20 
CoT.ORADo Experiment Station 
common enough to make it seem probable that an attempt to 
find out definitely whether this nitrate in the well-water cor- 
I'elated closely with the occurrences on the surface or not would 
^ive positive results. The method adopted was to visit ever^^ 
well in the district and take a sample of the water. It proved 
to be a someAvhat difficult matter to obtain satisfactory data 
concernin.^ these wells. The present occupants of these ranches 
often know but little about the places as they may have occupied 
them but a short time. Many of these places have changed 
hands or the occupants have changed since we began this work. 
In locating the Acells we have used the names, given in our field 
notes as the simplest system. We have given the wells along 
the public roads which gives us definite lines through the sec- 
tion. I do not see that giving the names of the occupants of 
the ranches can do any harm in this case. Some of them to 
my certain knowledge have left the places and the names serve 
no other purpose than to designate where the sample was taken 
We have given analyses of some of the soil extracts and we 
will now give the analyses of a few waters. Two of the waters 
correspond to soil extracts already given. The third one is an 
analysis of a water from a drilled well 280 feet deep, sunken in 
one of the worst places. This analysis follows: 
ANALYSIS OF WA TFR-UESIDUE, Laboratory No. 2370 
Total Solids 5328.0 p. p. m. 
Percent 
Calcic sulfate 14.584 
Magnesic sulfate 5.269 
Potassic sulfate 1.271 
Sodic sulfate 73.431 
Sodic chlorid 4.671 
Sodic silicate 0.126 
Manganic oxid (br) 0.460 
Silicic acid in excess 0.188 
100.000 
The following water was obtained from the edge of a beet 
field. The stand of beets was not jierfect but was most 
remarkably good considering the conditions. The water 
liegan to flow into the hole dug to obtain it at a depth 
of 4 feet and, though the hole was made a little over 5 feet deep, 
all of the water came in at the 4 foot point. The water-soluble 
in the surface soil of this field, sanpile taken between the rows 
of beets, not in vacant ground, yielded 7.81 percent of its air- 
dried weight to water. How the seed had germinated and the 
beets had grown are questions to be answered, but the seed had 
germinated and the beets were growing well. 
