Cropping Systems and Planting Patterns: JAMB Agricultural Science Questions, Answers & Notes

What Cropping Systems and Planting Patterns covers in the JAMB Agricultural Science syllabus

Cropping systems describe how crops are grown together and over time. Monocropping (sole cropping) grows one crop — but can deplete nutrients and build up pests. Mixed cropping grows several crops together (better land use, spreads risk); intercropping arranges them in defined rows; and crop rotation grows different crops in sequence over seasons — maintaining fertility (especially with legumes that fix nitrogen) and breaking pest/disease cycles. Other systems include strip cropping (across slopes to cut erosion), ley farming (alternating crops with grass/pasture) and relay cropping (a second crop sown into a maturing first). Planting patterns concern spacing and plant population (plants per area): correct spacing reduces competition and boosts yield, and row planting eases weeding, spraying and harvesting. The aim is to maximise yield while sustaining the soil.

For Cropping Systems and Planting Patterns, JAMB expects you to be able to:

• Distinguish monocropping, mixed cropping, intercropping and crop rotation
• Explain planting patterns, spacing, plant population and row planting
• State the merits/demerits and the role of legumes and strip/ley cropping

Key facts & revision notes: Cropping Systems and Planting Patterns

These are the recurring points our Cropping Systems and Planting Patterns questions test — revise them until each feels automatic, then practise the questions above to lock them in.

• Monocropping (sole cropping) is growing a single crop on a piece of land.
• Mixed cropping grows two or more crops together on the same piece of land.
• Intercropping grows two or more crops together in a defined row pattern.
• Crop rotation grows different crops in sequence on the same land over seasons.
• Crop rotation maintains fertility (especially by including legumes) and breaks pest/disease cycles.
• Mixed cropping uses land better and spreads risk — if one crop fails, others may still yield.
• Monocropping can deplete specific soil nutrients and build up pests/diseases of that crop.
• The planting pattern is the arrangement and spacing of crops on the field.
• Proper spacing reduces competition for light, water and nutrients, improving yield.
• Overcrowding causes competition for resources, reducing growth and yield.
• Too-wide spacing wastes land and lowers the yield per unit area.
• Legumes fix nitrogen, so including them in rotation enriches the soil.
• Strip cropping grows crops in strips across a slope to reduce runoff and erosion.
• Growing the same crop continuously allows its specific pests and diseases to build up.
• Ley farming alternates arable crops with grass/pasture leys, restoring fertility and feeding animals.
• Crop rotation, especially including legumes, is effective for maintaining soil fertility.
• In relay cropping, a second crop is sown into a standing (maturing) first crop before it is harvested.
• Plant population (density) is the number of plants grown per unit area.
• Row planting eases weeding, spraying, fertiliser application and harvesting, and gives even spacing.
• Good cropping systems and patterns aim to maximise yield while sustaining the soil.

Worked examples

Three Cropping Systems and Planting Patterns questions with the answer and a short explanation, so you can see how the topic is set before you practise the full set.

How Cropping Systems and Planting Patterns is tested in JAMB Agricultural Science

Our Cropping Systems and Planting Patterns bank holds 20 questions (12 medium, 8 hard). JAMB Agricultural Science typically returns to Cropping Systems and Planting Patterns year after year, so steady practice on this topic is high-value revision. Questions are multiple-choice with four options, and at UTME pace you get roughly 40 seconds each — which is why timed practice matters.

How to answer Cropping Systems and Planting Patterns questions

Work the stem first and predict the answer before you look at the options; then eliminate the ones that contradict the key facts above. Watch for “which is not…”, “all of the above” and “except” style stems, which are where rushed candidates lose easy marks on Cropping Systems and Planting Patterns. If a calculation or a precise definition is involved, work it from first principles rather than guessing from a half-remembered rule. When two options look right, re-read the stem for the qualifier that separates them — JAMB rarely repeats an option by accident. If you are still unsure, eliminate the two weakest choices to lift your odds, flag the question, and move on; never burn a full minute on one Agricultural Science item when the exam gives you about forty seconds each. Then come back to flagged questions with whatever time remains. The single most reliable way to get faster at Cropping Systems and Planting Patterns is repeated timed practice, so use the button above until the recurring patterns feel automatic.

Common mistakes to avoid in Cropping Systems and Planting Patterns

The errors that cost marks on Cropping Systems and Planting Patterns are usually careless rather than conceptual: misreading a negative stem, confusing two similar terms, or rushing a definition you actually know. Candidates also over-rely on “expo” and last-minute cramming instead of understanding the topic — which fails the moment JAMB rephrases a familiar idea. Treat every option as a claim to be checked against the facts above, keep your working tidy for any calculation, and don’t change a considered answer on a hunch. Above all, revise Cropping Systems and Planting Patterns actively by answering questions, not just by re-reading notes — recall under time is what the exam rewards.

Frequently asked questions

Is Cropping Systems and Planting Patterns part of the JAMB Agricultural Science syllabus?

Yes. Cropping Systems and Planting Patterns is a recognised topic in the JAMB Agricultural Science syllabus, covering distinguish monocropping, mixed cropping, intercropping and crop rotation. You should be able to recall its key facts and apply them to multiple-choice questions.

How many Cropping Systems and Planting Patterns questions can I practise on Belmadeng?

There are 20 original, JAMB-standard Cropping Systems and Planting Patterns questions in our free bank, each with the correct answer and a worked explanation. You can practise them untimed or as a timed test.

What are the most important points to know about Cropping Systems and Planting Patterns?

Cropping systems describe how crops are grown together and over time. Monocropping (sole cropping) grows one crop — but can deplete nutrients and build up pests. Mixed cropping grows several crops together (better land use, spreads risk); intercropping arranges them in defined rows; and crop rotatio…

How do I answer Cropping Systems and Planting Patterns questions quickly in JAMB?

Read the stem carefully, eliminate clearly wrong options, and match the remaining choices to the key facts for Cropping Systems and Planting Patterns. Practising timed Cropping Systems and Planting Patterns questions builds the speed you need for UTME's pace of about 40 seconds per question.

Are these JAMB Agricultural Science Cropping Systems and Planting Patterns questions past questions or original?

They are original questions written to JAMB (UTME) standard and mapped to the official syllabus — not reproduced past papers. This keeps them legal to use freely while closely mirroring how the real exam tests the topic.

Where can I practise Cropping Systems and Planting Patterns questions free without signing up?

Right here — tap “Start Cropping Systems and Planting Patterns practice” on this page to begin instantly. Belmadeng's CBT practice is completely free and needs no sign-up, download or subscription.

About these questions: original, JAMB-standard items written from the official UTME Agricultural Science syllabus (last reviewed 2026-09-18). Belmadeng is an independent study platform and is not affiliated with JAMB. Spotted an error? Use the report link.