NCERT Science Notes for Class 7 (Part 7) 1.5

 Hello friends in this article you are going to read about nutrients in the soil.

 

In the previous part you read-

1. Fungi

2. Symbiosis

3. Lichens

Link for the previous part-

 https://allinoneguidematerial.blogspot.com/2020/10/ncert-science-notes-for-class-7-part-6.html

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In this part you are going to read about-

1. Different types of nutrients required by plants

2. What is Rhizobium?

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1. Ever thought why do farmers spray fertilizers in the soil? The fertilizers and manures which farmers put in their crop give the plants some essential nutrients like potassium, phosphorus. Etc.

 

2. These nutrients are added to the soil after a period of time as the plants absorb the nutrients present in the soil, and soil becomes deficient of nitrogen and nutrients.

 

3. But there is a bacterium called Rhizobium, it can make atmospheric nitrogen to a usable form for the plants.

 

4. As we know fruits and vegetables are rich source of vitamins, and vitamins are also nitrogenous food, so they also need nitrogen, and that’s another reason why farmers spray fertilizers.

 

5. The bacterium Rhizobium can’t make its own food but it lives in a symbiosis or symbiotic relation with the plant.

 

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