576 
The Philippine Journal of Science 
1920 
1 part KH 2 P0 4 1 part KH 2 P0 4 
Fig. 8. Diagram for series III, showing leaf injury. 
DISCUSSION OF SERIES III 
Appearance of plants . — From the data shown in fig. 8, it ap- 
pears that the area of magnesium injury on the triangular 
diagram employed for this series is very small when the amount 
of potassium chloride present is low and becomes larger as the 
