Agronomic Home
About the Division
Find Your Report (PALS)
Field Services
Nematode Assay
Plant Tissue Analysis
Soil Testing
Soilless Media Analysis
Solution Analysis
Waste/Compost Analysis
News Releases
Virtual Tour
Instructional PowerPoints
Related Sites
Agronomic Site Map

Agronomic Services

Crop Fertilization Based on North Carolina Soil Tests
Table 4.8 Commonly available sources of phosphorus (P)
%N % P2O5
Superphosphate (0-20-0) Ca(H2PO4)2 • H2O + CaSO4 0 18-20
Concentrated superphosphate (0-46-0) Ca(H2PO4)2 • H2O 0 44-52
Monoammonium phosphate (11-48-0) NH4H2PO4 11 48
Diammonium phosphate (18-46-0) (NH4)2HPO4 18 46
Ammonium polyphosphate (10-34-0) (NH4)3HP2O7  H2O 10 34
Phosphoric acid H3PO4 0 55
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