May 25,1914 
Transformations of Soil Nitrogen 
105 
Table; I .—Effect of certain soils and combinations of salts on grapefruit seedlings grow - 
ing in greenhouse soil at the Department of Agriculture, Washington , D. C .—Con. 
Lab¬ 
oratory 
No. 
Soil treatment. 
Condition of trees after 74 
days. 
Condition of trees after 144 
days. 
780 
Cl as NaCl (0.04 per cent) + N as 
Leaves shed. 
Pew new leaves; chlorotic. 
JCNO3 (0.04 per cent). 
781 
.do. 
.do. 
Do. 
782 
CaCOa (r per cent) + Cl as NaCl 
Normal. 
Normal. 
(0.04 per cent). 
783 
. .do. 
.do. 
Do. 
784 
HCO as NaHCC>3 (0.04 per cent). 
Do. 
78s 
.do. 
.do. 
Do. 
786 
HCO3 as NaHCCb (0.04 per cent) 
Leaves shed. 
Do. 
+ N as KNO3 (o.o4percent). 
787 
.do. 
.do. 
New leaves normal. 
788 
SO4 as NasSQj (0.04 per cent) + 
Normal. 
Leaves nearly all shed. 
N as KNOa (0.04 per cent). 
789 
.do. 
.do. 
Do. 
Table II .—Effect of certain salts and combinations of salts on sour-orange seedlings 
growing in California soil at Washington , D. C. a 
Lab¬ 
oratory 
No. 
Soil treatment. 
Condition of trees 
after 26 days. 
Condition of 
trees after 46 
days. 
Condition of trees 
after 90 days. 
Check. 
Normal. 
Normal. 
Normal; growing. 
931 
Ho — T p . ., . T . 
.do. 
.do. 
Do. 
CaCC>3 (t per cent^. 
.do. 
.do. 
Do. 
yo** 
933 
HO, , - ^ - - -.T T - - -. 
.do. 
.do. 
Do. 
CaCOa (3 per cent). 
.do. 
.do. 
Do. 
934 
Hn, f _ , r _ _ . 
.do. 
Do. 
03003 (to per cent). 
.do. 
.do.. ...... 
Do. 
yo u 
0*7 
do. 
.do. 
Do. 
938 
Q 7 Q 
"NT as 1 CNO, (a .02 per cent}&. 
.do. 
Do. 
.do. 
.do. 
Do. 
yoy 
e\A A 
N as If NO* fo.04 per cent)d. 
Dead; replanted.. 
Dead. 
Dead. 
y 4 w 
OAT 
do.e. 
Normal. 
Normal. 
Subnormal. 
y 4 A 
N as KNOs (0.06 per cent)/. 
Dead; replanted.. 
Dead. 
Dead. 
y 4 ^ 
0/1 7 
dn .(7 ,... . 
.do. 
Do. 
y 4 o 
fM A 
Cl as KC 1 (0.02 per cent). 
Normal. 
Normal. 
Subnormal. 
y 44 
945 
Normal; growing. 
a Sour-orange seedlings 58 days old were transplanted into 4-incli paraffined pots containing virgin soil 
taken from 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 90 days: b 0.0018 per cent, c 0.0061 per cent. ^0.0223 per cent. « 0.0087 
per cent. / 0.0200 per cent. ? 0.0194 per cent. 
