3844 Report or THE HorricuLTURAL DEPARTMENT OF THR 
yield from boxes having 20 per ct. manure combined with com- 
mercial fertilizers. These remarks hold good also for the loose 
lettuce though not in the same degree. The loose lettuce seemed 
to be less affected by the excessive use of manure and to the eye 
the entire crop appeared more uniform and less influenced by 
the differences in the treatment of the soil than did the head 
lettuce. The head lettuce was harvested Jan. 14, when the earli- 
est maturing heads were ready to be cut. The loose lettuce was 
cut Jan. 31. 
RBSULTS AS SHOWN BY THE WEIGHTS OF THE THREB LETTUCHD CROPS. 
The average weight per plant, both of the head lettuce and of 
the loose lettuce, is shown below for each crop and each separate 
treatment. The number of plants from which the average yield 
is deduced is stated and also the ratio of that average to the 
average of corresponding untreated, or check, plants, the latter 
being always considered as a unit. It should be remembered 
that the value of the unit or check for the clay loam differs from 
that of the sandy loam with each crop; it also differs on the same 
kind of loam with the different crops. ‘ 
