Calculate the mass water content o f a soil if a field moist soil sample plus ca

Question

Calculate the mass water content o f a soil if a field moist soil sample plus can weigh 248 g. the dry soil plus the can weigh 233 g , and the can weight is 135 g. If a soil at field capacity has a mass water content of 0 2 4 and a bulk density o f 1.6 g/cm'. calculate its volumetric water content. A student obtained a cylindrical core (L=10 cm. r = 3 cm) of soil from a field site. She placed the soil in a metal can. The empty can weighed 300 g and when filled with the field moist soil weighed 870 g. She put the can of soil in an oven for several days until it stopped losing weight. The weight o f the dried can with soil was 750 g. Calculate the volumetric water content (theta).

Explanation / Answer

1.

Wet mass of soil =(Wet mass of soil+can)- mass of can =248-135

Wet mass of soil =113 g

Dry mass of soil =(Dry mass of soil+can) - mass of can=233-135

Dry mass of soil =98 g

So

Mass Water content (%)=[(Wet mass-dry mass)/dry mass]*100=[(113-98)/98]*100

Mass Water content (%)=15.3 % or 0.153

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