Agricultural Officer Practice Quiz

Question 1

Which pH range is generally considered most favorable for the availability of most essential plant nutrients in mineral agricultural soils?

Accepted Answer

pH 5.5-7.0

Question 2

The primary purpose of applying agricultural lime to an acid soil is to:

Accepted Answer

Neutralize soil acidity and raise soil pH

Question 3

A soil test recommends 4 t/ha of pure CaCO3 equivalent to reach the target pH. If the farmer uses a liming material with 80% effective calcium carbonate equivalent (ECCE), what application rate is required?

Accepted Answer

5.0 t/ha

Question 4

A farmer applies the same lime rate to two acid soils with identical initial pH. Soil A has high clay and organic matter, while Soil B is sandy with low organic matter. Which statement is most accurate?

Accepted Answer

Soil A will usually show a smaller pH increase because it has greater buffering capacity

Agricultural Officer — Syllabus & notes

Exam overview