Explanation

• A diesel engine’s normal operating coolant temperature is commonly around 80–95°C, depending on the engine model.
• 90°C is a typical operating temperature for many diesel engines.
• The cooling system maintains this temperature to support efficient operation and prevent overheating.

Last verified on 16-10-2026

Explanation

• George Harrison Shull (1874–1954) was an American geneticist recognized as a pioneer of modern hybrid corn technology.
• In 1908, Shull published research explaining the role of inbreeding and crossbreeding in producing hybrid vigor (heterosis).
• Hybrid seed technology uses controlled crosses between selected parent plants to produce offspring with desirable traits, such as higher yield.

Additional information:

• Yuan Longping: The Father of Hybrid Rice.
• Norman Borlaug: The Father of the Green Revolution.

Last verified on 16-10-2026

Explanation

• Sugarcane is commonly propagated vegetatively using stem cuttings called setts, which contain buds for sprouting.
• A seed rate of approximately 7–9 tons per hectare may be used.
• It is depending on sett size, planting method, row spacing, and local agricultural recommendations.

Last verified on 16-10-2026

Explanation

• Food processing: The process of converting raw agricultural products into food products or improving their value, quality, convenience, and usability.
• Examples include making juice from oranges and cheese from milk.

Additional information:

• Food science: The study of the physical, chemical, and biological properties of food.
• Food preservation: The process of preventing or slowing food spoilage to extend shelf life.
• Examples include refrigeration, drying, and canning.

Last verified on 16-10-2026

Explanation

• Sour citrus varieties, including sour oranges and related citrus fruits.
• Khyber Pakhtunkhwa is known for citrus production in areas such as Malakand and Swat.
• Citrus cultivation depends on suitable temperatures, soil conditions, and water availability.

Last verified on 16-10-2026

Explanation

• Approximately 80,000 setts per hectare is a possible recommended figure.
• Sugarcane setts are pieces of sugarcane stalk containing buds used for planting and propagation.
• The number of setts required per hectare depends on row spacing, sett length, number of buds, and planting method.

Last verified on 16-10-2026

Explanation

• In 1980, the Pakistan Agricultural Research Council (PARC) divided Pakistan into 10 agro-ecological zones.
• The classification was based on physiography, climate, soil, land use, and water availability.
• These zones help identify suitable crops and agricultural practices for different regions of Pakistan.

Last verified on 16-10-2026

Explanation

• Agriculture remains a key contributor to Pakistan’s economy.
• It directly contributes close to 24% of the country’s Gross Domestic Product (GDP).

Last verified on 03-02-2026

Explanation

• Gene Definition: Basic physical and functional unit of heredity
• Location: Found on chromosomes within DNA
• Function: Codes for proteins or RNA molecules that determine traits
• Types: Structural genes (proteins), regulatory genes (control expression)
• Inheritance: Passed from parents to offspring during reproduction

Last verified on 05-02-2026

Explanation

• Definition: Total value of goods and services produced within a country in a year
• Components: Consumption, Investment, Government Spending, Net Exports
• Purpose: Measures economic performance and standard of living
• Units: Usually in US dollars or local currency
• Major Example: Pakistan’s GDP in 2025 ≈ $500 billion (nominal)