Agronomic Services

Crop Fertilization Based on North Carolina Soil Tests

List of Tables
Table 1.1 Relationship between soil test index and yield
Table 1.2 Manganese availability indices (Mn-AI) for manganese-sensitive crops
Table 1.3 Manganese availability indices (Mn-AI) for crops less sensitive to manganese
Table 1.4 Multiplication factors for converting soil test index values to a quantitative equivalent
Table 2.1 Factors for calculating lime rates
Table 2.2 Target pH based on soil class
Table 2.3 Information required to calculate lime and fertilizer rates
Table 2.4 Equations for calculating rates of P2O5 and K2O
Table 2.5 Rates of P2O5 or K2O to apply based on soil test index value and crop-specific equation
Table 3.1 Recommended fertilizer rates for lawns and ornamentals
Table 4.1 Amounts of fertilizer that provide 1.0 lb of nitrogen per 1000 ft²
Table 4.2 Nitrogen fertilizer substitutions
Table 4.3 North Carolina limestone size requirements
Table 4.4 Equivalent fertilizer rates
Table 4.5 Properties of fertilizer materials
Table 4.6 Fertilizer dilutions necessary to deliver parts per million (ppm) rates
Table 4.7 Commonly available sources of nitrogen (N)
Table 4.8 Commonly available sources of phosphorus (P)
Table 4.9 Commonly available sources of potassium (K)
Table 4.10 Commonly available sources of magnesium (Mg)
Table 4.11 Commonly available sources of sulfur (S)
Table 4.12 Commonly available sources of boron (B)
Table 4.13 Commonly available sources of copper (Cu)
Table 4.14 Commonly available sources of manganese (Mn)
Table 4.15 Commonly available sources of zinc (Zn)
Table 4.16 Commonly available sources of molybdenum (Mo)
Table 4.17 Commonly available sources of iron (Fe)
Table 4.18 Equivalent measurements
Table 4.19 Conversion factors for English and metric units
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.