commiss decis april fix agro econom trend coeffici defin european size unit connect commun typolog agricultur hold eec commiss european commun regard treati establish european econom commun regard council regul eec eec june set network collect account data incom busi oper agricultur hold european econom commun amend regul eec regard council regul eec organ survei structur agricultur hold articl thereof annex iii commiss decis eec june establish commun typolog agricultur hold defin european size unit definit refer coeffici account global agro econom trend refer period coeffici calcul commiss fix consult member state consult place meet group expert typolog agricultur hold adopt decis articl agro econom trend coeffici defin european size unit provid annex iii decis eec fix trend refer period articl decis address member state brussel april commiss peter schmidhub member commiss oj oj oj oj