396 
Journal of Agricultural Research 
Vol. XXVII, No. 6 
Table VII. Salt combinations used in series of sand cultures started on June 14 , 
to determine the relation of nutrient salts to development of stem rust 
1922 , 
Series No. 
121 , 
122 
124. 
125 
126. 
I27, 
128. 
Salt. 
Ca(N 0 3 ) 2 . 
kh 2 po 4 . 
MgS 0 4 ... 
FeS 0 4 .... 
Ca(N 0 3 ) 2 . 
kh 2 po 4 . 
MgS 0 4 ... 
FeS 0 4 .... 
k 2 hpo 4 . 
Ca(N 0 3 ).>. 
kh 2 po 4 “ . 
MgS 0 4 ... 
FeS 0 4 .... 
KN 0 3 .... 
Ca(NO,),. 
kh 2 po 4 : . 
^MgS 0 4 ... 
FeS 0 4 .... 
KN 0 3 . 
Ca(N 0 3 ) 2 . 
kh 2 po 4 . . 
^MgS 0 4 .... 
FeS 0 4 .... 
lCaHP 0 4 .. 
fCa(N0 3 ) 2 . 
CaHPO,.. 
MgS 0 4 .... 
KN 0 3 . 
FeSO,. 
Ca(N 0 3 ) 2 .. 
kh 2 po 4 . 
MgS 0 4 ... 
FeS 0 4 ... 
Ca(N 0 3 ) 2 . 
kh 2 po 4 . 
MgS 0 4 ... 
IA 1 CL .... 
Grams per 
liter. 
Gram molecules 
per liter. 
I.279 
0. 0078 
I. 471 
. 0108 
O. 361 
O. 020 
.0030 
. 0001 
I. 279 
. 0078 
I. 47I 
. 0108 
O.361 
. 0030 
O. 020 
. OOOI 
I. 882 
. 0136 
1-279 
. 0078 
1.471 
. 0108 
0.361 
. 0030 
0. 020 
. 0001 
O. 864 
.0015 
1-279 
. 0078 
1.471 
. 0108 
0.361 
. 0030 
0. 020 
. OOOI 
1.729 
. 0171 
0. 128 
. 0008 
1.471 
. 0108 
0.361 
.0030 
0. 020 
. OOOI 
2 - 943 
. 0171 
t. 279 
. 0078 
0. 294 
. 0017 
0.361 
.0030 
1.729 
. 0171 
0. 020 
. OOOI 
1.279 
. 0078 
1. 47 1 
. 0108 
0. 361 
. 0030 
0.300 
. 0007 
1.279 
. 0078 
1.471 
. 0108 
0.361 
. 0030 
1.895 
. 0171 
When the seedlings in the series of January 29 were two months old, 
in place of the regular watering with distilled water, a quantity of the 
particular salt being tested for each series was added to each crock in 
the series as follows: 
Series No. 
Salt added Apr. 1. 
102 
103 
IQ 4 
IO S 
106. 
250 cc. distilled water, no salt. 
250 cc. distilled water, containing 0.432 gm. KN 0 3 . 
250 cc. distilled water, containing 0.745 gm. MgHP 0 4 . 
250 cc. distilled water, containing 0.745 gm. K 2 S 0 4 . 
250 cc. distilled water, containing 0.363 gm. NaN 0 3 . 
250 cc. distilled water, containing 0.736 gm. CaHP 0 4 . 
