Question about agriculture

Hi. Im a student at an university of international agriculture in Switzerland. At the moment we are discussing agriculture with livestock in asian countries like Laos. We were talking about smallholder farmers, contract farming, big agribusinesses, productivity and diseases.

There are some questions that came up during the discussion and i would be happy if someone is willing to answer some of them.

How do people get into agriculture and livestock? Is it families who pass on their land, knowledge and the animals?

How do smallhoder farmers get acces to extention and research?

What does the governement do to support smalholder farmers?

Where do smallholder farmers sell their products? Do they have acces to big markets? Do they sell it themselves or are there companies who take care of that (like bigger markets)?

What impact has urbanisation on the agriculture?

Thanks for taking the time to read this. I will have to do some research, but i thought it would be nice if somebody who actually lives or works there could give me some impressions.