May 35, 1914 
Transformations of Soil Nitrogen 
107 
Table; III .—Effect of certain salts and combinations of salts on grapefruit seedlings 
growing in California soil at Washington, D. C. a 
Lab¬ 
oratory 
No. 
Soil treatment. 
Condition of trees 
after 22 days. 
Condition of 
trees after 48 
days. 
Condition of trees 
after 88 days. 
892 
Check. 
Normal.. 
Normal. 
Normal • growing 
893 
.do. 
.do. 
.do. 
Do. 
894 
CaCCh (1 per cent). 
.do. 
.do. 
Do. 
895 
.do. 
.do. 
Do. 
896 
CaCOs (3 per cent). 
Do. 
897 
.do.. 
.do. 
.do. 
Do. 
898 
CaCC>3 (10 per cent). 
.do. 
Do. 
899 
.do. 
.do. 
Do. 
900 
N as KLNO3 (0.02 per cent)&. 
.do. 
Do. 
901 
.do. c . 
.do. 
Do. 
902 
N as KNO3 (0.04 per cent)**. 
Dead; replanted.. 
TlMrf . 
Dead. 
903 
.do.<..*. 
.do. 
Normal,. 
Do. 
904 
N as KNO3 (0.06 per cent)/. 
Normal. 
Dead. 
Do. 
905 
.do.ff.. 
Dead; replanted,. 
Do. 
906 
Cl as KC 1 (0.02 per cent). 
Normal. 
Normal . 
Normal; growing, 
907 
.do. 
.do. 
.do....... 
Do. 
908 
Cl as KC 1 (0.05 per cent). 
Dear!. 
Dead. 
909 
.do. 
Dead; replanted.. 
.do.... 
Do. 
910 
Cl as KC 1 (ro per cent). 
Normal. 
Do. 
911 
.do. 
.do. 
Do. 
912 
N as KNO3 (0.04 per cent) + CaCC>3 (1 
Dead; replanted.. 
.do. 
Do. 
per cent).ft 
913 
.do.*. 
Normal. 
.do. 
Do. 
914 
N as KNO3 (0.04 per cent) + CaCC>3 (3 
.do. 
.do. 
Do. 
per cent)./ 
915 
.do.ft. 
.... .do. 
Do. 
928 
N as KNO3 (0.04per cent) + CaC 03 (io 
Dead; replanted.. 
Subnormal.... 
Normal; growing. 
per cent).* 
020 
.do. 
Do. 
924 
N as KNO3 (0.02 per cent) 4 - Cl as KC 1 
Normal. 
Dead. 
Dead. 
{0.02 per cent).» 
92s 
.do. 0 . 
.do. 
.do. 
Do. 
920 
N as KNO3 (0.04 per cent) + Cl asKCl 
Dead; replanted.. 
.do. 
Do. 
(0.02 per cent).P 
921 
Normal. 
Subnormal. 
a Grapefruit seedlings 3 months old were transplanted into paraffined pots containing virgin soil taken 
near Riverside, Cal. Plants were watered with distilled water. All drainage water was caught and 
returned to each pot, thus preventing any change in salt content. 
Percentage of nitrates present after 88 days: & 0.0019 per cent. c 0.0018 per cent. d 0.0117 per cent, 
<0.0041 per cent, / 0.0200 per cent. 9 0.0205 per cent. ft 0.0223 per cent. * 0.0270 per cent. J 0.0157 per 
cent. * 0.0189 per cent. * 0.0029 per cent, m 0.0029 per cent. » 0.0023 per cent, 0 0.0044 per cent. 
P 0.0213 per cent, ff 0.0091 per cent. 
