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CBSE Class 9 Answered

<div>What is feed ? What are the different types of weed ? How does it differ with respect to age and functions ?</div>
Asked by jeffladebo | 12 May, 2015, 05:03: PM
Expert Answer

Weeds are the plants which have their undesirable effects on the environment and economy. They compete with other plants for the resources and prohibit their growth.

Types of weeds:

Based on the life span there are three types of weeds.

  • Annual type – These weeds complete their life cycle in the span of one year.
  • Biennial type – These weeds have the life cycle that lasts of two years.
  • Perennial type – These weeds have the life span which for more than two years.
Answered by Hemangi Binny | 13 May, 2015, 09:38: AM
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