What are the three primary macronutrients essential for plant growth, commonly represented by the NPK ratio on fertilizers

Nitrogen, Phosphorus, and Potassium

Agriculture Science MCQs 2026

36 questions with detailed answers · 0 from past papers · 4 quiz batches available

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Page 1 of 1 Questions 1–10 of 36

Q1 medium

What is the term for the practice of growing a single crop repeatedly on the same land, without rotation
1. A Monoculture
2. B Polyculture (the opposite practice - growing multiple crop types together)
3. C Crop rotation (a different, alternating practice)
4. D Intercropping (a different, simultaneous multi-crop practice)
💡 Explanation:
Monoculture refers to growing a single crop repeatedly on the same land without rotation.
Q2 medium

What is the term for the practice of alternating different crops on the same land across growing seasons, to maintain soil health
1. A Monoculture (the opposite practice - repeatedly growing the same crop)
2. B Crop rotation
3. C Polyculture (a related, but distinct practice - growing multiple crops simultaneously)
4. D Fallowing (a related, but distinct practice - leaving land unplanted temporarily)
💡 Explanation:
Crop rotation involves alternating different crops on the same land across growing seasons to maintain soil health.
Q3 medium

What is the term for growing two or more different crops simultaneously on the same field
1. A Monoculture (the opposite practice - growing only a single crop)
2. B Crop rotation (a related, but distinct, alternating practice)
3. C Intercropping (Polyculture)
4. D Fallowing (a different practice - leaving land unplanted temporarily)
💡 Explanation:
Intercropping (polyculture) involves growing two or more different crops simultaneously on the same field.
Q4 medium

What is the term for leaving agricultural land unplanted for a period, allowing it to naturally restore fertility
1. A Monoculture (a different practice - repeatedly growing the same crop)
2. B Crop rotation (a different, alternating-crop practice)
3. C Intercropping (a different, simultaneous multi-crop practice)
4. D Fallowing
💡 Explanation:
Fallowing involves leaving agricultural land unplanted for a period, allowing natural restoration of soil fertility.
Q5 medium

What are the three primary macronutrients essential for plant growth, commonly represented by the NPK ratio on fertilizers
1. A Nitrogen, Phosphorus, and Potassium
2. B Nitrogen, Phosphorus, and Calcium (Calcium is not part of the core NPK designation)
3. C Carbon, Phosphorus, and Potassium (Carbon is not part of the core NPK designation)
4. D Nitrogen, Oxygen, and Potassium (Oxygen is not part of the core NPK designation)
💡 Explanation:
The three primary macronutrients for plant growth, represented by the NPK ratio, are Nitrogen, Phosphorus, and Potassium.
Q6 medium

What essential plant nutrient primarily supports leafy green growth and overall plant vigor
1. A Nitrogen
2. B Phosphorus (primarily supports root development and flowering)
3. C Potassium (primarily supports overall plant health and disease resistance)
4. D Calcium (supports cell wall structure, a secondary nutrient)
💡 Explanation:
Nitrogen primarily supports leafy green growth and overall plant vigor.
Q7 medium

What essential plant nutrient primarily supports root development and flowering/fruiting
1. A Nitrogen (primarily supports leafy growth)
2. B Phosphorus
3. C Potassium (primarily supports overall plant health and disease resistance)
4. D Calcium (supports cell wall structure, a secondary nutrient)
💡 Explanation:
Phosphorus primarily supports root development and flowering/fruiting processes in plants.
Q8 medium

What essential plant nutrient primarily supports overall plant health, disease resistance, and water regulation
1. A Nitrogen (primarily supports leafy growth)
2. B Phosphorus (primarily supports root development and flowering)
3. C Potassium
4. D Calcium (supports cell wall structure, a secondary nutrient)
💡 Explanation:
Potassium primarily supports overall plant health, disease resistance, and proper water regulation within plants.
Q9 easy

What is the term for the science and practice of cultivating soil, growing crops, and raising livestock
1. A Agriculture
2. B Horticulture (a narrower, related field, focused specifically on garden crops/plants)
3. C Aquaculture (a different, related field, focused on farming aquatic organisms)
4. D Sericulture (a different, narrower field, focused specifically on silk production)
💡 Explanation:
Agriculture is the broad science and practice of cultivating soil, growing crops, and raising livestock.
Q10 medium

