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Crop Fertilization Based on North Carolina Soil Tests
Table 4.11  Commonly available sources of sulfur (S)
% S
Sulfur S 90–100
Ammonium sulfate (NH4)2SO4 24
Gypsum (calcium sulfate) CaSO4 • 2H2O 19
Epsom salt (magnesium sulfate) Mg2SO4 • 7H2O 13
Potassium sulfate K2SO4 18
Potassium magnesium sulfate (Sul-Po-Mag) K2SO4-MgSO4 22
Superphosphate Ca(H2PO4)2 • H2O + CaSO4 12
Ammonium thiosulfate (NH4)2S2O3 26
Sulfur-coated urea CO(NH2)2-S 10
return icon.Hardy DH, Tucker MR, Stokes CE. 2014. Crop fertilization based on North Carolina soil tests. Raleigh (NC): North Carolina Department of Agriculture and Consumer Services, Agronomic Division. Circular No. 1.

Last Update January 10, 2014



NCDA&CS Agronomic Services Division, Colleen M. Hudak-Wise, Ph.D., Director
Mailing Address: 1040 Mail Service Center, Raleigh NC 27699-1040
Physical Address: 4300 Reedy Creek Road, Raleigh NC 27607-6465
Phone: (919) 733-2655; FAX: (919) 733-2837