A “DEFICIENCY DISEASE”

Abstract

The correction of the deficiency disease resulting from lack of available Mn in a lime-induced chlorosis is discussed and experimental data from the Rhode Island experimental plats are given. Attention is briefly drawn to the recent literature dealing with this subject. In experiments conducted in 1925 the application of 8 lb. per a. of manganous sulphate corrected the chlorotic condition of spinach and increased the yield 215%. In 1926 and 1927 absence of chlorosis and increased yields were noted with tilled crops of corn, lettuce, onions, and mangels when MnS04 was applied. Hay varieties in competition also benefited greatly, as is shown by counts made on equal strips through the treated and untreated areas. Best results were obtained when the Mn salt was applied in solution.