HARMFUL EFFECTS OF ALDEHYDES IN SOILS. 
Table V. — Effect of salicylic aldehyde on wheat in nutrient culture solutions composed 
'principally of nitrate. 
Composition of culture 
solution. 
P 2 5 
NH 3 
Parts per 
Parts per 
million. 
million. 

SO 

72 
8 
72 

64 
8 
64 
16 
64 

56 
8 
56 
16 
56 
24 
56 

48 
K s O 
Parts per 
million. 

8 

16 
8 

24 
16 
8 

32 
Without 
salicylic 
aldehyde. 
Green 
weight. 
Grams. 
1.80 
2.00 
1.86 
2.00 
2.50 
1.76 
2.04 
3.00 
2.24 
1.72 
2.60 
With 
salicylic 
aldehyde, 
10 parts 
per 
million. 
Green 
weight. 
Grams. 
1.31 
1.60 
1.30 
1.50 
1.84 
1.40 
1.74 
1.78 
2.04 
1.54 
1.82 
Composition of culture 
solution. 
p 2 5 
NH, 
Parts per 
Parts per 
million. 
million. 
8 
48 
16 
48 
24 
48 
32 
48 

40 
8 
40 
16 
40 
24 
40 
32 
40 
40 
40 
K 2 
Parts per 
million. 
24 
16 
8 

40 
32 
24 
16 
Without 
salicylic 
aldehyde. 
Green 
weight. 
Grams. 
3.12 
2.74 
2.34 
1.80 
2.50 
3.44 
3.00 
2.70 
2.20 
1.80 
With 
salicylic 
aldehyde, 
10 parts 
per 
million. 
Green 
weight. 
Grams. 
1.60 
1.74 
2.00 
1.56 
1.54 
2.12 
2.10 
2.10 
1.88 
1.60 
Table VI gives the effect of salicylic aldehyde in cultures, princi- 
pally potassic, similar to Table IV for the phosphate cultures and 
Table V for the nitrate cultures. 
From this table it is seen that the aldehyde cultures are much 
smaller than the normal cultures. The total green weight of the 21 
normal cultures was 47.67 grams against 33.74 grams for the cultures 
containing the salicylic aldehyde. 
Table VI. — Effect of salicylic aldehyde on wheat in nutrient culture solutions composed 
principally of potash. 
With 
With 
Composition of culture 
solution. 
Without 
salicylic 
aldehyde. 
salicylic 
aldehyde, 
10 parts 
per 
million. 
Composition of culture 
solution. 
Without 
salicylic 
aldehyde. 
salicylic 
aldehyde, 
10 parts 
per 
million. 
P2O5 
NH 3 
K 2 
Green 
weight. 
Green 
weight. 
F2O5 
NH 3 
K 2 
Green 
weight. 
Green 
weight. 
Parts per 
Parti per 
Parts per 
Parts per 
Parts per 
Parts per 
million. 
million. 
million. 
Grams. 
Grams. 
million. 
million. 
million. 
Grams. 
Grams. 


80 
1.30 
0.90 
8 
24 
48 
3.25 
2.02 

8 
72 
1.32 
1.48 
16 
16 48 
2.42 
1.90 
8 

72 
1.30 
1.14 
24 
8 48 
2.40 
1.44 

16 
64 
2.20 
1.42 j 
32 
48 
1.54 
1.15 
8 
8 
64 
2.20 
1.62 1 
1.18 

40 40 
2.50 
1.54 
16 

64 
1.46 
8- 
32 40 
3.15 
2.34 

24 
56 
2.22 
1.50 
16 
24 j 40 
3.32 
2.08 
8 
16 
56 
3.00 
2.24 
24 
16 40 
3.20 
2.05 
16 
S 
56 
2.52 
1.74 ! 
32 
8 40 
2.70 
1.70 
24 

56 
1.60 
1.10 
40 
j 40 
1.75 
1.10 

32 
48 
2.32 
1.70 
1 
The six cultures composed of approximately equal amounts of 
P 2 5 , NH 3 , and K 2 is given in Table VII. The total green weight 
of the cultures in nutrient salts without salicylic aldehyde was 18.92 
grams, and the total green weight for the cultures of similar composi- 
tion with 10 parts per million salicylic aldehyde was 12.37 grams. 
43777°— Bull. 108—14 2 
