10 BOTANICAL GAZETTE [JULY 
General behavior of the cultures containing different 
ertilizer ratios 
The plants in the different cultures prepared as described in the 
previous section show some marked differences almost from the 
very outset. After several changes of solution have been made, these 
differences become quite prominent. The most marked of these is 
P2095 
48 
1.088 3.723 4.563 4.622 3.678 
@ e s s 
3.176 $4,502 4216 4363 
e ° e e 
1126 3586 4454 
e 
4.540 4.962 2.526 3.272 
° e s * 
1.029 3.234 3750 4.140 5.241 4.532 4.212 3.506 
a e e ° ° ° e 
3.37! 3-791 =004 ose ae —- _ mr wed 
2914 3.584 3410 3.860 3683 3.323 3.340 3213 3.300 
K,0 is Nia 
Fic. 3.—Green weight of 10 wheat plants grown in 66 cultures with different 
ratios of P,O., NH;, and K,0. 
that the solutions containing only oneortwoof the fertilizer ingredients, 
i.e., the entire periphery of the triangle, show a markedly less develop- 
ment of the plants than the cultures in the interior of the triangle 
wherein the three elements are combined. In other words, even the 
addition of only ro per cent of the third element to mixtures of the 
other two produces a very appreciable increase in plant growth. 
This effect is most noticeable in the change from no nitrate to 10 per 
= 
OO ae OEE ee RE ee Tee oe ee 
POR OSS A PET a OD ee ee pe SM Wage Ri eer) ee in eee ee Sr) pi he ak Seen oem: en A ae ai ae orn oe ee fer es 
pee ee 
; 
2 
’ 
‘ 
; 
