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

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All MCQs and revision practice

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621. The person who influences the adoption of a new innovation informally in a social system is called ______?

وہ شخص جو کسی سماجی نظام میں کسی نئی ایجاد کو غیر رسمی طور پر اپنانے پر اثر ڈالتا ہے، اسے کیا کہتے ہیں؟

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Answer: Opinion leader

Explanation An opinion leader is a person who influences others to adopt new ideas or innovations. They are trusted and respected members of a social group. Their recommendations often speed up the acceptance of innovations. Last verified on 03-02-2026

622. Storage at ultra-low temperature is called _____?

انتہائی کم درجہ حرارت پر ذخیرہ کرنے کو کیا کہتے ہیں؟

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Answer: Cryogenic storage

Explanation Cryogenic storage involves storing biological materials or food at ultra-low temperatures (usually below −150°C). Prevents microbial growth and slows down biochemical reactions. Used for seeds, tissues, and germplasm preservation. Last verified on 03-02-2026

623. The macronutrient which regulate opening and closing of stomata and reduce water loss from the leaves?

میکرونٹرینٹ جو اسٹوماٹا کے افتتاحی اور بند ہونے کو منظم کرتا ہے اور پتیوں سے پانی کے نقصان کو کم کرتا ہے؟

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Answer: Potassium

Explanation Stomata are tiny pores on leaf surfaces that control gas exchange and water loss . Their opening and closing is regulated by certain nutrients. Additional information : Adequate potassium improves drought tolerance and water-use efficiency in crops. Crops like wheat, rice, and sugarcane respond strongly to potassium fertilization. Last verified on 01-02-2026

624. Gypsum is a rich source of ______?

جپسم ______ کا ایک بھرپور ذریعہ ہے؟

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Answer: Calcium+Sulphur

Explanation Gypsum is a soil amendment and fertilizer source. It supplies calcium and sulphur to the soil. Commonly used for reclamation of saline and sodic soils. Additional information : Chemical formula of gypsum: CaSO₄·2H₂O. Helps in improving infiltration and root growth . Last verified on 27-01-2026

625. Water-soluble fertilizer applied through irrigation is called _____?

ایسے پانی میں حل ہونے والے کھاد کو جو آبپاشی کے ذریعے لگائی جاتی ہے کیا کہتے ہیں؟

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Answer: Fertigation

Explanation Fertilizers provide essential nutrients for healthy plant growth . Some fertilizers can be dissolved in water and applied directly through irrigation systems . This method ensures even nutrient distribution and efficient absorption . Last verified on 23-01-2026

626. The age of the earth is __________?

زمین کی عمر کتنی ہے؟

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Answer: 4.5 billion

Explanation The Earth was formed about 4.5 billion years ago. Additional information : Method Used: Radiometric dating Oldest Materials: Meteorites and ancient Earth rocks Scientific Consensus: Supported by geology and astronomy Last verified on 16-01-2026

627. Which plant hormone stimulates the ripening of fruit and inhabits plant growth?

کون سا پلانٹ ہارمون پھلوں کے پکنے کو تیز کرتا ہے اور پودوں کی نشوونما کرتا ہے؟

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Answer: Ethylene

Explanation Ethylene is a gaseous plant hormone that stimulates fruit ripening. It can inhibit vegetative growth in some plants. It is naturally produced by fruits like apples and bananas during maturation. Additional information : Abscisic acid helps in seed dormancy and stress response. Auxin mainly promotes cell elongation and growth. Last verified on 30-01-2026

628. The most dominant saturated fatty acid in oil of oilseed crops is ______?

تیل والی فصلوں کے تیل میں سب سے زیادہ غالب سیر شدہ فیٹی ایسڈ کون سا ہے؟

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Answer: Palmitic acid

Explanation Palmitic acid (C16:0) is the most common saturated fatty acid in oils of crops like soybean, sunflower, and cottonseed. Saturated fatty acids contribute to stability and shelf life of oils. Last verified on 01-02-2026

629. Rapid necrosis in gram (chickpea) is due to ______?

چنے (گرم) میں تیز موت کس کی وجہ سے ہوتی ہے؟

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Answer: Wilt

Explanation Rapid necrosis in chickpea is caused by wilt , a fungal disease. The fungus infects the vascular system , blocking water and nutrient flow. Leads to sudden yellowing, wilting, and death of plants. Last verified on 03-02-2026

630. For potato seed development, which type of resistant variety is difficult to develop?

آلو کے بیج کی افزائش کے لیے کون سی مزاحم قسم تیار کرنا مشکل ہے؟

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Answer: Virus resistant

Explanation Developing virus-resistant potato varieties is difficult. Because viruses multiply quickly and are transmitted by insects. Virus infections can reduce potato yield by up to 80% . Use of certified seed and crop rotation helps manage virus spread. Last verified on 30-01-2026

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