Advertisements
Advertisements
Question
Which of the following is not true for fertilisers?
Options
They increase the yield
Their excessive use disturbs the balance of nutrients in soil
They are generally used in small quantity
They are environment friendly
Solution
They are environment friendly
Explanation -
Fertilisers are not environment friendly as they are chemical substances rich in particular nutrient, Though, they increase the crop yield, the repeated and excessive use of fertilisers in the same field reduces the soil fertility, It also pollutes water bodies as they get dissolved and washed away by rain and also seeps in the water table posing threats to humans.
APPEARS IN
RELATED QUESTIONS
Damaged seeds would _________ on top of water.
______ is called as farmer’s best friend.
______ fertilizer is ecofriendly.
Give an example for inorganic fertilizer.
______ help plant grow and restore soil fertility.
Fertilizers containing only plant or animal-based materials or those synthesized by microorganisms are called inorganic fertilizers.
Analogy:
Organic fertilizer: Compost:: Inorganic fertilizer: ______.
Tabulate the nutrients present in inorganic fertilizers.
Pick out the odd one from the following words given in the box and give reason for it.
| Plough | Seed drill | Hoe | Chain pump | Sickle |
If you are given a dry piece of land for cultivation, what will you do before sowing the seeds?
State whether the following statement are True/False. Correct the false statement.
Using good quality seed is the only criterion to get high yield.
State whether the following statement are True/False. Correct the false statement.
Cells of root nodules of leguminous plants fix nitrogen.
- Name the tool used with a tractor for sowing seeds in a field.
- What are the advantages of using this tool?
______ is a method of sowing seeds.
