390 
Journal of Agriculutral Research 
Vol. XXVIII, No. 4 
The 21 different molecular combinations of the three salts and the position of 
the cultures arranged in triangles are shown below. A duplicate triangle of 
cultures was conducted for each phase of growth. Since similar results were 
obtained in the duplicate cultures, the data from only one triangle for each 
phase of growth are presented here. 
IyHoP0 4 
21 
6 - 1-1 
19 20 
5-1-2 o-2-l 
16 17 18 
4-1-3 J^-2-2 4-3-1 
12 13 14 15 
3-1-4 3-2-3 3-3-2 3-4-1 
7 8 9 10 11 
2-1-5 2-2-4 2-3-3 . 2~4~2 2-5-1 
1 2 3 4 5 6 
1-1-6 1-2-5 1-3-4 1-4-3 1-5-2 1-6-1 
MgS0 4 Ca(N 0 , 3)9 
IyH 2 P0 4 — Ca(N0 3 ) — MgS0 4 
Control: 3.77 : 1.09 : 3.14 
Salt nutrition of wheat. Molecular proportions of salts. 
% 
To visualize the data and to facilitate comparisons, figures 1, 2, 3, and 4 are 
given in lieu of tables. The sizes of the circles represent the comparative yields 
HH2PO4 
Fig. 1.—Salt nutrition of wheat: Seedling ghase. Triangle 1, dry weight of tops. 
measured in terms of dry weight of tops and, for the fruiting phase, dry weight 
•of grain. The leaf colors of each of the various cultures during the seedling 
