r n ro m 
o I he Colorado Experiment Station 
south and southwest aspect. Six years or more ago water was 
soiec m a reservoir m the northeast corner of the field My 
nfoniiation ,s that this reservoir was used for about fou,- years 
'dfilfaY 1 , >een USed W r thln the past six years ' The field was in 
trees The ^ ears . ag ®- , It , was broken U P and in 1908, set to apple 
• ie area is, I think, 20 acres, possibly more About four 
acres of the trees died. This land was‘reset in the spring of 1900 
' the area of d °f ? ”f W treeS Hved ' By ntidsuniine" of 1909 
e area ot dead trees had extended to twice its original size In 
Plate VI, lower Fig., a photograph taken Oct. 29, iqio shows 
tholes' or other w" °f ‘f* fidd , f wholly barren - not even Russian 
how in he f t r ' lg f t0 gr ° W ° n jt ' The rows ‘hat 
this seaso h, t 1 If , f T° ws betwee " tlle rows of corn planted 
is season but which did not grow. That the land lias been irri- 
&a ed tMS ?® ason and the last time, at least, with a good flow of 
furrow's 6 ^ ‘f Washing of the soiI - the bottomrfthe 
this r,- A 5 ld f from ‘his one piece of evidence most observers of 
crop and the trees would raise the question whether the land 
ad not suffered from neglect at the hands of the manager and for 
he want of water. I did not attempt to determine the depth of 
he watre table in this case as there is a deep wash at the wef 
. i< e o us nil not more than a few feet from the corner of this 
fie d and there is, at this place, no water coming in above the 
tlf 'rff 351 ’ Th ' S ] and is underlaid by a shale at varying 
rio to foffs P f rtS f 6 fie ' d i The trouble ia this case began 
] 1J1 to 1907, as I was informed, somewhere about the middle 
of the land shown in the foreground of the plate. I took a sample 
ff the surface soil in March. 1909. and another October 29 1010 
from almost the same place in the field. The former was taken to 
a depth of two inches, and the latter to a depth of four inches 
follow a " 7568 ° f the Water - soIub le Portion of the two samples 
ANALYSES T 
LXXVI 
Water-soluble 
No. 759' 'No f026 y 
Calcic sulfate .... Percent 
Magnesic sulfate ... . 1 26.940 
Potassic sulfate ... . illl 19.972 
odic sulfate .... . Q q 1-109 
odic chlorid . iaIa 43.117 
odic nitrate . . 1.661 
Ferric and Aluminic oxid' ’ ‘. 6 6.631 
Silicic acid .... . ~ on _ 0.348 
. u - 29 ° 0.222 
100.000 100.000 
