evaluation of the common market organisation in cereal sector national report spain julian briz catedrático de la universidad politécnica madrid contents i table case study monograph 1 overview rationale 2 structure an introduction to cereals agricultural situation castilla y león 6 3 income 8 4 general unintended effects cmo for 5 conclusions 9 producers levels changes by activity and crop planting decisions areas 10 on farm feed uses 11 quality asset value land 12 7 evolution non incomes 14 dependence direct payments 15 level effect production farming activities 16