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Biology
1. Crop Production and Management
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Q56 of 103 Page 20

What is weeding? Why is weeding necessary ?

The removal of weeds is called weeding. Weeding is necessary since weeds compete with the crop plants for water, nutrients, space and light. Thus, they affect the growth of the crop. Some weeds interfere even in harvesting and may be poisonous for animals and human beings.


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54

What is a fertilizer ? Name any two fertilizers. State two harmful effects caused by the excessive use of fertilizers.

55

Explain how, soil gets affected by the repeated growing of croping the same fields. How does use of fertilizers help the farmers ?

57

What are weedicides? Name one weedicide.

58

What precaution should be taken while spraying weedicides ? Why

Questions · 103
1. Crop Production and Management
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