Figure 1. Locations of plant population studies conducted by Pioneer from 1987 to 2015. Not all locations were included every year.
Latitude
Figure 2. Corn yield trends for the 35º to 40º, 40º to 45º, and 45º to 50º N latitude ranges for the study years from 1987 to 2015. (Assefa et al., 2017, Crop Science Journal).
Yield Environment
Figure 3. Corn yield trend under four yield environments, low yielding (<110 bu/acre), medium yielding (110-160 bu/acre), high yielding (160-210 bu/acre), and very high yielding (>210 bu/acre) from 1987 to 2015 (Assefa et al., 2017, Crop Science Journal).
Figure 4. Proportion of corn yield environments by decade (1987-1996; 1997-2006; 2007-2015): low yielding (<110 bu/acre), medium yielding (110-160 bu/acre), high yielding (160-210 bu/acre), and very high yielding (>210 bu/acre) (Assefa et al., 2017, Crop Science Journal).
In Summary:
Author: Dr. Ignacio Ciampitti, Associate Professor Cropping Systems Specialist, Department of Agronomy, Kansas State University
Based on: Assefa Y, Vara Prasad PV, Carter P, Hinds M, Bhalla G, Schon R, Jeschke M, Paszkiewicz S, Ciampitti IA (2017) A new insight into corn yield: Trends from 1987 through 2015. Crop Sci 57:2799–2811.
The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. 1987-2015 data are based on average of all comparisons made in 161 locations through Dec. 1, 2015. Multi-year and multi-location is a better predictor of future performance. Do not use these or any other data from a limited number of trials as a significant factor in product selection. Product responses are variable and subject to a variety of environmental, disease, and pest pressures. Individual results may vary.
April 2018