Show Hybrid cP ii w j t u In 1645 mot mor than than 88 to million acres acres m were planted plant d iQ Q hybrid sties according to G of agriculture sine S c 1938 when 11 pet per cent s j of fit th the corn acrea acrel M T wa planted to to hybrids there th re lIa an increase each year i year ar of ot mm tT M per cent to 8 88 80 e per spot cent of or clop cloi clos to tol t l million acres In the the corn com c nl belt states tates hybrids are estimated to have bave Increased yields at l st 20 0 per cent over the pollinated open varieties |