Explanation

(a)

• G:Goat weed Ageraturn conizoides.
• H:Sida weed Sida acuta
• T: Spear grass Imperiata cylindrica
• J:Elephant grass: Penisetum pur purcum
• K:Pigweed Boerhavia diffusa.

(b)

• It has an underground stem rhizome that produces new shoots from its axillary.
• It has the ability to produce both roots and new shoots from each nodes.
• It is propagated by stolon.
• It is aggoesive

(c)  

• It selves as feed for Polygastric animals
• It can be made into hay and silage for farm animals
• The shoot can be used to make fence
• The Shoot can be used to make mats, doors, and as fire Woods.
• It can help to check soil erosion.

(d) 

• Some are used in feeding farm animals
• Some are used as medicine
• They cover the surface of the soil.
• They increase the cost of production in (Controlling them)
• They compete with crops for nutrients, water, sunlight etc.

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