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PIT#5

Group #5

  A- 0- 37.5 cm; very dark brown (10YR 2/2), dry; sandy loam; fine, sub rounded, 0.3 sphericity, well sorted, mostly quartz with feldspar and other crystalline lithologies; weak, course sub angular blocky; friable, slightly sticky, non plastic; many fine vertical roots; clasts: 1-2 mm, 2%, 0.7 sphericity, no orientation, quartz with feldspar and other crystalline lithologies; no HCl reaction; gradual wavy boundary. 

  Bw1- 37.5- 87.5 cm; yellowish red (5YR 4/6), dry; loamy sand; medium, sub rounded, 0.7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; weak, course sub angular blocky; friable, slightly sticky, non plastic; common fine roots; clasts: 1-5 mm, 2%, 0.9 sphericity, no orientation, quartz with feldspar and other crystalline lithologies; no HCl reaction; clear smooth boundary.

 

  Bw2- 87.5- 115 cm; yellowish red (5YR 4/6), dry; loamy sand; medium, sub angular to sub rounded, 0.7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; weak, medium sub angular blocky; very friable, slightly sticky, non plastic; few fine roots; clasts: 3 mm average, 5%, 0.7 sphericity, no orientation, mostly quartz with feldspar and other crystalline lithologies; no HCl reaction; abrupt smooth boundary. 

 
Pit Profile #5

 

C- 115- 150 cm; strong brown (7.5 YR 4/6), dry; loamy sand; coarse, sub angular, 0.5 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; weak, coarse sub angular blocky; loose; clasts: 1-10 mm, 20%, 0.7 sphericity, no orientation, quartz with feldspar and other crystalline lithologies; no HCl reaction.

 

Conclusion

Soils on the top plain of the Hartnett study area are mapped as Hubbard loamy sand (map unit HuA, 0 to 2 percent slope) according to the Soil Survey of Dunn County, Wisconsin (Wing 1975: 27).  This is the profile that is synonymous with our pit description.  Hubbard and our profile had a Cambic Bw horizon, which is characteristic of a Hubbard loamy sand.  A defining characteristic we observed was that the soil supports pine growth, lining a western fence boundary, 20 feet west of our pit.  Our profile does have some discrepancies with the Hubbard description.  One is that we had two very different Bw layers (Hubbard only had one).  A second is that we had no acid reactions upon the adding of HCL to the soil (Hubbard has weak to medium reactions).  Hubbard soils display low natural fertility, medium water holding capacity, and high permeability on slopes from 0 to 2 percent. 

The newest classification series has renamed the Hubbard unit to Finchford loamy sand.  Characteristics of the Finchford series are thick A and C horizons, a 0 to 14 percent slope, a thin B horizon, a tendency to be excessively drained, low surface runoff, and high permeability.  This description fits our soil profile better than the old Hubbard unit.