), 354-362, 2007 | 166 | 2007 |
| Remote sensing for nitrogen management PC Scharf, JP Schmidt, NR Kitchen, KA Sudduth, SY Hong, JA Lory, ... Journal of soil and water conservation 57 (6), 518-524, 2002 | 92 | 2002 |
| Calibrating reflectance measurements to predict optimal sidedress nitrogen rate for corn PC Scharf, JA Lory Agronomy journal 101 (3), 615-625, 2009 | 90 | 2009 |
| Spatially variable corn yield is a weak predictor of optimal nitrogen rate PC Scharf, NR Kitchen, KA Sudduth, JG Davis Soil Science Society of America Journal 70 (6), 2154-2160, 2006 | 89 | 2006 |
| SOIL AND PLANT TESTS TO PREDICT OPTIMUM NITROGEN RATES FOR CORN* PC Scharf Journal of Plant Nutrition 24 (6), 805-826, 2001 | 87 | 2001 |
| Nitrogen management for winter wheat: principles and recommendations MM Alley, PC Scharf, DE Brann, WE Baethgen, JL Hammons Virginia Cooperative Extension, 2009 | 77 | 2009 |
| Spring nitrogen on winter wheat: II. A flexible multicomponent rate recommendation system PC Scharf, MM Alley Agronomy journal 85 (6), 1186-1192, 1993 | 73 | 1993 |
| What does it take to detect a change in soil carbon stock? A regional comparison of minimum detectable difference and experiment duration in the north central United States M Necpálová, RP Anex, AN Kravchenko, LJ Abendroth, SJ Del Grosso, ... Journal of Soil and Water Conservation 69 (6), 517-531, 2014 | 65 | 2014 |
| Nitrogen loss pathways and nitrogen loss inhibitors: a review. PC Scharf, MM Alley | 61 | 1988 |
| Corn nitrogen rate recommendation tools’ performance across eight US midwest corn belt states CJ Ransom, NR Kitchen, JJ Camberato, PR Carter, RB Ferguson, ... Agronomy Journal 112 (1), 470-492, 2020 | 60 | 2020 |
| Will variable‐rate nitrogen fertilization using corn canopy reflectance sensing deliver environmental benefits? DF Roberts, NR Kitchen, PC Scharf, KA Sudduth Agronomy Journal 102 (1), 85-95, 2010 | 59 | 2010 |
| Agricultural management of enhanced‐efficiency fertilizers in the north‐central United States KA Nelson, PC Scharf, LG Bundy, P Tracy Crop Management 7 (1), 1-12, 2008 | 53 | 2008 |
