Question
Describe the method for replinishing the soils with minerals and other essential constituents used by plants growing in those soil by farmers.
✓
Answer
Replenishment of Nutrients in Soil:
Crops require a lot of nitrogen to make proteins. After the harvest, the soil becomes deficient in nitrogen. Plants cannot use the nitrogen gas available in atmosphere directly. Action of certain bacteria can convert this nitrogen into form readily used by plants. Rhizobium bacteria live in the root nodules of leguminous plants. These bacteria take nitrogen gas from the atmosphere and convert it into water soluble nitrogen compounds making it available to the leguminous plants for their growth.
In return, leguminous plants provide food and shelter to the bacteria as Rhizobium cannot prepare its food. They, thus have a symbiotic relationship. This association is very important for the farmers, as they do not need to add nitrogen fertilisers to the soil in which leguminous plants are grown.
Crops require a lot of nitrogen to make proteins. After the harvest, the soil becomes deficient in nitrogen. Plants cannot use the nitrogen gas available in atmosphere directly. Action of certain bacteria can convert this nitrogen into form readily used by plants. Rhizobium bacteria live in the root nodules of leguminous plants. These bacteria take nitrogen gas from the atmosphere and convert it into water soluble nitrogen compounds making it available to the leguminous plants for their growth.
In return, leguminous plants provide food and shelter to the bacteria as Rhizobium cannot prepare its food. They, thus have a symbiotic relationship. This association is very important for the farmers, as they do not need to add nitrogen fertilisers to the soil in which leguminous plants are grown.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
List the differences between clayey soil and sandy soil.
Draw a labelled diagram showing inhalation and exhalation process in human beings.
Draw the circuit diagram to represent the circuit shown in Fig. 
How do we breathe?
Explain along with a diagram reproduction through spore formation in fungus.
Write the scientific terms for the following.
- The level of water under the ground.
- The process of seeping of water into the ground.
- The circulation of water on the earth.
- The wise and judicious use of water.
- Seeped water that collects between the layers of hard rocks.
Why is transport of materials necessary in a plant or in an animal? Explain.
Match the items of Column I with the items of Column II.
→|
|
Column I
|
|
Column I
|
|
$(a)$
|
Large crystals
|
$(i)$
|
Turns lime water milky
|
|
$(b)$
|
Depositing a layer of zinc on iron
|
$(ii)$
|
Physical change
|
|
$(c)$
|
Souring of milk
|
$(iii)$
|
Rust
|
|
$(d)$
|
Carbon dioxide
|
$(iv)$
|
Sugar candy $(Mishri)$
|
|
$(e)$
|
Iron oxide
|
$(v)$
|
Chemical change
|
|
$(f)$
|
Dissolving common salt in water
|
$(vi)$
|
Galvanisation
|
Distance between Bholu's and Golu's house is 9 km. Bholu has to attend Golu's birthday party at 7 o' clock. He started his journey from his home at 6 o' clock on his bicycle and covered a distance of 6 km in 40 min. At that point, he met Chintu and he spoke to him for 5 min and reached Golu's birthday party at 7 o' clock. With what speed, did he cover the second part of the journey? Calculate his average speed for the entire Journey.
Explain the factors responsible for depletion of water table.