All MCQs - Agriculture Officer Past Papers and Syllabus Practice | PakExamPoint

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All MCQs and revision practice

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661. The valency of carbon is ______?

کاربن کی والینسی کتنی ہے؟

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Answer: 4

Explanation Carbon has a valency of 4 , meaning it can form 4 covalent bonds with other atoms. This property allows carbon to form complex organic compounds . It is the backbone of all organic molecules. Additional information : Examples of Carbon Compounds (5): Methane (CH₄) Ethane (C₂H₆) Glucose (C₆H₁₂O₆) Ethanol (C₂H₅OH) Carbon dioxide (CO₂) Last verified on 19-01-2026

662. Shallow-rooted crops are usually grown in which season?

سطحی جڑ والی فصلیں عموماً کس موسم میں اُگائی جاتی ہیں؟

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Answer: Winter

Explanation Shallow-rooted crops (e.g., lettuce, radish, spinach) are sensitive to water stress and rely on surface moisture. Winter season provides cooler temperatures and adequate moisture in topsoil. They require frequent irrigation due to limited root depth. Last verified on 31-01-2026

663. Puccinia recondita causes which disease?

پوکینیا ریکونڈیٹا کس بیماری کا سبب بنتا ہے؟

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Answer: Rust

Explanation Puccinia recondita is a fungus that causes leaf rust in wheat, leading to yellow-orange pustules on leaves. It reduces photosynthesis and crop yield if not controlled. Additional information : Leaf Blight – Alternaria triticina Smut – Ustilago tritici Powdery Mildew – Blumeria graminis Karnal Bunt – Tilletia indica Last verified on 30-01-2026

664. The machine used to sow seed along with fertilizer is called _____?

وہ مشین جو بیج کے ساتھ کھاد بھی بوتی ہے، اسے کیا کہتے ہیں؟

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Answer: Fertilizer cum seed drill

Explanation Fertilizer cum seed drill is a machine that simultaneously sows seeds and applies fertilizer in rows. It ensures uniform planting and proper nutrient placement, improving crop yield. Additional information : Using this machine reduces labor, saves time , and improves seed-to-soil contact for better germination. Last verified on 27-01-2026

665. In plant cells, which organelle performs photosynthesis and contains chlorophyll?

پودوں کے خلیوں میں، کون سا آرگنیل فوٹو سنتھیس کرتا ہے اور اس میں کلوروفل ہوتا ہے؟

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Answer: Chloroplast

Explanation Chloroplast is the plant cell organelle that performs photosynthesis . It contains chlorophyll , the green pigment that captures sunlight to produce food (glucose) for the plant. Additional information : Mitochondria : Powerhouse of the cell, produces energy via respiration Nucleus : Controls cell activities and stores DNA Last verified on 11-02-2026

666. What is the recommended seed rate of wheat?

گندم کی تجویز شدہ بیج کی مقدار کتنی ہے؟

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Answer: 50-60 kg

Explanation Recommended seed rate of wheat is 50–60 kg per acre. Proper seed rate ensures optimal plant population and yield. Helps in uniform germination and strong crop stand . Last verified on 30-01-2026

667. Planting of a crop before harvesting of the first crop is called?

پہلی فصل کی کٹائی سے پہلے دوسری فصل کی بوائی کو کیا کہتے ہیں؟

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Answer: Relay cropping

Explanation Planting of a crop before harvesting the first crop is called relay cropping . In this system, the second crop is sown while the first crop is still standing. It helps in efficient use of time, land, and residual soil moisture . Last verified on 25-01-2026

668. Sex nucleus that fuses with another in sexual reproduction is _____?

وہ جنسی نیوکلئیس جو جنسی تولید میں دوسرے کے ساتھ ضم ہو جاتی ہے کیا کہلاتی ہے؟

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Answer: Gamete

Explanation A gamete is a sex cell with a nucleus that fuses with another gamete during sexual reproduction. Male gamete = sperm, Female gamete = egg (ovum). Fusion of gametes is called fertilization . Gametes are haploid (contain half the chromosomes). Essential for offspring formation . Last verified on 06-02-2026

669. Potash is usually applied at _____?

پوٹاش عام طور پر کب لگائی جاتی ہے؟

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Answer: Sowing time

Explanation Potash (Potassium fertilizer) is usually applied at sowing or planting time . Potash improves stress tolerance (drought, heat) in plants. Often applied with phosphorus fertilizers ( DAP or SSP ) for better efficiency. Last verified on 25-01-2026

670. Plants having soft, non woody growth are called ______?

ایسے پودے جن کی نشوونما نرم اور بغیر لکڑی کے ہوتی ہے، انہیں ______ کہا جاتا ہے؟

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Answer: Herbaceous

Explanation Plants that have soft, green, non-woody stems and do not develop hard wood are called herbaceous plants. These plants usually live for one or a few years and include many vegetables, flowers, and grasses . Examples : Wheat, Sunflower, Spinach, Rose (herbaceous part), Marigold Last verified on 11-02-2026

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