Agriculture
Weeds and their harmful effects
In this Class 9 Agriculture topic from “Weed and Pest Management,” students learn what weeds are and why they are harmful to crops. They explore how unwanted plants compete with crops for water, nutrients, sunlight, and space, reduce yield and quality, and interfere with farm operations. The topic also covers how some weeds shelter pests, spread diseases, or harm people and animals. Understanding these effects helps students connect weed identification with timely, safe, and appropriate management practices.
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Practice questions are not available for this topic yet. We plan to add questions with clear explanations soon. You can keep practising other topics in the meantime.
- Class / subject
- 9 · Agriculture
- Chapter
- Weed and Pest Management
- Topic
- Weeds and their harmful effects
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