Why and how did the farmers lose their land?

what roles did the following peopole and things play in this tragedy: The Dusters [big land and cattle companies] banks, mechanization of farming?)

I understood a lot of farmers had debts to banks on machinery they bought but when the drought / dust bowl happened, they could not produce enough crops to repay the loans and the banks took them over but here is Wiki's bit on it

http://en.wikipedia.org/wiki/Agricultural_history_of_the_United_States#Federal_Era:_1914-1960

mostly because the government took it..

nena ayala You are on TV now...

★ http://www.osoq.com/funstuff/extra/extra04.asp?strName=nena_ayala