Explanation

• Zinc Phosphide is a chemical compound used in agriculture.
• It is primarily used to control pests that damage crops.
• It is applied carefully because it is highly toxic.
• Commonly used in fields, granaries, and storage areas.

Last verified on 25-01-2026

Explanation

• Spermatophytes are plants that produce seeds and usually bear flowers or cones.
• They are the most advanced group of plants.

Additional information:

• Spermatophytes: Angiosperms (flowering plants) and Gymnosperms
• Bryophytes: Non-vascular, no seeds
• Pteridophytes: Vascular but seedless

Last verified on 27-01-2026

Explanation

• Sugarcane is a long-duration and high water-requiring crop.
• On average, it needs about 20 irrigations during its growth period under normal conditions.

Additional information:

• Initial stage: Light and frequent irrigations
• Grand growth stage: Higher water requirement
• Maturity stage: Reduced irrigation

Last verified on 27-01-2027

Explanation

• Splice grafting is used for Apple and Mango trees.
• It allows better growth, early fruiting, and disease resistance.

Additional information:

• Splice grafting is a horticultural technique to join two plants.
• It involves joining a scion and rootstock of similar size.
• Commonly used for woody perennial crops.

Last verified on 25-01-2026

Explanation

• Deciduous plants shed their leaves seasonally, usually in autumn or winter.
• Helps the plant conserve water and survive cold conditions.

Additional information:

• Evergreen plants retain leaves all year round.
• Semi-evergreen plants shed only some leaves, retaining others.

Explanation

Oilseed use: Extracted oil used for cooking and industrial purposes.

Pulse use: Soybean meal used as protein-rich food or animal feed.

Additional information:

• Soybean is also a nitrogen-fixing crop, improving soil fertility.

Last verified on 27-01-2026

Explanation

• Mass contact programs are agricultural extension activities designed to reach large groups of farmers at once.
• These programs aim to spread knowledge, demonstrate techniques, and encourage adoption of new practices.

Additional information:

• Field days: Farmers visit experimental farms to observe new technologies.
• Demonstrations: Practical showing of crop, pest, or soil management methods.
• Agricultural fairs: Large gatherings where products, machinery, and techniques are displayed.

Last verified on 27-01-2026

Explanation

• The movement of water within the soil profile is called percolation.
• It involves water moving downward through soil layers due to gravity.
• Important for recharging groundwater and maintaining soil moisture.

Additional information:

• Percolation rate depends on soil texture, structure, and porosity.
• Sandy soils have high percolation, clay soils have low percolation.

Last verified on 27-01-2026

Explanation

• A tensiometer is used to measure soil moisture.
• It indicates the soil water tension, showing how tightly water is held by the soil.
• Commonly used for irrigation scheduling in agriculture.

Additional information:

• Tensiometers are most effective in sandy and loamy soils.
• Help farmers avoid over- or under-irrigation.

Last verified on 27-01-2026

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