What is the term for the specific branch of agriculture focused on cultivating fruits, vegetables, and ornamental plants
1. A Agriculture (the broader field)
2. B Horticulture
3. C Aquaculture (a different field, focused on farming aquatic organisms)
4. D Sericulture (a different, narrower field, focused specifically on silk production)
💡 Explanation:
Horticulture is the specific branch of agriculture focused on cultivating fruits, vegetables, and ornamental plants.
Q11 medium

What is the term for the practice of farming aquatic organisms, such as fish and shellfish, for food
1. A Agriculture (the broader field, primarily focused on land-based farming)
2. B Horticulture (a different field, focused on fruits/vegetables/ornamentals)
3. C Aquaculture
4. D Sericulture (a different, narrower field, focused specifically on silk production)
💡 Explanation:
Aquaculture is the practice of farming aquatic organisms, such as fish and shellfish, for food.
Q12 hard

What is the term for the practice of raising silkworms specifically for silk production
1. A Agriculture (the broader field)
2. B Horticulture (a different field, focused on fruits/vegetables/ornamentals)
3. C Aquaculture (a different field, focused on farming aquatic organisms)
4. D Sericulture
💡 Explanation:
Sericulture is the specific practice of raising silkworms for silk production.
Q13 medium

What is the general term for the broader science of crop production and soil management, encompassing various agricultural practices
1. A Agronomy
2. B Soil science (a narrower, related field, focused specifically on soil)
3. C Horticulture (a narrower, related field, focused specifically on garden crops/plants)
4. D Botany (a broader, related field, focused on plant biology generally)
💡 Explanation:
Agronomy is the broader science of crop production and soil management, encompassing various agricultural practices.
Q14 medium

What is the term for pest control approaches that combine multiple strategies, including biological, cultural, and minimal chemical methods, to manage pests sustainably
1. A Integrated Pest Management (IPM)
2. B Chemical pest control (a narrower, single-strategy approach relying primarily on synthetic chemicals)
3. C Organic pest control (a related, but narrower approach, specifically avoiding synthetic chemicals)
4. D Biological pest control (a narrower, single-strategy approach, one component often used within IPM)
💡 Explanation:
Integrated Pest Management (IPM) combines multiple strategies, including biological, cultural, and minimal chemical methods, for sustainable pest control.
Q15 medium

What is the term for irrigation methods that spray water over crops in a manner similar to natural rainfall
1. A Drip irrigation (a different, more targeted, water-efficient method)
2. B Sprinkler irrigation
3. C Furrow irrigation (a different method, using channels between crop rows)
4. D Subsurface irrigation (a different method, delivering water below the soil surface)
💡 Explanation:
Sprinkler irrigation sprays water over crops in a manner similar to natural rainfall.
Q16 medium

What is the term for irrigation methods that deliver water directly to plant roots through a network of tubes and emitters, minimizing water waste
1. A Drip irrigation
2. B Flood irrigation (a different, less water-efficient method)
3. C Sprinkler irrigation (a different, moderately water-efficient method)
4. D Furrow irrigation (a different, less water-efficient method)
💡 Explanation:
Drip irrigation delivers water directly to plant roots through tubes and emitters, minimizing water waste compared to other methods.
Q17 medium

What historical agricultural period, beginning in the mid-20th century, involved major increases in crop yields through improved seed varieties, fertilizers, and irrigation
1. A Agricultural Revolution (a broader, earlier historical shift to farming generally)
2. B Green Revolution
3. C Industrial Revolution (a broader, different historical economic/technological shift)
4. D Digital Revolution (a much later, technology-focused shift, unrelated to this agricultural context)
💡 Explanation:
The Green Revolution, beginning mid-20th century, involved major crop yield increases through improved seeds, fertilizers, and irrigation.
Q18 medium

Who is often credited as a key figure in the Green Revolution, known for developing high-yield wheat varieties
1. A Norman Borlaug
2. B Gregor Mendel (an earlier scientist, foundational to genetics, but not this specific Green Revolution role)
3. C Charles Darwin (an earlier scientist, foundational to evolution theory, but not this specific Green Revolution role)
4. D Luther Burbank (a related agricultural scientist, known for plant breeding, but not primarily credited with this specific role)
💡 Explanation:
Norman Borlaug is often credited as a key figure in the Green Revolution, particularly for developing high-yield wheat varieties.
Q19 medium

