Geological Surveys of Kentucky and Arkansas. 245 
month at a temperature about that of summer heat.” The 
matters thus dissolved were then analyzed as usual. These 
results have this value, they show that the water of the soil is 
capable of dissolving all the elements of the food of plants. 
They furnish moreover a rough comparative view of the availa- 
ble matters in different soils. Beyond this we cannot attach any 
value to them. 
€ nov 
embodied in the above quotation, and repeated on p. 80 of the 
4th Ky. Rep., viz: its power of indicating “the suitability of 
m the soil of one or more of the eleven elements determined by 
here made unqualifiedly, were intended to be understood with a 
large amount of reserve and su 10 : 
erwise we must regard them quite unjustified, if not absurd. 
The chemical analysis of soil reveals nothing as to its tenacity or 
the i i ticular crop. e best grass 
adaptation of a soil for any par Pp. ough it would 
lands are not the best wheat lands—and alt 
ses and on the extensive agricultural 
sis : 37 d Ag. Societ 
Statistics gathered in late years by the ee) ri sian of the . 
ans. Highland and Ag. Soc., 1861, p. 568. 
comparing aaraouht of matters removed from an a 
by the wheat and ha crops, we find that the latter requires . 
: : h, lime and sulphuric acid; twice as muc 
Silica and o jtrogen. : ; . 
AY i ls that oats are raised on soils ger: ae oe 
ered too poor for the profitable production of wheat, an 
