FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5%
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25%
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50%
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75%
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Detailed explanation-1: -If the bulk density is 1.25 g per cubic centimeter, what is the percentage of soil water by volume? Hence, the % of soil moisture by weight = (mass of water in soil, g)/(mass of moist soil, g) = (40 g/135 g) x 100 % = 29.63 % (m/m).
Detailed explanation-2: -Porosity, the percent by volume of a soil sample not occupied by solids, is directly related to bulk density and particle density. If particle density remains constant, as bulk density increases porosity decreases.
Detailed explanation-3: -Particle Density = mass of dry soil / volume of soil. particles only (air removed) (g/cm3) This value will always be less than or equal to 1. Bulk Density: Mass of dry soil = 395 g. Total soil volume = 300 cm3. Particle Density: Mass of dry soil = 25.1 g. Porosity: Using these values in the equation for.