IMPORTANT TYPES OF PEAT MATERIAL. 



Table II. — I'hijxieal characteristics of important types of peat. 

 [Data from Zailer and Wilk (26-27).] 



27 





100 parts of material. 



Specific 





Moisture free. 



Air dry, 25 



percent of 



water content, 



absorb — 



volume 

 ■weight of 

 material 



Type of peat material.' 



Contain— 



Absorb— 



in 1 lilL-r. 





Organic 

 matter. 



Ash. 



Water. 



Am- 

 monia. 



Water. 



Am- 

 monia. 



Ash 

 content. 



Weight. 



Sec. A.— Aquatic proup. 















Per ct. Grams. 

































Sec. B.— Marsh group. 

 4. Reed-grass type: 















14.65 

 11.80 

 10.46 



3.84 

 3.97 

 3.51 



7.61 

 5.73 

 3.32 



1.03 



.64 



3.21 



3.80 



.59 



10.01 



1.60 



2.18 

 3.44 



217 



Poorly disintegrated 



Partly disintegrated 



86.02 

 86.71 



13.98 

 13.29 



888.1 

 871.4 



0.89 

 .98 



666 

 663 



0.67 

 .74 



277 

 417 



5. Sedge type: 



221 





98.27 

 96.03 



1.73 

 3.97 



1,379.8 

 1, 122. 4 



2.16 

 1.09 



1,0.35 



841 



1.62 

 .82 



260 





288 



6. Brown-moss t\ pe: 



95 





92.86 

 94.28 



97.92 

 99.38 

 95.87 



96.16 



99.46 



89.99 



98. 35 

 97.91 



7.14 

 5.72 



2.08 



.62 



4.13 



3.84 



.54 



10.01 



1.65 

 2.09 



1,.506.8 

 887.3 



1,604.2 



1,635.5 



524.1 



1,210.3 



974.3 



456.0 



564.5 



741.8 



1.22 

 2.^1 



1.83 

 2.64 

 2.02 



2.24 



3.46 



2.30 



3.83 

 .97 



1, 130 

 065 



1,203 



1,226 



393 



908 



731 



342 



424 

 557 



.92 

 1.81 



1.37 

 1.9S 

 1.52 



1.68 



2.60 



1.73 



2.87 

 .73 



187 





204 



Sec. C— Bog group. 

 7. Bog-moss type: 



88 



Poorly disintegrated 



113 

 157 



8. Arrow-grass type: 



102 



9. Cotton-grass type: 



121 



10. Bog-shrub type: 



Heath peat 



297 



Sec. D.— Swamp group. 



11. Alder type: 



Alnus peat; poorly disintegrated . 



12. Birch type: 

 Betula peat- 

 Poorly disintegrated 



287 

 242 





257 





1 





1 







! ' : 







i 1 " 1 1 1 





1 Although no definite data are at present available regarding the physical characteristics of types corre- 

 sponding to the numl)ers 1, 2, 3, 13, and 14, the designations of those types are here retained in order to show 

 their relationship in the classification. 



SEDGE TYPE. 



" Carex peat," " Seggentorf." 



{a) Light-brown or reddish to dark-brown, fibrous, felty peat 

 material, mainly composed of finely fibrous roots and pustulate root- 

 lets of sedges {Carex spp.) ; more or less uniform in appearance and 

 compact, though porous; often recognized by the presence of the 

 coarser fragments of (triangular) sedge culms; occasionally present 

 are the plant remains and sheathed culms of Scirjnts spp. or the 

 matted rootstocks of J uncus spp. The macerated components from 



