MASS. EXPERIMENT STATION BULLETIN 204. 



Table I. — Rainfall in Inches. 



1 Eight inches the 13th and 14th. 



Black-face type shows a rainfall much less than normal. It may be noted that from 1907 to 

 1913 there was a period of deficient rainfall, and the soil grew drier and drier each succeeding year . 

 A short period of spring or summer drought during these years was responsible for pronounced 

 ill effects from the sulfate of ammonia, although the liming of one-half the area conceals the 

 injury in the averages. The period following, as a whole, had a high rainfall, and to.xic effects 

 from the ammonia salt were not noticeable on the unlimed area. In 1918 another period of low 

 rainfall occurred, running over into the spring of 1919, when corn was particularly affected by 

 the sulfate of ammonia on the unlimed sections of plots 5 and 6, as described in detail toward 

 the end of this bulletin. 



