Table 9. Sulfate sulfur removed by four extraction methods 

 and percent recovery of added sulfur. 



Soil 



Depth 



Added 

 S 





Extraction i 



t± 

 nethod 





series 



A 



B 



C 



D 





— cm- 



-ppm- 







ppm . 











Myakka 



0-15 







3 



5 



2 



2 



II 



ii 



4 



7(100) 



8(75) 



2(0) 



10(200) 



1! 



ii 



8 



10(88) 



11(75) 



8(75) 



12(125) 



M 



15-30 







4 



6 



2 



2 



1! 



ii 



4 



7(75) 



8(50) 



2(0) 



8(150) 



II 



M 



8 



11(88) 



13(88) 



8(75) 



15(162) 



Kendrick 



0-15 







3 



8 



2 



2 



1! 



ii 



4 



6(75) 



9(25) 



5(75) 



8(150) 



II 



ii 



8 



10(88) 



12(50) 



8(75) 



12(125) 



II 



15-30 







4 



7 



2 



7 



II 



ii 



4 



9(125) 



10(75) 



10(200) 



15(200) 



II 



n 



8 



16(150) 



16(112) 



16(175) 



19(150) 



'A = Ca(H P0 4 ) o -2H 2 0; B = Ca(H 2 P0 4 ) 2 "H 2 + charcoal; C = 



NH,0Ac+H0Ac; D = NH.OAc+HOAc + charcoal. 

 4 4 



"^"Figures in parentheses are percent recovery of added S. 



