Question

Asha went to visit her grandfather in his village. He was having a serious
discussion with his fellow members regarding the productivity level of crops
for present year. They all were worried about how to increase the
productivity of crop Asha listened to this and then suggested to the group
that the reason may be decreased level of minerals in soil.
She told her grandfather to plant crops like pulses, gram, beans, etc., for a
year then follow with regular crops. This will increase the crop productivity?
(a) What will you name the process suggested by Asha? Why is there
decrease in crop productivity?
(b) What are noted benefits of this process? Will the results be as what
Asha expressed?
(c) What values are shown by Asha?

Answer 1

Answer

1. Symbiosis

2. There is decreased level of minerals in the soil as the plants growing in the soil use them up and they need to be replenished.

3. It helps in replenishing nitrogen in the soil.

Explanation:

The plants that were suggested are examples of leguminous plants. A nitrogen-fixing bacteria called rhizobium lives in the root nodules of leguminous plants. This bacteria converts atmospheric nitrogen into soil nitrates ( a form which plants can use). Thus, the nutrients get replenished in the soil by growing leguminous plants.