146 EXPEKIMENTS UPON LEGUMINOUS CKOPS 



second twenty-five years. In fact, as is seen at the foot of the 

 table, there was an average annual produce equal to 7664 Ib. of 

 hay over the first half, but of only 3924 Ib. over the latter half 

 of the period of fifty years. 



TABLE LV. Red Clover grown year after year on rich Garden Soil, 

 Rothamsted. Hay, Dry Matter, and Nitrogen per acre, 1854-1913. 



* For the years 1854-1860, and also for 1896, the Nitrogen is estimated, but for all other years It is 

 according to direct determinations either in mixed or individual year samples. 