What is the term for crops that have been genetically modified to be resistant to specific herbicides or pests
1. A Genetically Modified (GM) crops
2. B Organic crops (the opposite category - grown without synthetic genetic modification/inputs)
3. C Heirloom crops (relates to traditional, non-hybrid varieties, a different concept)
4. D Hybrid crops (a related, but distinct concept - crossbreeding rather than direct genetic modification)
💡 Explanation:
Genetically Modified (GM) crops have been altered to be resistant to specific herbicides or pests through direct genetic modification.
Q20 medium

What is the term for agricultural practices that avoid synthetic pesticides, fertilizers, and genetically modified organisms
1. A Organic farming
2. B Conventional farming (the opposite, typically more input-intensive approach)
3. C Industrial farming (a related, but distinct term, often associated with large-scale conventional practices)
4. D Genetically Modified farming (the opposite approach - relies on GM techniques)
💡 Explanation:
Organic farming avoids synthetic pesticides, fertilizers, and genetically modified organisms in agricultural practices.
Q21 medium

What is the general term for the science and practice of managing soil to optimize plant growth and health
1. A Soil science (Pedology/Edaphology)
2. B Agronomy (a broader, related field, encompassing crop production generally, of which soil science is a component)
3. C Horticulture (a narrower, related field, focused specifically on garden crops/plants)
4. D Botany (a broader, related field, focused on plant biology generally)
💡 Explanation:
Soil science (pedology/edaphology) is specifically focused on managing soil to optimize plant growth and health.
Q22 medium

What is the term for the process of introducing beneficial insects to control pest populations naturally, part of integrated pest management
1. A Biological control
2. B Chemical control (relies on synthetic pesticides, a different approach)
3. C Mechanical control (relies on physical methods, a different approach)
4. D Cultural control (relies on farming practice adjustments, a different, though related, approach)
💡 Explanation:
Biological control involves introducing beneficial insects or organisms to naturally control pest populations.
Q23 medium

What is the term for farming practices that minimize soil disturbance, such as no-till or reduced-till farming, to preserve soil structure and reduce erosion
1. A Conservation tillage
2. B Conventional tillage (the opposite, more soil-disturbing approach)
3. C Deep tillage (a different, more intensive soil-disturbing approach)
4. D Crop rotation (a related, but distinct practice, focused on alternating crops rather than tillage methods)
💡 Explanation:
Conservation tillage practices, like no-till farming, minimize soil disturbance to preserve soil structure and reduce erosion.
Q24 medium

What is the term for crops specifically bred or engineered to produce their own natural pest resistance, such as Bt cotton
1. A Pest-resistant crops
2. B Drought-resistant crops (a different specific resistance trait)
3. C Herbicide-resistant crops (a different specific resistance trait)
4. D Frost-resistant crops (a different specific resistance trait)
💡 Explanation:
Pest-resistant crops, such as Bt cotton, are specifically bred or engineered to produce their own natural pest resistance.
Q25 medium

What is the term for the accumulation of salt in soil, often resulting from improper irrigation, which can harm plant growth
1. A Soil erosion (relates to topsoil loss, a different concept)
2. B Soil fertility (relates to soil's capacity to support growth, a different concept)
3. C Soil compaction (relates to soil density increase, a different concept)
4. D Soil salinity
💡 Explanation:
Soil salinity refers to the accumulation of salt in soil, often from improper irrigation, which can harm plant growth.
Q26 medium

What is the term for the loss of topsoil due to wind, water, or human activity, a significant agricultural concern
1. A Soil erosion
2. B Soil fertility (relates to soil's capacity to support plant growth, a different concept)
3. C Soil compaction (relates to soil density increase from pressure, a different concept)
4. D Soil salinity (relates to salt accumulation in soil, a different concept)
💡 Explanation:
Soil erosion refers to the loss of topsoil due to wind, water, or human activity, a significant agricultural concern.
Q27 medium

What is the term for large-scale, confined livestock operations focused on maximizing production efficiency, sometimes criticized for animal welfare concerns
1. A Factory farming (Intensive livestock farming)
2. B Free-range farming (the opposite, less confined approach)
3. C Organic farming (a related, but distinct concept, focused on avoiding synthetic inputs generally)
4. D Subsistence farming (a different, smaller-scale approach, primarily for family needs)
💡 Explanation:
Factory farming (intensive livestock farming) refers to large-scale, confined operations focused on maximizing production efficiency.
Q28 medium

