102 



80 



70 



y^Extroctable 

 - [22 sulfate S 



60 



Total S 



<> 



40 

 S 

 (ppm) 



30 



20 



10 



i 



L 







50 100 150 



Horizon depth cm 



2 00 



Fig. 9. Mean distribution of total and extractable sulfate 

 sulfur in ten Florida Ultisols. 



