Crop Fertilization Based on North Carolina Soil Tests
Table 4.11 Commonly available sources of sulfur (S)
Source
Formula
% 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
Hardy DH, Tucker MR, Stokes CE. 2013. 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
February 15, 2013
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
