Crop Fertilization Based on North Carolina Soil Tests
Table 4.10 Commonly available sources of magnesium (Mg)
Source
Formula
% 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
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
