State how barseem,oats,or sudan grass are used by farmers.

The major groups of activities for improving crop yields can be classified as:

Anil's father was getting late for a function which he had to attend with his family. He started driving very fast and very close to the vehicle in front of theirs. Anil told his father that he should not do so as in case of any emergency,an accident could occur. He explained this to his father in detail. His father got convinced and started driving within the permissible limit and maintained a good gap between his car and the vehicle ahead of him.
$(a)$ What might Anil have explained to his father to convince him?
$(b)$ What are the values shown by Anil?

How does catla differ from mrigal?

Sitaram,an educated farmer,convinces his friends to use manure instead of fertilizers in their fields. List any two advantages that the farmers will get if they accept this advice. How does the excessive use of fertilizers affect the environment? Which values of Sitaram are depicted by his efforts?

During class,Ravi's teacher was teaching about Thomson's model of an atom,stating that an atom is electrically neutral,i.e.,it contains equal positive and negative charges,and that an atom consists of a sphere of positive charge in which electrons are embedded like plums in a pudding. Ravi wondered how his teacher related Thomson's model of an atom to a plum pudding,and he imagined that just as dry fruits are embedded in a Christmas pudding,electrons are embedded in a sphere of positive charge.
$(a)$ According to you,what kind of qualities does Ravi possess?
$(b)$ What are the limitations of Thomson's model?