NCERT Solutions for Chapter: Mineral Nutrition, Exercise 4: LONG ANSWER TYPE QUESTIONS

We find that Rhizobium forms nodules on the roots of leguminous plants. Also, Frankia another microbe forms nitrogen-fixing nodules on the roots of non-leguminous plant Alnus.

What kind of relationship is observed between mycorrhiza and pine trees, whether it is symbiotic or parasitic?

We find that Rhizobium forms nodules on the roots of leguminous plants. Also, Frankia another microbe forms nitrogen-fixing nodules on the roots of non-leguminous plant Alnus.

Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.

What are essential elements for plants? Give the criteria of essentiality? How are minerals classified depending upon the amount in which they are needed by the plants?

With the help of examples, describe the classification of essential elements based on the function they perform.

We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ If no, why?

Trace the events starting from the coming in contact of Rhizobium to a leguminous root till nodule formation. Add a note on importance of leg haemoglobin.

Give the biochemical events occurring in the root nodule of a pulse plant. What is the end product? What is its fate?

Hydroponics have been shown to be a successful technique for growing of plants. Yet most of the crops are still grown on land. Why?