Did you read KP's pea silage thread? DDing peas into your swards could help. Use Lucerne/peas/trefoil/clovers in your silage swards?isn't us growing the rape, from what i can gather, it's a ok crop, or a write off, with not much in between !
soya is the 'ideal', and 50/50 rape soya is a very good mixture. But soya comes a long way, and grown in the wrong places, s/mkts don't like it, we have to declare how much, and where from, for our milk buyer, so soya will be 'out', rape is the next best, rape pro, can replace soya, but unless they give derogations on sprays, it isn't going to be grown in sufficient amounts, to supply the meal, it will be imported rape oil.
So, that's the riddle, to replace the best two protien sources, our cows are not high yielding, so do not require the precision rationing of the high yielding herds, where it is crucial. Just putting a 'feeler' out, you never know, someone might have found the solution, or found a way to reduce the need for rape/soya.