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Crop Fertilization Based on North Carolina Soil Tests
Table 4.7 Commonly available sources of nitrogen (N)
% N
Ammonium nitrate NH4NO3 34
Ammonium sulfate NH4SO4 21
Ammonium thiosulfate (NH4)2SO4 12
Anhydrous ammonia NH3 82
Aqua ammonia NH4OH 20–25
Calcium nitrate Ca(NO3)2 16
Sodium nitrate NaNO3 16
Potassium nitrate KNO3 13
Nitrogen solutions varies 19–32
Urea CO(NH2)2 45–46
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