432 Wisconsin Academy of Sciences, Arts, and Letters. 
The total yield per acre is heaviest in the Calamagrostis Car- 
icetum and least in the Lycopus Caricetum associations. The 
bulk of the vegetation by weight is composed of the two species 
Car ex strict a and Calamagrostis canadensis. The former con¬ 
stituted forty-three per cent according to the data for the tran¬ 
sect and the latter twenty-four per cent. Many tons of hay 
of this character are fed each year on the farms in the vicinity 
of Madison and many acres of this type of marsh land are util¬ 
ized for pasturage. When pastured heavily it is noticed that 
the sedges are rather closely cropped especially in the early part 
of the season when they develop most rapidly and there is a 
general opinion that marsh meadows afford excellent grazing. 
There seem to be no data on the digestibility oi-Carex strict a. 
Analyses by Bailer and Wilk (22) show 93.97 per cent of or¬ 
ganic substance and 6.03 per cent ash of which 1.954 is Si 0 ? . 
Storer (4) (1875) found that “bog hay” (composed of Carex 
stricta ) taken from the barn gave analyses as follows : 
Water . 8.17% 
Ash . 5.54% 
Albuminoids . 6.88% 
Carbohydrates and fats . . . ..45.99% 
Cellulose (ash free) ..33.42% 
This bog hay showed very slight differences in comparison 
with meadow hay. He also noted that bog hay collected by 
hand in June was better than that mown later due to the fact 
that Carex stricta matures early in the season. 
For Calamagrostis canadensis Jordan (6)p. 38 (1889) gives 
the results of the analysis of the water free hay as follows: Ash 
5.70 per cent; Protein 10.19 per cent; Fiber 36.32 per cent. 
He states that it is the most valuable of lowland grasses and 
his tables show that it has a per cent of digestibility greater 
than that of timothy or red top. 
Pammel (11) (1901) states that Calamagrostis canadensis 
covers a considerable area of lowland marshes in northern and 
central Iowa and is a well relished and valuable forage crop. 
The other grasses of the transect aggregate but two or three 
