Fertilisers & Plant Reproduction is one of 9 topics in the Grade 11 Agricultural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Which of the following is an example of an inorganic fertiliser?
Urea
Compost
Animal manure
Crop residues
Answer: Urea — Urea is an inorganic (mineral/chemical) fertiliser supplying nitrogen; compost, animal manure and crop residues are organic fertilisers.
Easy
2. Give the common abbreviation used to label the guaranteed nutrient percentage analysis on an inorganic fertiliser.
Answer: N:P:K — The N:P:K ratio (nitrogen:phosphorus:potassium) is commonly shown on fertiliser product labels to indicate guaranteed nutrient percentage analysis.
Medium
3. What is a key advantage of organic fertilisers over inorganic fertilisers?
They improve soil structure, organic matter content and cation exchange capacity
They release nutrients immediately in a precisely known concentration
They never require any soil testing before application
They are always cheaper than inorganic fertilisers
Answer: They improve soil structure, organic matter content and cation exchange capacity — Organic fertilisers improve soil structure, increase organic matter content and cation exchange capacity, and support soil biological activity, though they release nutrients more slowly and unpredictably than inorganic fertilisers.
