948 FORAGE CROPS 
different clovers, there were planted side by side on 
August 1, 1896, three plats of clover, one of crim- 
son, one of common red and one of mammoth. 
The soil was gravelly and porous. All varieties of 
clover came up quickly and made good growth. 
The crimson clover, however, made far more rapid 
growth in the fall than did the others. One object 
of these experiments was to determine the amount 
of nitrogen stored up by the different varieties of 
clover. On November 2, samples were taken of 
each kind of clover, the roots and tops of each 
being taken as the sample. The chemical analysis 
shows the following amount of nitrogen stored up 
in each per acre: 
Nitrogen Nitrogen Total pounds 
Kind of clover in tops in roots of nitrogen 
(pounds) (pounds) per acre 
Crimson ...... 125.28 30.66 155.94 
Red 4: 2% ee w 63.11 40.25 103.36 
Mammoth ..... 67.57 78.39 145.96 
* All clovers wintered well, but in the spring the 
freezing and thawing killed nearly all of the crim- 
son clover. It had, however, served its purpose 
as a cover-crop and for late fall pasture would 
have been valuable, leaving in the ground enough 
fertilizing material to pay for the expense of the 
seeding.” 
Yield of crimson clover 
The yield varies widely, but from good seeding 
the average of green forage should be about eight 
