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Crop Fertilization Based on North Carolina Soil Tests
Table 4.9  Commonly available sources of potassium (K)
% K2O
Muriate of potash (0-0-60) KCl 60–63
Potassium sulfate (0-0-50) K2SO4 50–52
Potassium nitrate (13-0-44) KNO3 44
Potassium hydroxide KOH 83
Potassium magnesium sulfate (Sul-Po-Mag) K2SO4-MgSO4 22
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