July is, 1921 
Assimilation of Nutrient Salts by Corn 
57 i 
of assimilation together. The result will agree fairly well with the mean 
of the amounts of nitrogen, phosphorus, and potassium actually assimi¬ 
lated. In experiment VIII, for instance, 42.3 per cent of the roots were 
supplied with nitrogen, 27.7 per cent were supplied with phosphorus, 
and 30.1 per cent were supplied with potassium. Under the conditions 
for which the curve is valid, the assimilations corresponding to these 
fractions of the roots would be 67, 56, and 57 per cent, respectively. 
These percentages multiplied together give 21 per cent, and the actual 
F jg - i.—R elation between percentage of roots supplied with nitrogen and percentage of maximum 
absorption. 
mean assimilation in this experiment was 15 per cent of that of the 
normal or control plants. 
In Table XIX are given the actual and calculated values for the mean 
assimilations of nitrogen, phosphorous, and potassium in experiments 
where the roots were in incomplete solutions. 
The agreement between the calculated and actual values is, for the 
most part, fairly close for work of this nature. The average values for a 
general type of combination of solutions, such as two solutions lacking 
