
doi: 10.1007/bf01343642
The availability of manganous oxide, γ manganese dioxide and MnEDTA was compared to that of manganous sulfate at several equivalent rates on a Mn-deficient peaty muck, marl and on Mn-sufficient Scranton sand. Tomato plants grown in pot studies were analyzed for manganese and iron. Mn-deficiency leaf symptoms were in general agreement with the manganese level in the plant and the Fe/Mn ratio. Iron intake and manganese intake showed some evidence of inverse relationships. Manganous sulfate was slightly more available than manganous oxide which, in turn, was more available than γMnO2 or MnEDTA.
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