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Agronomic Services

Crop Fertilization Based on North Carolina Soil Tests
Table 4.10  Commonly available sources of magnesium (Mg)
% Mg
Dolomitic lime CaMg(CO3)2 6–12
Epsom salt (magnesium sulfate) Mg2SO4 • 7H2O 10
Potassium magnesium sulfate (Sul-Po-Mag) K2SO4-MgSO4 11
Magnesium oxide MgO 50–55
Kieserti (magnesium sulfate) Mg2SO4 • H2O 18
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

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