Table 3. Partial description of the Ridgebury soil series. The Ridgebury series
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Table 3. Partial description of the Ridgebury soil series. The Ridgebury series consists of very deep, somewhat poorly and poorly drained soils formed in lodgment till derived mainly from granite, gneiss and/or schist. They are commonly shallow to a densic contact. They are nearly level to gently sloping soils in depressions in uplands. They also occur in drainageways in uplands, in toeslope positions of hills, drumlins, and ground moraines, and in till plains. Slope ranges from 0 to 15 percent. Saturated hydraulic conductivity is moderately high or high in the solum and very low to moderately low in the substratum. Mean annual temperature is about 9 degrees C. and the mean annual precipitation is about 1143 mm.
TAXONOMIC CLASS: Loamy, mixed, superactive, acid, mesic, shallow Aeric Endoaquepts
TYPICAL PEDON: Ridgebury sandy loam - on a 3 to 8 percent slope in an extremely stony wooded area at an elevation of about 334 m. (Colors are for moist soil.)
A--0 to 13 cm; black (N 2/0) fine sandy loam; weak medium and coarse granular structure; friable; many very fine, fine and medium tree roots; 5 percent gravel and 5 percent cobbles; very strongly acid; abrupt smooth boundary. (5 to 25 cm thick)
Bw--13 to 23 cm; brown (10YR 4/3) sandy loam; weak medium subangular blocky structure; friable; few fine tree roots; 5 percent gravel and 5 percent cobbles; very strongly acid; abrupt wavy boundary. (8 to 22 cm thick)
Bg--23 to 46 cm; dark gray (10YR 4/1) gravelly sandy loam; massive; friable; 10 percent gravel and 5 percent cobbles; common fine prominent yellowish brown (10YR 5/6) and common medium distinct reddish brown (5YR 4/4) masses of iron accumulation; very strongly acid; gradual wavy boundary. (10 to 43 cm thick)
Cd--46 to 165 cm; gray (5Y 5/1) gravelly sandy loam; massive; firm; 10 percent gravel and 5 percent cobbles; common fine prominent reddish yellow (7.5YR 6/8) masses of iron accumulation; very strongly acid. 8
Table 4. Partial description of the Narragansett soil series. The Narragansett series consists of very deep, well drained loamy soils formed in a mantle of mediumtextured deposits overlying till. They are nearly level to moderately steep soils on till plains, low ridges and hills. Slope ranges from 0 to 25%. Permeability is moderate in the surface layer and subsoil and moderately rapid or rapid in the substratum. Mean annual temperature is about 50 oF. and the mean annual precipitation is about 47 inches.
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, active, mesic Typic Dystrudepts
TYPICAL PEDON: Narragansett silt loam - forested. (Colors are for moist soil.)
Ap--0 to 6 inches; dark brown (10YR 3/3) silt loam; weak medium granular structure; very friable; common medium roots; very strongly acid; clear wavy boundary. (4 to 10 inches thick)
Bw1--6 to 15 inches; dark yellowish brown (10YR 4/6) silt loam; weak medium subangular blocky structure; very friable; common medium roots; very strongly acid; gradual wavy boundary.
Bw2--15 to 24 inches; yellowish brown (10YR 5/6) silt loam; weak medium subangular blocky structure; very friable; common medium roots; strongly acid; clear wavy boundary.
Bw3--24 to 28 inches; yellowish brown (10YR 5/6) gravelly silt loam; weak medium subangular blocky structure; very friable; few fine roots; 15 percent gravel; strongly acid; clear wavy boundary. (Combined thickness of the Bw horizons is 16 to 34 inches)
2C--28 to 60 inches; light olive brown (2.5Y 5/4) very gravelly loamy coarse sand; single grain; loose; 45 percent gravel and cobbles; strongly acid.
48. Which soil has glacial parent material?
49. Which of the following is affected by the type of parent material?
50. Approximately how long have these soils been forming?
51. Which soil forming factors do you expect to be the similar for these two soils?
52. Which soil belongs to the order Histosols?
53. The color of the surface horizons of these two soils suggests that the organic matter content is:
54. Evidence of redoximorphic features is present in which horizon of the Narragansett soil?
Explanation / Answer
48. Which soil has glacial parent material?
Narragansett soil series soils have glacial parent material formed on till materials
49. Which of the following is affected by the type of parent material?
Ridgebury soil series formed by parent materials derived from granite, geisses and shcists.
50. Approximately how long have these soils been forming?
The soils are forming since 430,000 years. The ice core studies of Antarcitic glaciers revealed their are age is 430,000 years.
51. Which soil forming factors do you expect to be the similar for these two soils?
Glacial transport soil forming process is common in both type of soil
52. Which soil belongs to the order Histosols?
Narragansett soil series belong to the order Histosils
53. The color of the surface horizons of these two soils suggests that the organic matter content is:
These soild contain 12 to 18% organic materials
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