UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 802 



Contribution from tlie Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



Washington, D. C. PROFESSIONAL PAPER December 29, 1919 



QUALITY AND VALUE OF IMPORTANT 

 TYPES OF PEAT MATERIAL 



A CLASSIFICATION OF PEAT 



BASED UPON ITS BOTANICAL COMPOSITION AND PHYSICAL 



AND CHEMICAL CHARACTERISTICS 



By 



ALFRED P. DACHNOWSKI, Physiologist 

 Soil -Fertility Investigations 



CONTENTS 



Page 



The Present Status of Peat Utilization 1 



Definitions and Points of View in Classifying Peat Materials 9 



A Tentative Classification of Important Types of Peat Materials 14 



Literature Cited 39 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1919 



