here is facts about rape pollen. Values are good.Also from rape.
Rape field is dangerous to small colonies because bees fill combs in few days and then they swarm. If they do not swarm, pollen and nectar stuck brood cells and queen has not enough to lay.Nice link Finman,I have a book on honey from Rape,I plan on using 2 or 3 hives for rape honey next year to see if I can get a fast buildup.
Do I take the strongest colonies or a couple of weaker ones ?