Seeding Rate Effects on Forage Mass of Sod-Seeded Sorghum-Sudangrass.

This experiment evaluated effects of seeding rates on establishment and forage mass of sorghum-sudangrass interseeded into existing sod consisting of tall fescue, Kentucky bluegrass, white clover, and dandelion at Lincoln, NE.  The experiment was a completely randomized design consisting of 6 replications of 4 sorghum-sudangrass pure live seed (PLS) rates (0, 16, 27, and 40 PLS m^-2) and 1 unseeded, unmowed control.  The sod was mowed to a 2.5-cm stubble height before interseeding on 20 May 2016.  The unseeded, unmowed control had been mowed during the spring but was left at a 10-cm stubble height at the start of the experiment.  Plots were fertilized with 67 kg N ha^-1 on 24 June 2016 after sorghum-sudangrass emerged.