The; Colorado Kxpe;rimivnt Station. 
theknTUllt both , water ai ^, alkali ma y be quite abundant and 
ti e land still be productive. These are very undesirable conditions 
Slink VlT are C°, t S ° fatal as s °me people would have us 
from"the nitre nroh * the y const]tu te Problems distinctly different 
iTfirst thought m' and are , n0 J t 50 cIoseI y related to it as even 
of nitre showed , description of these occurrences 
" tie showed that I considered it as dependent upon a constant 
optimum supply of moisture. This condition “SrittSS 
outer edges of wet places. The nitrates do not appear where there 
n nlf TT 0f Water - 0n the other hand they are not confined 
No P 8 is W a hlC1 d re Seep6 ?’ ° f ™ hlch faCt the orch ard in question. 
Wo 8, is a good example, as is also Orchard No 7 In fact 
Orchards 1 and 2, Bulletin 155, are the only cases given in which 
an excessively wet condition of the soil was observed but no pTooer 
felt" Such The S n f T d tl ln ^ 3 depth ° f six to six and a half 
8 and the 11 H?’ V c° ndl t)°ns surrounding this orchard No. 
, and the little garden tract immediately north of it I have 
a ready stated that the soil is sandy and [he seclion at the rN« 
n , w ich piactically forms the southern boundary of the field 
shows a section of twelve to fifteen feet, the upper six or seven fert 
which is sand while the lower portion is a coarse river crave 1 
A sample of surface soil, taken two inches deep in April iqoq c av ' e 
442 percent of the air-dried soil as soluble in water Samob No 
8/5 contained 10.86 percent of salts soluble in water. P 
ANALYSES 
XXV 
XXVI 
Water-Soluble 
laboratory 
No. 772 
April, 1909 
Water Soluble 
Laboratory 
No. 875 
Nov, 1909 
Calcic sulfate . . 
Percent 
Percent 
Magnesic sulfate 
24.810 
Magnesic chlorid 
3.238 
Potassic chlorid 
15.235 
Sodic chlorid 
1.911 
Sodic nitrate . 
50.704 
Iron and Aluminic oxid 
3.944 
Sodic silicate 
0.158 
100.000 
100.000 
^ e have m Wo. 772 the nitrates equivalent to 0464 percent 
one halt tons of mtiates per acre taken to a depth of two inches or 
at the rate of nine tons per acre-foot. In No. 875 we find the 
fw^; n n ra u eqUaI 40 0424 percent of the surface soil, giviih us 
1 actically the same amount o.f nitrates per acre as No. 772. * 
