A known weight of soil sample was oven-dried to obtain a constant weight. The loss in weight was due to
loss of
The primary purpose of oven-drying to obtain a constant weight is to remove the moisture content (water content) in the soil and then because in the soil sample we have organic matter as well which also contributes to the weight of the soil, hence we oven-dry to obtain a constant weight. This makes option C, the correct answer.
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