Q12 of 17 Page 139

I am a plant. I grow in crop fields. Farmers pluck me. I do not know the reason. Can you tell who am I?

We are weeds. Weeds are the unwanted plants that grow along with our food crops and compete for nutrients, space, sunlight, air, water etc. They reduce our crop yield. Some are poisonous, some causes diseases and some interfere in harvesting process. So farmers pluck and remove them.


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10

Rajendra cultivated cotton crop in his field. He did not get sufficient yield. Can you guess the reasons?

 11

What do you observe in the experiment of dropping a fist of Bengal gram seeds in water?

- What are the differences you observed in both the seeds?


- Do you know why the floated seeds are lighter in weight?


- Which seeds germinate well? Why?


- Which seeds would not germinate properly? why?

 13

GO to your nearest fertilizer shop and collect the information about chemical fertilizers and fill the table. Copy the following table in your note book.

 14

PREPARE a flow chart from ploughing to yielding in paddy