For the 5 years, I’ve planted 4-6 acres of brassicas on packed soil (and the packed again after broadcasting). I’ve also separately broadcast brassicas on field edges and thin spots in clover and corn. My experience is cultipacked planted brassicas germinated considerably quicker and grew larger (bulbs and forage). I’ve also observed that that germination rates are much higher. Hence on unprepared soil, I probably have to broadcast 2-3 times the seed to get the same production.
My property is just over 200 acres in rather unproductive mountains. Come the fall, it’s not uncommon to see 25-30 deer in the plots every evening. The deer completely polish off the forage by January or early February. They then get serious about the stalks and bulbs. If I could do it productively, I’d double the brassicas. On balance they are now a stronger draw than my corn/bean mix (beans are always gone by late fall).
If RR brassicas were a thing, that would be the backbone of my plots. For what it’s worth, I always have several acres of rye planted in the fall to keep the deer fed in March as the snow melt permits access. Around here, late February and March are the toughest months for starvation.