Authors: Shanahan, JF Schepers, JS Francis, DD Varvel, GE Wilhelm, WW Tringe, JM Schlemmer, MR Major, DJ

Citation: Jf. Shanahan et al., Use of remote-sensing imagery to estimate corn grain yield, AGRON J, 93(3), 2001, pp. 583-589

Authors: Varvel, GE

Citation: Ge. Varvel, Crop rotation and nitrogen effects on normalized grain yields in a long-term study, AGRON J, 92(5), 2000, pp. 938-941

Authors: Wilhelm, WW Liebig, MA Varvel, GE Blackmer, TM

Citation: Ww. Wilhelm et al., Midseason stalk breakage in corn as affected by crop rotation, hybrid, andnitrogen fertilizer rate, AGRON J, 91(1), 1999, pp. 160-165