. The isolation of harmful organic substances from soils. WASHINGTON: GOVERNMENT PRINTING OFFICE. 1909. LETTER OF TRANSMITTAL U. S. Department of Agriculture, Bureau of Soils,Washington, D. C, May 14,: I have the honor to transmit herewith the manuscript of atechnical paper entitled, The Isolation of Harmful Organic Sub-stances from Soils, by Oswald Schreiner and Edmund C. Shorey, ofthis Bureau. This article is the result of a study of several unproduc-tive soils, and deals with the properties of crystalline bodies isolatedtherefrom. The material throws considerable additional light up
. The isolation of harmful organic substances from soils. WASHINGTON: GOVERNMENT PRINTING OFFICE. 1909. LETTER OF TRANSMITTAL U. S. Department of Agriculture, Bureau of Soils,Washington, D. C, May 14,: I have the honor to transmit herewith the manuscript of atechnical paper entitled, The Isolation of Harmful Organic Sub-stances from Soils, by Oswald Schreiner and Edmund C. Shorey, ofthis Bureau. This article is the result of a study of several unproduc-tive soils, and deals with the properties of crystalline bodies isolatedtherefrom. The material throws considerable additional light upon the ques-tion of soil fertility. The manuscript has been gone over carefullywith Assistant Secretary Hays, who concurs in my recommendationfor its publication as Bulletin No. 53 of the Bureau of , Milton Whitney, Chief of James Wilson, Secretary of Agriculture. CONTENTS. Page. The presence of harmful substances 5 Statement of problem 8 Sources of the organic matter of soils 9 Effect of certain organic compounds on plantsisolationofharmf53schr
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