What is the term for the practice of allowing livestock to graze on pasture land, as opposed to confined feeding operations
1. A Free-range/pasture grazing
2. B Factory farming (a different, typically confined, intensive livestock-raising approach)
3. C Feedlot farming (a related, specific type of confined operation, particularly common for cattle finishing)
4. D Intensive farming (a broader term, often associated with confined, high-input approaches, opposite of pasture grazing)
💡 Explanation:
Free-range (pasture) grazing allows livestock to graze on pasture land, as opposed to confined feeding operations.
Q29 medium

What is the general term for the study of raising livestock for food, fiber, and other agricultural products
1. A Animal husbandry
2. B Horticulture (a different field, focused on plants specifically)
3. C Aquaculture (a different field, focused on aquatic organisms)
4. D Agronomy (a different field, focused on crop production/soil management)
💡 Explanation:
Animal husbandry is the general term for the study and practice of raising livestock for food, fiber, and other products.
Q30 medium

What is the term for the practice of storing harvested seeds for future planting, an ancient agricultural practice increasingly regulated by modern seed patents
1. A Seed saving
2. B Crop rotation (a different, related soil-management practice)
3. C Selective breeding (a related, but distinct practice, focused on trait improvement rather than simply storage)
4. D Fallowing (a different practice, leaving land unplanted)
💡 Explanation:
Seed saving is the practice of storing harvested seeds for future planting, an ancient practice increasingly affected by modern seed patents.
Q31 medium

What is the term for traditional, open-pollinated plant varieties passed down through generations, valued for genetic diversity
1. A Hybrid varieties (created through controlled crossbreeding, a different concept)
2. B Heirloom varieties
3. C Genetically Modified varieties (created through direct genetic engineering, a different concept)
4. D Commercial varieties (a broader, less specific term, not necessarily defined by this traditional/heritage aspect)
💡 Explanation:
Heirloom varieties are traditional, open-pollinated plant varieties passed down through generations, valued for genetic diversity.
Q32 medium

What is the term for the specific breeding technique of crossing two different plant varieties or species to combine desirable traits
1. A Selective breeding (a broader term, encompassing various breeding approaches)
2. B Genetic engineering (a different, more direct DNA-modification technique)
3. C Cloning (a different technique, creating genetically identical copies)
4. D Hybridization
💡 Explanation:
Hybridization is the specific breeding technique of crossing two different varieties or species to combine desirable traits.
Q33 medium

What is the term for the science and technology of selectively breeding plants and animals to enhance desirable traits
1. A Selective breeding
2. B Genetic engineering (a related, but distinct, more direct DNA-modification technique)
3. C Cloning (a related, but distinct technique, creating genetically identical copies)
4. D Hybridization (a related, but narrower, specific breeding technique - crossing different varieties/species)
💡 Explanation:
Selective breeding is the broader science and practice of choosing organisms with desirable traits for breeding to enhance those traits.
Q34 medium

What is the term for farming conducted primarily for profit and market sale, often at a larger commercial scale
1. A Sustainable agriculture (a different concept, focused on long-term viability broadly)
2. B Subsistence agriculture (the opposite approach - farming primarily for family needs)
3. C Commercial agriculture
4. D Organic agriculture (a related, but distinct concept, focused specifically on avoiding synthetic inputs, not defined by scale/purpose)
💡 Explanation:
Commercial agriculture involves farming conducted primarily for profit and market sale, often at a larger scale.
Q35 medium

What is the term for farming primarily to meet the basic needs of the farming family, with little surplus for sale
1. A Sustainable agriculture (a different concept, focused on long-term viability broadly)
2. B Industrial agriculture (a different, typically large-scale, market-focused approach)
3. C Subsistence agriculture
4. D Commercial agriculture (the opposite approach - farming primarily for market sale/profit)
💡 Explanation:
Subsistence agriculture involves farming primarily to meet the basic needs of the farming family, with little surplus for sale.
Q36 medium

What is the term for farming practices specifically aimed at long-term environmental, economic, and social viability
1. A Sustainable agriculture
2. B Industrial agriculture (a related, but distinct term, often associated with large-scale, input-intensive practices)
3. C Subsistence agriculture (a different, smaller-scale farming approach primarily for the farmer's own family needs)
4. D Commercial agriculture (a related, but distinct term, focused on farming for profit/market sale, not specifically defined by long-term sustainability)
💡 Explanation:
Sustainable agriculture refers to farming practices specifically aimed at long-term environmental, economic, and social viability.

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Agriculture Science MCQs 2026

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