95 



over quite a long period, the application of green sand marls 

 constitutes quite an important contribution to the perma- 

 nent plant food supplies of the soil. 



The following are the analyses of two samples of Jgreen 

 sand marl examined in the station laboratory within the 

 past year. 



ANALYSES OF GREEN SAND MARLS. 



O 



O 



Green Sand Marl, No. 1. From Silas, Ala. 

 « « (< (1 p « (' <( 



2.24 

 2.74 



3.78 

 3.86 



Marls of this high quality can be employed to quite good 

 advantage, locally, either by direct application to the soil, 

 or in conjunction with cotton seed and stable manure in the 

 form of composts. 



MISCELLANEOUS MANUEIAL SUPPLIES. 



In addition to the above described manurial sup- 

 plies, there are other crude natural fertilizing materials 

 which are incidental to certain localities in the State. 

 Especially is this the case in North Alabama where valuable 

 deposits of bat manure have been found in a number of 

 caves. These deposits of bat excrement show considerable 

 proportions of nitrogen and fairly good proportions of 

 phosphoric acid and potash. 



The following results of analysis of several samples of 

 this material will serve to illustrate its composition and value 

 as a fertilizer. 



