Overseeding using the correct mixtures and machinery designed for the job is now accepted as good practice to both maintain the physical and nutritional quality of medium and long term swards.
When the sward becomes open allowing weeds and unsown species to invade overseeding will quickly check this and maintain the productivity by increasing both yield and quality.
The loss of 1 tonne DM/ha @ 11MJ/ kg DM equates to 11000 MJ. This is the difference between success and failure in production from forage.
Overseeding a sward with the correct GrassMax™ mixture will help maintain production beyond its expected life.
Trials conducted in 2014 at Hailes farm, the official DLF trials site in the UK, showed up to 16% higher yield in the first 2014 cut after overseeding in October 2013 with a mixture of five different varieties of Perennial Ryegrass in a relatively open, old grass field. Best results came from using iSeed®50 followed by non-treated seed.