Explanation

• Soil pH measures the acidity or alkalinity of soil, affecting nutrient availability.
• Most soils in Pakistan are neutral to slightly alkaline, with a pH of 7–8.

Additional information:

pH ranges of soil types:

• Acidic soil – < 7 (e.g., hilly areas of Pakistan)
• Neutral soil – 7
• Slightly alkaline soil – 7–8 (most Pakistani soils)
• Strongly alkaline soil – 8–9
• Sodic soil – > 9

Last verified on 24-01-2026

Explanation

• A region where total rainfall is less than evapotranspiration is classified as a Desert.

Additional information:

Examples of desert regions:

• Sahara Desert – Africa
• Thar Desert – Pakistan/India
• Arabian Desert – Middle East
• Gobi Desert – China/Mongolia
• Kalahari Desert – Africa

Last verified on 24-01-2026

Explanation

• Soil water-holding capacity refers to the ability of soil to retain water for plants.
• Clay soil has very fine particles.
• It can hold the most water.

Additional information:

Water-holding capacity of soils (approximate):

• Clay – 40–60%
• Silt – 30–50%
• Loam – 25–40%
• Sandy soil – 5–15%
• Peaty soil – 50–80%

Last verified on 24-01-2026

Explanation

• Wheat cultivars are developed to suit different environmental conditions.
• Inqlab is a drought-tolerant wheat variety, suitable for barani (rainfed) areas.

Additional information:

• Inqlab matures in short to medium duration (~110–115 days).
• It is resistant to rust diseases, making it ideal for rainfed farming.

Last verified on 24-01-2026

Explanation

• Climate refers to the average weather conditions of a region over a long period.
• It includes temperature, rainfall, humidity, and wind patterns.

Additional information:

Examples of climate types:

• Tropical – Amazon, Brazil
• Desert – Sahara, Egypt
• Temperate – UK, Germany
• Polar – Antarctica, Greenland
• Mediterranean – Italy, Greece

Last verified on 24-01-2026

Explanation

• Fungal diseases are caused by fungi, which are microorganisms like molds, yeasts, and rusts.
• They affect plants by infecting leaves, stems, and roots, reducing growth and yield.

Additional information:

Common plant fungal diseases:

• Loose Smut – Wheat (Ustilago tritici)
• Rice Blast – Rice (Magnaporthe oryzae)
• Powdery Mildew – Grapes (Erysiphe spp.)
• Stem Rust – Wheat (Puccinia graminis)
• Sheath Blight – Rice (Rhizoctonia solani)

Last verified on 24-01-2026

Explanation

Loose smut is a fungal disease that affects wheat.

Additional information:

Major wheat fungal diseases:

• Loose smut – Ustilago tritici
• Leaf rust – Puccinia triticina
• Stem rust – Puccinia graminis
• Stripe rust – Puccinia striiformis
• Karnal bunt – Tilletia indica

Last verified on 24-01-2026

Explanation

• Hybrid maize is developed to give higher yield and better disease resistance.
• FH-810 is a well-known hybrid maize variety in Pakistan.

Additional information:

Examples of hybrid maize varieties in Pakistan:

• FH-810 – high-yield, drought-resistant
• FH-985 – short-duration hybrid
• DK-8031 – disease-resistant hybrid
• NK-6240 – quality grain hybrid
• Pioneer-30B80 – widely cultivated hybrid

Last verified on 24-01-2026

Explanation

• Bacterial Leaf Blight (BLB) is a serious disease affecting rice crops.
• It is caused by the bacterium Xanthomonas oryzae pv. oryzae.

Additional information:

• Rice Blast – Magnaporthe oryzae
• Sheath Blight – Rhizoctonia solani
• Brown Spot – Cochliobolus miyabeanus
• Tungro Virus – viral disease

Last verified on 24-01-2026

Explanation

• Kinnow is a high-yield citrus fruit variety widely grown in Pakistan.
• It is a hybrid of Mandarin and Orange developed for better juice content and taste.
• Kinnow is mostly cultivated in Punjab, especially Sargodha and Multan regions.

Last verified on 24-01-2026