THE CLARKSVILLE SILT LOAM. 11 



and Kentucky give yields of 12 to 20 bushels per acre, and even 

 the latter yield is not infrequently exceeded. Since the winter 

 wheat is harvested before there is any serious difficulty with summer 

 drought, it is better suited to production upon the Clarksville silt 

 loam than is the corn crop. The use of phosphatic fertilizers in 

 connection with wheat growing on the Clarksville silt loam is uni- 

 versally accompanied by a paying increase in the yield. 



Oats are generally raised, particularly at the higher altitudes, as 

 a small grain crop. The yields in Arkansas will average about 15 

 to 20 bushels per acre; in the majority of Kentucky areas from 

 15 to 25 bushels; and in Tennessee from 20 to 35 bushels upon the 

 general run of the type. Again the western Tennessee and Ken- 

 tucky areas considerably exceed these yields. 



The Claries ville silt loam is one of the most valuable soil types for 

 the production of the dark export tobacco. A large acreage of 

 this soil type is annually planted to tobacco in the western Tennessee 

 and Kentucky counties which border the line between the two 

 States. In fact the Clarksville silt loam is preferred for the pro- 

 duction of this tobacco above all other soils of the section. The soil 

 seems to possess the requisite physical and chemical properties; 

 it retains an adequate supply of moisture; and it is sufficiently 

 fertile to give not only good yields, but also the desired texture and 

 quality of leaf. In this general region also the excellent natural 

 drainage assists, both in the preparation and the tillage of the soil 

 and in the production of a uniform even growth. The average 

 yield of tobacco over many thousands of acres in the Clarksville 

 district is uniformly about 800 to 900 pounds per acre. Larger 

 yields are not infrequently produced, but can not be said to be 

 common. The extension of the cultivation of tobacco of this charac- 

 ter upon the Clarksville silt loam need only be dependent upon 

 economic conditions. 



Cotton is only produced upon the Clarksville silt loam at the 

 lower altitudes in the most southern regions of its occurrence. In 

 northern Alabama the average yield is probably about one-fourth 

 bale per acre, and only a limited acreage is grown. It would scarcely 

 seem desirable to extend this acreage, since better cotton soils under 

 more favorable climatic surroundings are available. 



Fruit crops. In the Ozark region of southern Missouri and north- 

 ern Arkansas considerable areas of the Clarksville silt loam have 

 been planted to apple orchards during the last 10 or 15 years. In 

 fact, two northwestern counties of Arkansas are said to contain 

 more apple trees than any other similar area in the United States. 

 For the proper establishing of an apple orchard upon the Clarks- 

 ville silt loam it is necessary to secure a situation in which suitable 

 air drainage prevails and where the water drainage both over the 



