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Image 35 of Annual report. 1923

Part of Kentucky Agricultural Experiment Station

Keutuclay Agricultural Experiment Station 29 pts and in the dark Bred district, collected in 1922, have been he analyzed, tabulated and prepared for publication. To supple- _ ment the detailed tobacco records, additional records on the ' crops were secured, during the summer of 1923, on 125 farms in the burley district and on 60 farms in the dark tired district. — The analysis of the detailed cost records on burley tobacco me showed the average cost per acre as $171.67, the highest cost ** $248.39, and the lowest cost $106.99. The average cost per pound was 16.6 cents, the highest cost 32.8 cents and the lowest cost 10.9 cents. The most important single factor affecting the cost per pound was the yield per acre, which ranged from E 252 pounds per acre on the farm having the lowest yield, to m 1,488 pounds on that having the highest yield. lr- . ‘ The average cost of dark tire cured tobacco was $73.36 to per acre, the highest cost $119.29 and the lowest $53.47. The _ average cost per pound was 10.2 cents. The cost per pound ie- on the farm having the lowest cost was 7 cents; on that having ne the highest cost, 20.7 cents. The yield per acre ranged from as 351 pounds to 1,042 pounds. V i V V Fertilizer and Rotation Tests on Tobacco. TdlC.\1lSC of ge nitrate of soda in varying amounts as applied to the produetiowi of tobacco following corn showed, in 1922, only slight increase _ in yields even from heavy applications. In 1923, applications ( ill of nitrate of soda or sulfate of ammonia supplying thirty :3); pounds or more of nitrogen per acre have given considerable increases in yields. ‘ —— In the rotation experiments. the superiority, of grass sodsn in the production of good burley leaf is outstanding. ln the 3-year rotations, root-rot has become a factor limiting yieldj i It is evident that the disease remains in the soil for at least two‘iycars after tobacco is grown, and that short rotations, at least with hurley tobacco, are not desirable unless root-rot re; sistant varieties of tobacco are used. Quality of Leaf Tobacco as Related to Chemical Characters. Ash, analyses show that barley tobacco has somewhat less _ crude ash and less inagnesiuin and silicon than black tobacco, but considerably more phosphorus, potassium and calcium; In

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