1910] SCHREINER & SKINNER—ORGANIC SOIL CONSTITUENT 173 
CONCENTRATIONS OF P,0,+NH,+K,0 FOUND IN THE VARIOUS 
CULTURES 
As has already been stated, the solutions were analyzed every 
third day for the three component fertilizer parts, phosphate, 
nitrate, and potassium, expressed as P,O,, NH,, and K,0. The 
original concentration in these elements was in the sum total 80 
PL05 
.269 
gto ager 
O76 . 2130 2.720 3g05 2377 
2834 2.133 
4.260 2270 3470 3.240 2756 2.366 
C) * * e r e 
71 «2.850 3.194 
Log2 2.73622 2.gBo 25 8 ‘3 
4. 100 «2.230 3.100 
5590 2-102 2876 ageo 2700 ao ; ® 
O58 1.356 1209 290 2920 1.900 _ 1.497 LISé 
Fic. 6.—Green eae of wheat grown in 66 cultures with different sccecieslaae 
of P.0,, NH,, and K,0. 
parts per million. After analysis the sum total of the three com- 
ponent parts was again calculated and the average concentration 
of these three elements was ascertained for the eight periods. 
These average concentrations will be found in the diagram in 
fig. 7. In practically all cases where dihydroxystearic acid was 
Present, the concentration of the solution was not reduced as much 
as in the corresponding solution without dihydroxystearic acid, 
shown in fig. 4 of the former paper. 
