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In an experiment to determine the percentage of humus content in a soil, the following ...

In an experiment to determine the percentage of humus content in a soil, the following results were obtained:
mass of dish = 10 gm
mass of dish and oven-dry soil = 50 gm
mass of dish and soil after heating = 40 gm
Calculate the percentage of humus in the soil sample.

A. 10 %
B. 25%
C. 60%
D. 75%
E. 80%




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