Recent research in the Delta has shown twin-row (TR) production can increase yields. TR production usually involves a twin pair of rows that are 7 ½ inches apart. Missouri on-farm research in corn showed TR yielded nearly 18 bu/ac more than single row with 38-inch rows (Table 1) and that population levels should probably be increased (Fig. 1)

Table 1. Hybrid, final plant population, moisture percent, test weight, and yield of twin-row versus single row plots (Henggeler, 2003).

Fig. 1. Yield versus plant populations for twin-row corn, also showing the yield for the historic, optimum single row population, Vanduser, MO, 2003.

The Delta Center has started new research on cotton, soybeans and corn comparing twin, narrow and regular rows. It will be done on various soils and populations, and will include both irrigation and dryland. The test will include:

2006 Field Day Report