TY - BOOK TI - Bonn: One measure of Europe's dynamic farm establishment is rising f armland productivity as reflected in per hectare yields KW - Photography KW - Germany KW - Photos N1 - take wheat for example. During the sixties the per hectare yield of wheat fields in the nine member nations of the common arket (EEC) rose from 3.18 million tons. A the outset of the seventies it had already re ached 41.3 million tons. Top prize for raising productivity during the decade went to France, which today reaps a third more wheat per hectare (approx. 2.47 acres) than ten years ago. Wheat is mankind's most impor tant cereal and wheat comprises nearly one third of all grain crops of the world. Maize follows closely with 28 percent of the total tonnage f ollowed by rice with 20 percent, barley with 13 percent, oats with 5 pe rcent and rye with 3 percent; Paid up registered users; AR/MAKPHOTOS/36/2 ER -