. Bulletin of the Department of Agriculture. Agriculture; Agriculture. m BULLETIN No. 441 i^if^? Contribution from the Bureau of Plant Industry J? Jl\J^"^^U Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. ^^^^^U Washington, D. C. PROFESSIONAL PAPER October 27, 1916 THE ACTION OF MANGANESE UNDER ACID AND NEUTRAL SOIL CONDITIONS. By J. J. Skinner and F. R. Reid, Biochemists, Office of Soil-Fertility Investigations. CONTENTS. Introduction Effect of manganese on Arlington soil under acid conditions Oxidative power of plats with and without rnauganese under acid condi
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. m BULLETIN No. 441 i^if^? Contribution from the Bureau of Plant Industry J? Jl\J^"^^U Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. ^^^^^U Washington, D. C. PROFESSIONAL PAPER October 27, 1916 THE ACTION OF MANGANESE UNDER ACID AND NEUTRAL SOIL CONDITIONS. By J. J. Skinner and F. R. Reid, Biochemists, Office of Soil-Fertility Investigations. CONTENTS. Introduction Effect of manganese on Arlington soil under acid conditions Oxidative power of plats with and without rnauganese under acid conditions Page. 1 Page. Effect of manganese on Arlington soil imder neutral conditions 6 Oxidative power of plats with and without manganese under neutral conditions 9 Summary '. n INTRODUCTION. Investigations of the action of manganese on plants and soils have been conducted by the of Soil-Fertihty Investigations both in the laboratory and in the field for several years. Alangancse is universally found in soils and plants. Robinson/ who examined 26 American soils, found the content of manganese CMnO) to be from to j^er cent, the average being per cent, and Kelley - found in Hawaiian soils amounts varying from less than to per cent MngO.,. A number of investigators have studied the effect of manganese on plants in botli water and soil cultures, and from the evidence at hand it seems that in most cases manganese in small amounts exer- cises a stimulatijig action on growth. A general r(^view of the liter- ature? on the su])ject jias been given in former pai)eis of members of «Sullivan, M. X., and Robinson, W. O. Manganese as a fertilizer. U. S. Dept. Agr., Bur. Soils C'irc. 75, 3 p. »Kelley, W. 1'. The influence of manganese on the growth of pineapples. Hawaii Agr. Exi). Sta. Press IJul. 23,11 p., n. d. Manganese in some of its relations to the growth of pineapples. In Jour. Indus, luid Engin Chem., V. l,, p. 5.'«-i).38. 1909. Note.—Th
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