Crop Fertilization Based on North Carolina Soil Tests
Table 4.7 Commonly available sources of nitrogen (N)
Source
Formula
% 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
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
