|Improving nitrogen use efficiency in cereal grain production with optical sensing and variable rate application|
WR Raun, JB Solie, GV Johnson, ML Stone, RW Mullen, KW Freeman, ...
Agronomy Journal 94 (4), 815-820, 2002
|Optical sensor‐based algorithm for crop nitrogen fertilization|
WR Raun, JB Solie, ML Stone, KL Martin, KW Freeman, RW Mullen, ...
Communications in Soil Science and Plant Analysis 36 (19-20), 2759-2781, 2005
|In‐season prediction of corn grain yield potential using normalized difference vegetation index|
RK Teal, B Tubana, K Girma, KW Freeman, DB Arnall, O Walsh, WR Raun
Agronomy Journal 98 (6), 1488-1494, 2006
|Nitrogen fertilization optimization algorithm based on in-season estimates of yield and plant nitrogen uptake|
EV Lukina, KW Freeman, KJ Wynn, WE Thomason, RW Mullen, ML Stone, ...
Journal of plant nutrition 24 (6), 885-898, 2001
|By‐plant prediction of corn forage biomass and nitrogen uptake at various growth stages using remote sensing and plant height|
KW Freeman, K Girma, DB Arnall, RW Mullen, KL Martin, RK Teal, ...
Agronomy Journal 99 (2), 530-536, 2007
|Identifying an in‐season response index and the potential to increase wheat yield with nitrogen|
RW Mullen, KW Freeman, WR Raun, GV Johnson, ML Stone, JB Solie
Agronomy Journal 95 (2), 347-351, 2003
|Influence of late‐season foliar nitrogen applications on yield and grain nitrogen in winter wheat|
CW Woolfolk, WR Raun, GV Johnson, WE Thomason, RW Mullen, ...
Agronomy Journal 94 (3), 429-434, 2002
|Switchgrass response to harvest frequency and time and rate of applied nitrogen|
WE Thomason, WR Raun, GV Johnson, CM Taliaferro, KW Freeman, ...
Journal of Plant Nutrition 27 (7), 1199-1226, 2005
|Evaluation of green, red, and near infrared bands for predicting winter wheat biomass, nitrogen uptake, and final grain yield|
SM Moges, WR Raun, RW Mullen, KW Freeman, GV Johnson, JB Solie
Journal of plant nutrition 27 (8), 1431-1441, 2005
|Expression of variability in corn as influenced by growth stage using optical sensor measurements|
KL Martin, K Girma, KW Freeman, RK Teal, B Tubańa, DB Arnall, B Chung, ...
Agronomy Journal 99 (2), 384-389, 2007
|Effect of potassic and phosphatic fertilizer type, fertilizer Cd concentration and zinc rate on cadmium uptake by potatoes|
MJ McLaughlin, NA Maier, K Freeman, KG Tiller, CMJ Williams, MK Smart
Fertilizer research 40 (1), 63-70, 1995
|Effect of foliar application of phosphorus on winter wheat grain yield, phosphorus uptake, and use efficiency|
J Mosali, K Desta, RK Teal, KW Freeman, KL Martin, JW Lawles, ...
Journal of Plant Nutrition 29 (12), 2147-2163, 2006
|Cotton lint yield and quality as affected by applications of N, P, and K fertilizers|
K Girma, RK Teal, KW Freeman, RK Boman, WR Raun
Journal of Cotton Science, 2007
|Determination of optimum rate and growth stage for foliar‐applied phosphorus in corn|
K Girma, KL Martin, KW Freeman, J Mosali, RK Teal, WR Raun, ...
Communications in Soil Science and Plant Analysis 38 (9-10), 1137-1154, 2007
|Plant‐to‐plant variability in corn production|
KL Martin, PJ Hodgen, KW Freeman, R Melchiori, DB Arnall, RK Teal, ...
Agronomy journal 97 (6), 1603-1611, 2005
|Growth stage, development, and spatial variability in corn evaluated using optical sensor readings|
WR Raun, JB Solie, KL Martin, KW Freeman, ML Stone, GV Johnson, ...
Journal of plant nutrition 28 (1), 173-182, 2005
|Late-season prediction of wheat grain yield and grain protein|
KW Freeman, WR Raun, GV Johnson, RW Mullen, ML Stone, JB Solie
Communications in Soil Science and Plant Analysis 34 (13-14), 1837-1852, 2003
|Forage and grain yield response to applied sulfur in winter wheat as influenced by source and rate|
K Girma, J Mosali, KW Freeman, WR Raun, KL Martin, WE Thomason
Journal of plant nutrition 28 (9), 1541-1553, 2005
|Use of within-field-element-size CV for improved nutrient fertilization in crop production|
WR Raun, GV Johnson, JB Solie, ML Stone, K Freeman
US Patent 7,188,450, 2007
|Production system techniques to increase nitrogen use efficiency in winter wheat|
WE Thomason, WR Raun, GV Johnson, KW Freeman, KJ Wynn, ...
Journal of Plant Nutrition 25 (10), 2261-2283, 2002