WAEC Agricultural Science 2021 Question 15

Question 15

Soil Properties

In an experiment to determine the percentage of organic matter in a soil sample, the following data was collected: weight of oven-dried soil before burning = 50g. Weight of oven-dried soil after burning = 28g
Calculate the weight of organic matter in the soil.

A.11g
B.22g
C.44g
D.78g

Show the answer and explanation

Answer: B (22g)

Explanation

Organic matter burnt off = 50 − 28 = 22 g.