After you read Kirkendall (regarding which I strongly second Gerry's
recommendation), you can follow up on your new-found (or rekindled)
interest in innovative New Deal ag. programs with:
Poverty and Politics: The Rise and Decline of the Farm
Security Administration, by Sidney Baldwin (Univ. of North
Carolina Press, 1968).
A first-rate job on a topic that should be of interest to all of us.