Principles of Agronomy and Crop Classification MCQs 2026

Most cereal crops belong to the family

1. A Solanaceae ✓
2. B Fabaceae ✓
3. C Poaceae ✓
4. D Brassicaceae ✓

Plant population in a field is determined mainly by seed rate, germination and

1. A Grain colour ✓
2. B Market distance ✓
3. C Row and plant spacing ✓
4. D Leaf taste ✓

Primary tillage is usually the

1. A Final harvesting operation ✓
2. B Seed grading process ✓
3. C First major soil-opening operation ✓
4. D Only pesticide mixing ✓

Economic yield is the

1. A Total rainfall ✓
2. B Soil depth ✓
3. C Harvested useful portion of a crop ✓
4. D Pesticide dose only ✓

Threshing is the operation of separating

1. A Water from soil ✓
2. B Fertilizer from bags ✓
3. C Grain from harvested plant material ✓
4. D Roots from nodules ✓

Optimum sowing time is important because it aligns crop growth with

1. A Only market holidays ✓
2. B Pesticide colour ✓
3. C Favourable weather and resource conditions ✓
4. D Tractor brand ✓

Seed treatment before sowing is commonly used to protect seed from

1. A Good germination ✓
2. B Normal rainfall ✓
3. C Seed-borne and soil-borne pests or diseases ✓
4. D Healthy roots only ✓

A cash crop is grown mainly for

1. A Only family seed storage ✓
2. B Wild grazing only ✓
3. C Sale and income generation ✓
4. D No market purpose ✓

Crop ecology studies the relationship between crops and

1. A Only market tax ✓
2. B Only storage bags ✓
3. C Their environment ✓
4. D Only legal forms ✓

Fallow land is land that is

1. A Always underwater ✓
2. B Planted every day ✓
3. C Left uncropped for a period ✓
4. D Used only for roads ✓

Indeterminate growth means a plant may continue vegetative growth while

1. A Seed remains dry ✓
2. B Roots are absent ✓
3. C Flowering and fruiting ✓
4. D Soil is removed ✓

A biennial crop normally completes its life cycle in

1. A One week ✓
2. B One day ✓
3. C Two growing seasons ✓
4. D More than ten years ✓