Test Index

WAEC Agriculture 2012 Paper

Question : 6

Total: 49

Solution:

Concept:

Percentage water content is the ratio of the mass of water lost to the fresh soil mass, expressed as a percentage.

Explanation:

Mass of fresh soil sample =

180\,g

Mass of oven-dried soil sample =

120\,g

Mass of water lost =

180\,g - 120\,g = 60\,g

Percentage water content =

\left(\frac{\text{mass of water lost}}{\text{fresh soil mass}}\right) \times 100

Percentage water content =

\left(\frac{60}{180}\right) \times 100 = 33.3\%

Answer:

D. 33.3%

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