Are you thinking more like consultants or agronomists? Something more like transportation and processing? Perhaps marketing support or cooperative marketing boards?

I think methodologies will differ a lot depending on which type of service you're more focused on.

Also, are you more interested in the perspective of the farmers, what services they are aware of and/or make use of, or are you more interested in the perspective of the service providers? If you focus on farmers, perhaps you wouldn't identify challenges that their service providers face in providing those services, but if you focus on the service providers, then perhaps you wouldn't identify services that farmers think they can make good use of but aren't presently offered in their area (for example, support in weighing options across seed varieties for their particular soil and climate conditions).

Dear sir 

I am looking for farmers perspective and service provider as well . therefore, suggest the methodology  in view of these clients. I wish to assess why farmers are willing to adopt/pay /accept particular technique of particular service provider. How they are willing to pay if quality of services improved. How to do it.

thanks

Dear Subhash:

Your questions are far too broad to answer. You need to do some reading on conjoint analysis to prepare yourself to ask good questions. Read Understanding Conjoint Analysis in 15 Minutes by sawtooth software then you will know the questions to ask.

Good Luck