150 STORRS AGRICULTURAL EXPERIMENT STATION. 



cord. The complete chemical fertilizer on plot K was applied 

 in 1899 and 1900 at the rate of 1,200 pounds per acre, the 

 materials included in the fertilizer being mixed in the fol- 

 lowing proportions: Nitrate of soda 200 pounds, sulphate of 

 ammonia 100 pounds, tankage 200 pounds, muriate of potash 

 200 pounds. South Carolina acid phosphate 500 pounds. In 

 1 901 the fertilizers were mixed in the same proportions as 

 above but only 800 pounds per acre were applied. On plot L 

 12 tons, or 5I3 cords, of stable manure per acre were applied 

 in 1899 and 1900; in 1901 the quantity was reduced to 8 tons 

 or 3.4 cords per acre. 



Plot M receives no fertilizer, but whenever practicable some 

 leguminous crop is grown on the plot between the seasons of 

 the regular crops, from year to year, for the purpose of plow- 

 ing under. Clover was grown after the corn crop of 1899 and 

 was plowed under in the spring of 1900. Winter vetch was 

 sown in September, 1900, after the potatoes were harvested; 

 this made a thin growth and was only 3 to 4 inches high when 

 winter came, and a considerable amount of it was killed during 

 the winter. There was, therefore, only a light growth of vetch 

 to plow under in May, 1901, in connection with the experiment 

 here reported. 



On plots N and P a mixture of South Carolina acid phos- 

 phate and muriate of potash is applied at the rate of 700 pounds 

 per acre, the proportion being 500 pounds of the former to 200 

 pounds of the latter. In addition to this, green crops grown 

 between the seasons of the regular crops are also plowed under. 

 Rye was grown on plot N after the corn crop of 1899 and was 

 plowed under before the regular crop of 1900 was planted. 

 Rye was sown again after the potato crop of 1900 was har- 

 vested, and the growth was plowed under in May 1901 before 

 the experiment of that year. On the plot P clover was grown 

 after the corn crop of 1889 and plowed under in the spring of 

 1900. Winter vetch was sown in September 1900 after the 

 potatoes were harvested and was plowed under in May 1901, 

 but as in the case of plot M there was only a light growth of 

 vetch in the fall and much of it was killed during the winter, 

 so that there was but little to plow under. 



