Canary grass in silage

Have given this crop 2 bags of 18-6-12 and 2 of Sul-can in late March, grass still looks very green and am expecting to take a cut of silage from it in a fortnight before any canary grass shows its head again. Is there a test teagasc can do on a handful of grass to see if the nitrogen has gone from the stem? Or is that a sugar test I'm thinking of? Also when might I expect the canary grass to shoot out a head considering the spring we've had, will be walking the crop daily but it's hard to identify canary from other weed grasses.
MF30
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if you want to post me a sample I will do it for you
 
if you want to post me a sample I will do it for you
Thanks for the offer Ozzy, the teagasc office is only 5 mins away and I'd pop in with it if they can do it there.
Will test it later this week to see how it's shaping up, it'll be a quick operation to bale it up if nitrogen levels are safe as if the grass seeds are out it'll be back to square one again with contaminated canary silage.
MF30
 
Got grass tested today for nitrates, it's around zero on the register so good to go once weather picks up.
Sugars are noticeably higher in an afternoon sample too.
All I need now is a week of good sunshine, hardly too much to ask!
MF30
 
Putting the dung and canary grass seeds back where I got them from...
MF30
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