Just a few changes can soon add up so let's look at some figures.
Yield increase from sulphur. Applying sulphur by choosing YaraMila Extragrass (27-5-5 + 6% SO3) or YaraMila Silage Booster (20-4.5-14.5 + 7.5% SO3 + Se) rather than using an equivalent blend will give you an extra 10% yield of silage.
Yield penalty from using a blend. Trials have shown an average yield penalty of 3% from using poor quality blends.
Yield loss due to delay. Trials have shown a yield loss of 6% due to an 8 day delay in application.
So based on these figures that means almost 20% extra silage just from a few simple changes
With a second cut yield of say 6t/acre valued at £30/t this extra yield is worth around £35 per acre. But remember that 1 tonne of fertiliser will treat 5 to 6 acres (depending on application rate), so applying a YaraMila NPKS compound is worth an extra £117 - £140 per tonne of fertiliser. But don't forget because if you delay applying by more than 8 days you could end up losing £10 per acre
Or to put it another way, a blended fertiliser without sulphur would need to be £140 per tonne cheaper than the comparable Yara fertiliser for you to just break even.