38 BULLETIN 802, U. S. DEPAETMENT OF AGRICULTURE. 



ing tlie land to grasses and clover witli rye or oats is believed to be 

 the cheapest and best of any of the several methods practiced. 



The several types of coniferous forests, such as the tamarack 

 (Larix sp.), the northern v^hite cedar or arbor vitae {Thuja sp.), 

 and the spruce and pine (P«(7ea-Pm'M5spp.) of northern bogs, the cedar 

 {Chamaecypans sp.) and the cypress {Taxodium sp.) of coastal and 

 southeastern swamps, or the mixed type which is characterized by 

 various conifers and deciduous hardwood species, must remain at 

 present without further description. In texture and color the sev- 

 eral peat materials appear to have much in common, though they 

 are derived from the dominant species of trees representative of the 

 region. The sharper contrasts are undoubtedly^ more prominent in 

 the woody and resinous components and other plant remains, as well 

 as in the condition of their decay and in the manner of the accumula- 

 tion, that is, whether the deposits are the result of river inundation 

 or formed in isolated tracts, fed by seepage and springs, where 

 drainage features are correspondingly very different. Table I con- 

 tains the more important chemical data for a type of European 

 conifer-forest peat. 



