The Duplin series consists of moderately well drained, moderately slow permeable soils that have formed in clayey Coastal Plain sediments. These upland soils have slopes ranging from 0 to 7 percent. Solum thickness is more than 60 inches. The soil is strongly acid or very strongly acid, except where limed. Where these horizons are less than 10 inches thick color values can range to 2 or 3.
Texture is sandy loam, fine sandy loam, very fine sandy loam, loam, or loamy sand.
The E horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 2 to 4. Texture range is the same as A or Ap horizon. The BE horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 4 to 8. It is loam or sandy clay loam. The Bt horizon has hue of 7.5YR to 2.5Y, value of 4 to 7, and chroma of 3 to 8.