I’ve a low and manageable level of blackgrass on heavy land. If I put it down to NUM3 for 2 or even 3 years will I see a BG explosion? I can see a few thin stand of red clover and BG making the most of it turbo charged by the N. There’s mowing but that doesn’t seem sensible when birds are nesting and BG can head quite low. How have people managed?
Forget about ground nesting birds and top the hell out of it in year one. Add grasses like Timothy to compete with the blackgrass. Rotate it annually, growing a cover crop first then having rapid flowering species in the NUM3 to meet the late spring flowering criteria.