Economic survey... We can tackle most of the question with basics understanding of optional theory part.. I will try to write the answer of above question in night..

What were the major difficulties in achieving green and white revolution in bihar??

Nice attempt.. Below is my observations- 1. Proper introduction is lacking. 2. Few factual errors. Core density varies from 11-17. It is 17 for inner core 3. Add role of indirect and direct sources to study interior of earth.

Role of direct and indirect sources means

Direct role - mining and volcanoism- Indirect- seismic waves..

Low investment capacity Failure of land reform Poor credit facilities Lack of communication infrastructure Small land holdings Lack of political will Farmers attitudes toward new technologies Poor infrastructure - marketing..