Barbour signed the bill last week which provides up to $17 million in loan guarantees and takes effect immediately.
The Mississippi Development Authority can extend the guarantees to famers who suffered disastrous crop yields in 2009.
Applicants must seek state aid by 1 August.
@tnasolutions launches new #Arabic website http://t.co/PGubzaSc41
#Agriculture Ministers to strengthen #EU policies for young farmers @_CEJA_ hails the conclusions http://t.co/jO1iEBG8ex