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42 > Image 42 of Annual report. 1922

Part of Kentucky Agricultural Experiment Station

36 Thirty-Fifth Annual Report. withheld only a stunted growth was obtained and only a traee , was found in the tissues, whereas when manganese was added, all other conditions being the same, normal growtlrfollowed and a normal amount of manganese was found in the tissues. Manganese and iron determinations have been made in , about (it) ditferent kinds of seeds. The results show that in theieereals tested the manganese eontent is equal to the iron eontent or greater than the iron eontent, whereas in the leg- umes tested, the manganese eontent is less than the iron eon- tent. Au examination has been begun of the soils ofthe state for manganese and iron for the purpose of aseertaining if a eorrelation exists between the iron and manganese eontent of dit`t'erent types of soil. An examiuatiou has also been begun of animal tissues for manganese. So far the determination I has been made only on the brain and lung of sheep, more be- _ ` ing found in the brain than inthe lung, but in neither was the pereeutage as large as usually found in dry vegetable matter. _ Comparative Tests of Certified Strains of Seed Potatoes, l`ifty separate lots of certified Early Ohio seed from Minne- _ sota'. five of Trish (obbler from Minnesota. one from Ottawa.! (`anada, one from Kentueky, and three other strains were test- ed inthe field for relative yield and freedom from disease. A E strain of Tris_h (`obbler obtained from Minnesota in 1921 as eertitied stoek was used as a eheek at frequent intervals thru- out the plot`. , Sixty per eent of the eertitied Early Ohio strains pro- dueed yields equal to or better than the Trish (Yobbler eheek rows. This result is of signitieanee to our potato growers loeated near the (i`ineinuati markets whieh prefer a pink potato like the Early Ohio. The growers in this section were beeoni- ing diseouraged by the low yields obtained with the Early J Ohio and have been questioning whether they would not he foreed to abandon this variety in favor of some white variety. \ regardless of the market preferenees. The results in this test suggest that the low yields with Early Ohio probably lltlllf been due to the use of inferior. diseased seed stoek and that by