Tightarse alert....
Can you get away with not using fert ?
Does it matter if volunteers aren't sprayed off, sheep will eat them anyway ?.
At £60 / acre there's not going to be much money in it with tack sheep ?
No fert = less than half the yield.
Volunteers provide early season crop competition. The spray is only about £6/acre.
Would you buy a nice car and fit bald tyres to it?