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Show Research Improves Average Crop Yield Cetter Machinery and Fertilizer Aid Advance Farms now art growing about i third more crops than In 1920 and getting the Job dona in about 10 per cent leu time, according to U. S. department of agriculture statistics. Several factors have made this record possible. One has been the research work of plant breeders In developing heavier yielding, hardier varieties of corn, small grains, root . . IN IQilh IT TOOK IN 1020 THESE 10 LESS FAIJM COOPS WEtlE PUO- LB00 TIME TO DIKED WITH THIS PBODUCE ' AMOUNT OF FAUM MOBE CROPS. LABOR TIME. 1 n ,r ' KlUM I FAI1M 1 '. F Lteoal labod i i' ' ' LlIMiJ TME I ' arops, legumes and vegetables. Another is the improvement in machines ma-chines that helps farmers do more work in a day. A third has been the increasing use of commercial fertilizer and a better knowledge of how to use it Even with increasing use of fertilizer, fer-tilizer, the bigger per acre yields from improved crop varieties are being obtained at the expense of the soil's plant food and organic matter supply, warns Middle West Soil Improvement Im-provement committee. "Unless this drain is offset by fertility fer-tility building practices that put back needed nutrients and replenish organic matter," the committee says, "worn out soils and lower yields will be the eventual result on millions mil-lions of farms." |