IMPOBTANT TYPES OF PEAT MATEKIAL. 
27 
Table II, — Physical characteristics of important types of peat. 
[Data from Zailer and Wilk (26-27).] 
100 parts of material. 
Specific 
Moisture free. 
Air dry, 25 
per cent of 
water content, 
absorb— 
volume 
weight of 
material 
Type of peat material. 1 
Contain — 
Absorb— 
in 1 liter. 
Organic 
matter. 
Ash. 
"Water. 
Am- 
monia. 
Water. 
Am- 
monia. 
Ash 
content. 
Weight. 
Sec. A.— Aquatic croup. 
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 
1.93 
.64 
3.21 
3.80 
.59 
10.01 
2.18 
3.44 
217 
86.02 
86.71 
13. 98 
13.29 
888.1 
871.4 
0.89 
.98 
666 
653 
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 
1,035 
841 
1.62 
.82 
260 
288 
6. Brown-moss type: 
95 
92.86 
94. 2S 
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 
2.09 
1,506.8 
887.3 
1,604.2 
1,635.5 
524.1 
1,210.3 
974.3 
456.0 
741.8 
1.22 
2.*1 
1.83 
2.64 
2.02 
2.24 
3.46 
2.30 
.97 
1,130 
665 
1,203 
1,226 
393 
908 
731 
342 
557 
.92 
1.81 
1.37 
1.98 
1.52 
1.68 
2.60 
1.73 
.73 
187 
204 
Sec. C— Bog group. 
7. Bog-moss type: 
88 
Poorly disintegrated 
113 
157 
8. Arrow-grass type: 
162 
9. Cotton-grass type: 
121 
10. Bog-shrub type: 
297 
Sec. D.— Swamp group. 
11. Alder type: 
Alnus peat; poorly disintegrated . 
12. Birch type: 
Betula peat- 
Poorly disintegrated 
242 
Partly disintegrated 
257 
... 
1 ' i " 
1 1 1 
1 Although no definite data axe at present available regarding the physical characteristics of types corre- 
sponding to the numbers 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 Scirpus spp. or the 
matted rootstocks of Juncus spp. The macerated components from 
