Explanation

• ETL (Economic Threshold Level) is the pest population level at which control measures should be taken to prevent significant economic loss.
• For whitefly (Bemisia tabaci), ETL is 5 adults per leaf on crops like cotton or vegetables.
• Helps farmers apply pesticides only when necessary.

Last verified on 25-01-2026

Explanation

• Biotechnology in crops is used to introduce desirable traits for improved performance.
• Common traits include pest resistance, herbicide tolerance, and drought tolerance.
• These traits help in increasing yield, reducing losses, and conserving resources.

Last verified on 25-01-2026

Explanation

• Low crop yield occurs when growth conditions are unfavorable.
• Main causes include poor soil fertility, inadequate water, and pest/disease attacks.
• Proper management of soil, water, and pests can improve yield significantly.

Last verified on 25-01-2026

Explanation

• Phosphorus is essential for energy transfer, root development, and flowering.
• Deficiency leads to stunted growth and dark green or purplish leaves.
• Common in acidic, sandy, or phosphorus-deficient soils.

Additional information:

• Foliar spray or phosphate fertilizers (e.g., SSP, DAP) can correct deficiency.
• Adequate phosphorus enhances flowering, fruiting, and seed formation.

Last verified on 25-01-2026

Explanation

• Cotton is an important fiber crop in Pakistan.
• Seed rate depends on seed type and germination percentage.
• Delinted seeds with 75% germination require lower seed rate to ensure proper plant population.

Additional information:

• Delinted seeds are cleaned to remove lint, improving germination.
• For fuzzy seeds (with lint), the seed rate is slightly higher: 8–10 kg/acre.

Last verified on 23-01-2026

Explanation

• CPF‑248 is a high-yielding sugarcane variety developed for better sucrose content and disease resistance.
• Suitable for tropical and subtropical regions of Pakistan.

Additional information:

• CPF‑248 supports mechanized harvesting.
• Improves profitability for sugarcane farmers due to high yield and sugar content.

Last verified on 25-01-2026

Explanation

• Galaxy‑2013 is a high-yielding wheat variety developed for improved disease resistance and quality.

Additional information:

• Galaxy‑2013 is suitable for mechanized farming.
• Its grain is hard and suitable for bread and chapati making.

Last verified on 25-01-2026

Explanation

• Visual aids are tools used to enhance learning and communication in agricultural extension.
• Common examples include blackboards and overhead projectors.

Additional information:

• Visual aids support verbal explanations and clarify complex topics.
• Modern aids include PowerPoint, videos, and interactive digital tools.

Last verified on 25-01-2026

Explanation

• Bulb crops are plants that store food in underground bulbs.
• Food stored in bulbs helps the plant survive adverse conditions.
• Common bulb crops include Garlic and Onion.

Additional information:

• Bulb crops are rich in vitamins, minerals, and sulfur compounds.
• They can be propagated vegetatively using cloves or bulbs.

Last verified on 25-01-2026

Explanation

• A toxin is a poison produced naturally by a plant.
• It protects the plant from herbivores and pathogens.

Additional information:

• Examples of toxic plants: Ricinus (Castor), Nerium (Oleander), Datura, Aconitum, Foxglove

Last verified on 25-01-2026