Explanation

• Plants are classified by their life cycle and parts that survive year to year.
• Some plants have above-ground parts that die each year, but their roots survive to grow again.
• These are called perennial herbaceous plants.

Last verified on 23-01-2026

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

Explanation

• Powdery mildew is a fungal disease affecting the leaves and stems of plants.
• It appears as white powdery spots and reduces photosynthesis and crop yield.

Additional information:

• Other plants affected by powdery mildew include beans, grapes, and cucurbits.
• Control methods: fungicide spray, resistant varieties, proper spacing.

Last verified on 23-01-2026

Explanation

• Before sowing, seeds are prepared to ensure healthy crop growth.
• This includes removing infested seeds, damaged seeds, and weeds.
• Proper seed preparation improves germination rate and crop yield.

Last verified on 23-01-2026

Explanation

• Flax fibers are obtained from the stem of the flax plant.
• The process of separating flax fiber from the woody stem is called scutching.

Additional information:

• Scutching is done after retting to remove woody matter.
• Flax fiber is used for making linen, ropes, and textiles.

Last verified on 23-01-2026

Explanation

• Herbicides are chemicals used to control unwanted plants (weeds).
• Some herbicides inhibit photosynthesis, preventing plants from producing energy.
• Paraquat is a widely used photosynthesis-inhibiting herbicide.

Last verified on 23-01-2026

Explanation

• Potato blight is a devastating plant disease caused by Phytophthora infestans.
• It led to the Great Irish Famine (1845–1852), causing mass starvation in Ireland.
• The disease affects potato leaves and tubers, causing rotting.

Last verified on 23-01-2026

Explanation

• Organic farming requires that soil be free from synthetic chemicals.
• Certification of soil as organic ensures it meets these standards.
• Typically, organic matter certification requires 3 years of organic management.

Last verified on 23-01-2026

Explanation

• Royal jelly is a special secretion used to feed queen bees in a colony.
• It is produced by worker bees from glands in their heads.
• It is rich in proteins, vitamins, and minerals.
• It supporting the growth and reproduction of the queen.

Last verified on 23-01-2026

Explanation

• Soybean is a leguminous crop that still requires nutrients from the soil for optimal growth.
• The nutrient requirement for producing 1 ton of soybean is approximately NPK 100 kg.
• N = Nitrogen, P = Phosphorus, K = Potassium.

Last verified on 23-01-2026