WAEC Agricultural Science 1996 Question 10

Question 10

Soil Properties

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%.

Show the answer and explanation

Answer: B (25%)

Explanation

Dry soil = 50 − 10 = 40 g; humus = 10 g; 10/40 × 100 = 25%.