Biology
Grade-7
Easy
Question
Which of the following can be applied to crops to boost their growth?
- Pesticides
- Nitrogen fertilizers
- Carbon dioxide fertilizers
- Oxygen fertilizers
Hint:
Element that present in fertilizers.
The correct answer is: Nitrogen fertilizers
- Nitrogen is essential for plant growth
- Nitrogen though is present in atmosphere, it cannot be used as such by plants
- Only nitrogen derivatives can be utilized by plants for their growth
- Commonly used fertilizer contains nitrogen, phosphorous and potassium (NPK) in the ratio of 4:2:1
- Nitrogen is important for the chlorophyll pigment and strength of leaves and roots
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