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Agronomic Responses of Corn Hybrids from Different Eras to Deficit and Adequate Levels of Water and Nitrogen

^a USDA-ARS, Lincoln, NE 68583
^b Univ. of Nebraska, Lincoln, NE 68583

View larger version (48K): [in a new window]   Fig. 1. Monthly average (a) temperature and (b) precipitation for the 1999–2002 growing seasons calculated from measurements gathered by an automated weather station (High Plains Climate Center Network, University of Nebraska) located at Shelton, NE. For comparison purposes, 30-yr averages of (a) temperature and (b) precipitation of the surrounding area are also presented.

View larger version (52K): [in a new window]   Fig. 2. Mean grain yield for 12 hybrids under a factorial combination of two water treatments (0 = deficit and 1 = adequate) and two N treatments (0 = deficit and 1 = adequate) averaged over 4 yr (1999–2002) at Shelton, NE.