i6o 
C. B. LIPMAN AND W. F. GERICKE 
Table V 
Antagonism Between CuCh and NaCl For Barley — Adobe Soil, Second Crop 
No. 
Added 
CuClo in 
Parts per 
Million 
IVlllllUll 
Wt. of Straw 
Wt. of 
Grain 
Wt. Dry Mat- 
ter Above 
Surface 
Wt. of 
Roots 
vv L. 01 X oiai 
Dry Matter 
cr 
&• 
g- 
&• 
cr 
&• 
cr 
&• 
cr 
&• 
I 
•o /O 
^O 
2.88 
.88 
1 76 
.88 
A f)A 
2 
•o /o 
2 8d 
4.6 
=;o 
•0" 
^ 80 
-2 
O 
•o /o 
100 
ZLO 
2.84 
zlO 
1 2A 
A 
T- 
•O /O 
100 
•T-O 
2 =;8 
•T-O 
1 01 
o 
•o /O 
I =;o 
70 
'OO 
A 0'> 
A AQ 
6 
•J /o 
I =;o 
2.82 
.s8 
1 AO 
1 QO 
7 
•3% 
200 
3.75 
•65 
4.40 
.85 
5.25 
8 
•3% 
200 
3.10 
.60 
3-70 
.60 
4-30 
9 
•3% 
250 
2.18 
.42 
2.60 
.42 
3.02 
lO 
•3% 
250 
2.65 
.95 
3.60 
•95 
4-55 
II 
.3% 
300 
2.13 
.57 
2.70 
•27 
2.97 
12 
•3% 
300 
2.30 
.40 
2.70 
.40 
3.10 
13 
•3% 
350 
3.00 
.80 
3.80 
.20 
4.00 
H 
.3% 
350 
2.49 
.66 
3-15 
.66 
3.81 
15 
.3% 
400 
1-93 
.65 
2.58 
.65 
3-23 
i6 
•3% 
400 
3-72 
.18 
3-90 
.18 
4.08 
17 
•3% 
450 
2.85 
•65 
3-50 
.65 
4-15 
i8 
•3% 
450 
2.30 
•65 
2.95 
•65 
3.60 
19 
•3% 
500 
3.10 
.85 
3-95 
•25 
4.20 
20 
.3% 
500 
2.55 
•45 
3.00 
•45 
3-45 
21 
•3% 
2.50 
•05 
2.55 
•65 
3.20 
22 
.3% 
3.10 
•95 
4-05 
•45 
4^50 
23 
2.75 
•25 
3.00 
•25 
3-25 
24 
2.15 
•25 
2.40 
•25 
2.65 
Series III 
CuCOs versus Na2C03 — Adobe Soil 
Na2C03 .3 percent constant — CuCOs varying 
Only two crops were grown in Series III. Neither as regards 
straw production nor grain production was there any strong evidence 
of antagonism between Na2C03 and CuCOa. It did seem, however, 
that the larger applications of the copper salt used showed a distirj^t 
tendency to antagonize the toxic properties of .3 percent Na2C03 in 
the soil. Contrary to the behavior of the foregoing series, the one 
here under consideration showed the small amounts of the copper 
salt to be much less effective than the larger amounts and the evidence 
seems even to point to an increase of toxicity when the copper salt in 
low concentrations is added to the sodium salt. These observations 
hold for the second as well as for the first crop, though the second crop 
cannot be seriously considered, for the same reasons that made the 
