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Ch. 2: Soil Physical Properties 2.1 Important Facts to Know

Questions 1, 2, and 8; Anda. Assuming a ?s = 2.65 g cm-3 and given acylinder height (h) = 7.0 cm, inside diameter (d) = 5.5 cm, and oven-dry soil weight (Ms) = 95 gcalculate total porosity. b. Calculate the per hectare weight of soil to a depth of 10 cm for (a) above.@ 3pts = 15 ptsDue:

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Ch. 2: Soil Physical Properties 2.1 Important Facts to Know

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    1. Ch. 2: Soil Physical Properties 2.1 Important Facts to Know Soil properties that can be described by physical measurements Soil separates, textural class, and descriptive adjectives Soil structure, stability & consistency Mass/volume relationships Soil temperature and radiation Engineering terms & relationships

    2. Questions 1, 2, and 8; And a. Assuming a ?s = 2.65 g cm-3 and given a cylinder height (h) = 7.0 cm, inside diameter (d) = 5.5 cm, and oven-dry soil weight (Ms) = 95 g calculate total porosity. b. Calculate the per hectare weight of soil to a depth of 10 cm for (a) above. @ 3pts = 15 pts Due: Friday 3 September 2010

    3. 2:2 Soil Texture Coarse Fragments (>2mm) Soil Separates (< 2mm = fine earth fraction) Sands (0.05-2.0 mm); 0.05-0.10 vfs, 0.10-0.25 fs, 0.25-0.50 ms, 0.50-1.0 cos, 1.0-2.0 vcos Silts (0.002-0.05 mm) Clays (<0.002 mm) (2 µc) Soil Texture Relative proportions of sands (s), silts (si), & clays (c)

    4. Physical properties (s, si) Water intake Water holding capacity Aeration & Drainage Physico-Chemical properties (c) Fertility Surface activity Ion exchange

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