Comparison of Two Soils in Warren County, MS Michelle Bourne March 2010 SWS5716C-Pedology

Site #1- Gullied Land Site #2- Wakeland Series

Topo Map for Sites 1 & 2 Site #1- North County, First series of Loess Hills Site #2- South County, Farther into Loess hills Both are about the same distance from the MS River

Site #1 Soil map {Gu}: “Gullied land consists of loessal areas so deeply gullied that it is not practical to classify the material as soil. The gullies have cut into the unweathered loessal parent material. This land type occurs as scattered areas throughout the county, except on the flood plain of the Mississippi River. It makes up about 7% of the county.” ~Warren County, MS Soil Survey of 1964 Hilly Loess UplandsAlluvium Flood Plain Site #1

Topo Map for Site #1 Approximately 275ft. above sea level Hill ~300’ Site #1 North

Site #1 Landscape Upland, ~20% slope Elovian parent material, loess Very rapid runoff Very high erosion potential Current vegetation: bahiagrass, Kudzu, and white clover Land use: excavated for construction purposes Soil profile studied

Site #1- Gullied Land, buried soil A- 0-30cm, 10YR 3/4, silty loam, clear smooth boundary, moderate granular structure, friable C cm, 10YR 4/4, silty loam, clear smooth boundary, moderate granular structure, friable, stratifications Ab cm, 10YR 3/2, silt, clear smooth boundary, weak granular structure, very friable Ab cm, 10YR 2/1, silty loam, clear smooth boundary, weak subangular blocky structure, friable Ab cm, 10YR 3/2, silty loam, gradual smooth boundary, weak subangular blocky structure, friable C’ cm, 7.5YR 3/3, silty loam, structureless massive structure, friable A C Ab1 Ab2 Ab3 C’ Infiltration Rate- moderate Hydraulic Conductivity- moderate Available Water- High SHWT- >150cm Soil Interpretations: Dwellings with basement- severe, septic tank absorption fields- severe, local roads and streets- severe Soil Classification: Ochric epipedon, no subsurface horizon, Entisol order

Stratification of “C” Horizon Light-brown (10YR 6/6) Reddish-brown (7.5YR 5/6) Grayish-brown (10YR 3/2)

Particle Size Analysis 1) Dried soil 2) Mixing slurry 4) Reading Hydrometer 3) Acclimating to room temp

Particle Size Results HorizonWeightTempR1BlkR2% Sand% Clay% SiltTexture A Silt Loam C Silt Loam Ab Silt Ab Silt Loam Ab Silt Loam C’ Silt Loam

Site #1- Gullied Land Site #2- Wakeland Series

Site #2 Soil Map Site #2 {Wa}: “Wakeland series …friable, somewhat poorly drained soils that formed in silty material washed from the loessal uplands. These soils are on small flood plains in the loess hills and in narrow bands on the alluvial plain next to the loess hills. The surface layer… is underlain by mottled silt loam.” ~Warren County, MS Soil Survey of 1964

Topo Map for Site #1 Approximately 50ft. above sea level North Hill ~200’ Site #2

Site #2 Landscape Flood plain, nearly level slope, 0-2% Fluvial parent material, alluvium from loess uplands Slow runoff Medium erosion potential Vegetation: bahiagrass and white clover Land use: pasture Soil profile studied

Site #2- Wakeland Series Infiltration Rate- moderate Hydraulic Conductivity- moderate Available Water- High SHWT- >150cm Soil Interpretations: Dwellings with basement- slight, septic tank absorption fields- slight, local roads and streets- slight Soil Classification: Ochric epipedon, no subsurface horizon, Entisol order Ap cm, 10YR 3/3, silt, boundary, abrupt wavy boundary, moderate granular structure, friable, many earthworms and roots Ap cm, 10YR 3/4, silt, abrupt wavy boundary, moderate granular structure, friable, fewer roots C cm, 10YR 4/3, silty loam, clear wavy boundary, moderate platy structure, friable, mottles are many C cm, 10YR 3/4, silty loam, clear wavy boundary, weak platy, friable, few mottles C cm, 10YR 3/2, silty loam, clear smooth boundary, structureless massive, friable C cm, 10YR 3/4, silty loam, structureless massive, friable Ap1 Ap2 C1 C2 C3 C4

Stratification of “C” Horizon Grayish-brown (2.5Y 6/1) Reddish-brown (7.5YR 5/6) Blackish-brown (10YR 2/2) Yellowish-brown (2.5Y 6/4)

Particle Size Results HorizonWeightTempR1BlkR2% Sand% Clay% SiltTexture Ap Silt Ap Silt C Silt Loam C Silt Loam C Silt Loam C Silt Loam

Questions??