147 



Leaching (?) 



* This value is quite variable and has not been determined on an annual 

 basis. Nelson (1964) found an average of 10 kg/ha of S mineralized from 

 12 Mississippi soils during 6 months. 

 ** Extractable sulfate S in Florida Spodosols averaged 7 kg/ha at any one tin 



Fig. 17. Annual sources and cycling of sulfur (kg/ha/yr) in the surface 

 (0-15 cm) of a north Florida Spodosol. 



