5^ The Colorado Experiment Station. 
help to give a fuller view of the general state of affairs in this 
section. I he soil was, of course, strongly impregnated with alkali, 
and judging from the age of the orchard that occupied it, had 
been undei cultivation for a number of years, not less than fifteen, 
and probably more than twenty. The water-soluble equalled 6.65 
percent of the air-dried soil. 
ANALYSIS 
LXIX 
Soil 
laboratory 
No. 588 
Percent 
Sand . 
Silicic acid (sol.) ... 
Sulfuric acid .... 
Chlorin. 
Phosphoric acid . 
Carbonic acid . 
Lime . 
Magnesia . 
Sodic oxid .... 
Potassic oxid .... 
Ferric oxid .... 
Aluminic oxid .... 
Manganic oxid (br.) . . 
Ignition . 
Oxygen equiv. to chlorin . 
Total . 
ANALYSIS 
LXX 
Water- 
Soluble 
Laboratory 
No. 588 
Percent 
C aleic sulfate . QO r A 
Magnesic sulfate . 
Potassic sulfate . . . 
Sodic sulfate . 
Sodic clilorid . . 
Sodic nitrate .... 
Silicic acid . 
100.000 
It is difficult to see how the drain waters from such a section, 
abounding as this has during the past year in such spots, can fail 
to be comparatively rich in nitrates. Analyses of two drain waters, 
and two seepage water were given in Bulletin 155. The two 
seepage waters were from the base of another mesa, but in this 
geneial section of country; the two drain waters were from an 
entirely different section of the country but one where similar 
conditions prevailed. We are justified by these facts in assuming 
& 
