| Show I Manganese Found Essential to the Growth of Plants Recent research work has disclosed disclosed disclosed dis dis- closed that the element manganese is essential to plant growth and inthe in inthe inthe the nutrition of animals but it must be controlled so that excesses which are injurious to growth may not develop H H. J. J Snider assistant chief in soil experiment fields University of Illinois Illinois Illinois Illi Illi- nois college of agriculture points o out t that as soils become depleted of f their natural fertility manganese becomes available in larger r I Y Y ties and may under these conditions conditions conditions condi condi- prove injurious to crops When soils are treated with limestone the availability of manganese is greatly reduced and there may be no injurious injurious injurious in in- jurious effects on well-limed well soils However the small amounts that are required must be supplied to prevent improper development Plant leaves contain relatively large percentages of manganese while grain and seed contain comparatively comI comparatively com com- I minute quantities s It is c Ji conceivable le that deficiencies might t occur in in animals and poultry when a strict grain ration is followed to too o closely If they are allowed access to leafy plants possibilities of manganese man man- are remote This extensive research project was made possible by the de development develop develop- velo p. p ment of improved chemical methods method s for the study of manganese Snider Snide says and the results have brou brought h out the importance of this heretofore hereto hereto- heretofore fore little known trace element clement J 4 y |
