Corn Crop Curve Comparisons for the Central and Northern Plains of the U.S
1988
Stegman, E. C.
CROP curves, as originally developed for application in Kansas, Nebraska, Colorado, and North Dakota were represented as functions of a dimensionless unit; Fraction of Season (FOS) computed as the relative growing degree days from crop emergence to physiologic maturity. A high degree of commonality (Kansas vs. North Dakota) was obtained for resulting "mean curves" (Kcm type) for application to the unmodified Jensen-Haise equation. Agreement (North Dakota vs. Nebraska) was very good between "basal curves" (Kcb type) for application to a modified Penman equation. Agreement for Kcm curves (Eastern Colorado vs North Dakota) was good after the early vegetative period.
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