Root veg and nitrogen

I'm just planning my veg beds for next year, and I was going to put my root veg where my "leafs and beans" were this year. I remember reading that they will have left nitrogen in the soil which some crops like and some don't. Will the root veg like the nitrogen or should i put somethng else in that bed?

 

I try, but don't always manage, to follow legumes with brassicas as brassicas are particularly nitrogen hungry and root crops less so.