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An undisturbed core of soil at field capacity was taken from a field site had a...

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Chemistry

An undisturbed core of soil at field capacity was taken from afield site had a wet weight of 420 g. The following information wasmeasured in the lab. The oven dry wt of the soil = 345 g BulkDensity = 1.15 g/cm3 What is the moisture content of the soil on avolume basis (volumetric water content Theta v)

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4.3 Ratings (594 Votes)

Total volume of soil sample = initial mass of soil / density

                                    = 420 g / 1.15 g cm-3 = 365.22 cm3

Final volume of soil after oven dry = 345 g / 1.15 g cm-3 = 300.0 cm3

Volume of water in soil = initial volume of soil – final volume of soil after oven dry

                                    = 365.22 cm3 - 300.0 cm3 = 65.22 cm3

Now,

Volumetric water content = volume occupied by water / total volume of the soil sample

                                    = 65.22 cm3 / 365.22 cm3 = 0.18

Thus, Volumetric water content of given soil sample = 0.18
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