1. Where is the Profit? Corn on Corn vs Corn -Soybeans
SEIARA Annual Meeting
March 4, 2004

2. Corn on Corn vs. Corn on Soybeans; General Considerations
Rotation effects on yields
Rotation effects on costs of production, especially insecticides and N
Market considerations
Effects on pest cycles
Effects of the government programs

4. Continuous Corn and Corn-Soybean Tillage Study
Started in 1990
Two soil types
Kalona
Nira
Three tillage systems
No-Till
Ridge/Alternative
Chisel Plow-Disk

21. Corn on Corn vs. Corn on Soybeans; Long Term Field Studies
Rotation fertility studies from 1979
Rotations: CC, CSb, CCSb, CCCSb, Sb
4 N levels: 0, 80, 160, 240
Data from Ken Peckinovsky and Antonio Mallarino

33. Conclusions Corn yields increase for corn following any other crop
Corn/Soybean is the most profitable rotation with CCSb second under normal conditions
Significant pest pressure with more severe impact on soybean yields will influence the results
Market prices influence most profitable rotation but C/Sb still is most profitable