248 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 



Eed 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 nearlj^ 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 



