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Force And Laws Of Motion
Why are manure and fertilizers used in fields?
Manures and fertilizers are used in fields to enrich the soil with the required nutrients, improve fertility of the soil and crop yield and quality. Manure helps in enriching the soil with organic matter and nutrients. This improves the fertility and structure of the soil. On the other hand, fertilizers ensure a healthy growth and development in plants. They are a good source of nitrogen, phosphorus, and potassium. A balanced combination of manures and fertilizers in the soil should be used, to get an optimum yield.
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Under which of the following conditions is a person most likely to fall sick ?
(a) When she is recovering from malaria.
(b) When she has recovered from malaria and is taking care of someone suffering from chicken-pox.
(c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox.
Why ?
Under which of the following conditions are you most likely to fall sick ?
(a) When you are taking examinations ?
(b) When you have travelled by bus and train for two days.
(c) When your friend is suffering from measles.
Why?
Why food is necessary?
What do you mean by health?
‘Public cleanliness is important for individual health’ comment.
Why good economic conditions and gibes are needed for individual health?
How can one be in poor health without actually suffering from a particular disease? Give an example.
Give two examples of how health of a person can depend on his environment.
What we commonly mean by community?
How does personal health relate to community health?
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