22 BOTANICAL GAZETTE [JULY 
was 17.5 per cent, and in the phosphate by itself it was only ro per — 
cent. The actual decrease in concentration appears from the figures, — ‘ 
however, to be strikingly uniform, varying in the different groups — 1 
from 7 to g parts per million. This relationship of final to original | 4 
concentration, however, is not properly shown by this form of grouping — 
TABLE II 
AVERAGE GREEN WEIGHT AND CONCENTRATION OF P,O; OBTAINED IN DIFFERENT 
REGIONS OF THE TRIANGULAR DIAGRAM FIG. 9 
P20 
genie AVERAGE | RELA- etege ee 
: ae GREEN | TIVE 
CULTURE SOLUTIONS lh werent (GREEN Original] Final 
INCLUDED ppm. | p 
Three fertilizer elements, group a. 10 4.645 100°. 16-0-f 
Three fertilizer elements, group be Ir 4.120 88 26.0 | 16. 
Three fertilizer elements, group ¢ 15 3.507 75 34.0 | 24. 
‘Ewosertilizer elements... :. 18 1.531 43 <P 4070) 33 
One fertilizer element... I 648 14 30.0 oe 
Three fertilizer elements, groups — 
(2) OSS Seraran ha et 36 4.010 “3 20.6) -497% 
really an average of points varying, for instance, in the third group 
from 8 to 64 parts per million in phosphate content, giving the average 
concentration of 34 parts per million shown in the table. 
TABLE III 
AVERAGE GREEN WEIGHT AND CONCENTRATION OF NH, OBTAINED IN DIFFERENT 
REGIONS OF THE TRIANGULAR DIAGRAM FIG. 9 
AveracE NH. 
poe AVERAGE | REta- : : 
CULTURE SOLUTIONS cUL- Peace d ane ssinall Fina (Percent 
TURE Original ae 
soLurions| IN GRAMS |WEIGHT) DOD)" | yom. | 
Three fertilizer elements. group a. 10 4.645 | 100 | 32.0] 9.8 
Three fertilizer asa group i II 4-120 88 | 6.0) 74 
Three fertilizer — > group ¢. 15 3-507 15 | 225 ft 5S 
_ Two boii: — ge eee 18 29S 58 | 40.0 | 22-8 
evtilizer element) 3.6 ose. I 2.755 34. | $0.0) 70.2 
One 
Three fertilizer pro groups 
ined 
