ee oe eee 
FM ote No Aes ER re Nest eR eRe mr hae fe are 
1910] SCHREINER & SKINNER—ABSORPTION AND GROWTH 22 
In table ITI is given the same character of results as have been given 
in the preceding section for phosphate, except that the concentration 
of nitrates is considered. 
In the groups of two and single fertilizer elements, only those cul- 
tures containing nitrate are considered. In the three groups com- 
prising the three fertilizer ingredients, the percentage decrease in 
nitrate is seen to be respectively 69, 70, and 60; in the two fertilizer 
element group it is 43; and in the single element, 12. 
In table IV are given the results for the potash concentrations, 
similarly arranged and grouped as in the preceding tables. 
TABLE IV 
AVERAGE GREEN WEIGHT AND CONCENTRATION OF K,O OBTAINED IN DIFFERENT 
REGIONS OF THE TRIANGULAR DIAGRAM FIG. 9 
AVERAGE K,O 
—— AVERAGE | RELA- : 
ULTU ‘ GREEN TIVE 
CULTURE SOLUTIONS Soka : WEIGHT OREEN Original| Final —. 
INCLUDED ppm. | PPM. |emoved 
Three fertilizer elements, group a. . ie) 4.645 100 | |- 32.0 | 10.8 | 66.2 
Three fertilizer elements, group D. . II 4.120 88°) 26.9 11-3. 1 58-0 
Three fertilizer — group c.. 15 3.507 vast 22.9 | 9.6 | 58.3 
Two fertilizer elements........... 18 2.212 48 40.0 | 26.1 | 34.8 
e fertilizer shin ee I 1.106 24 80.0 4-3] 44.6 
_— —— elements, groups 
ieee Gils ie eee 36 4.010 26.6 | 10.4 | 60.9 
The percentage decrease in the cultures is for the three fertilizer 
elements in the three groups 66, 58, and 58, respectively; for the 
two fertilizer elements, 35; and for the single fertilizer element, 45. 
Influence of different amounts of P,O., NH,, and K,0O, varying, 
respectively, from 8 to 80 parts per million 
In the consideration of the results up to this point, no special dis- 
cussion has been made in regard to the actual amounts of the individ- 
ual fertilizer ingredients which were in the cultures. By reference 
to the original description of the diagram fig. 1 it will be seen, for 
instance, that there was a series of cultures in the line from number 
46 to number 55 which contained ro per cent of phosphate in the 
fertilizer mixture, or 8 parts per million of the culture solutions. Simi- 
larly, the line 37 to 45 contained 16 ppm.; the line 29 to 36, 24 ppm.; 
