http://www.econlib.org/library/Enc/AgriculturalSubsidyPrograms.html
For 2018, see:
https://fas.org/sgp/crs/misc/RS22131.pdf
I’m familiar with the Farm Bill. Note that food stamps are 80% of the total.
Of the remaining 20% that actually is for agriculture, more than half is subsidized crop insurance and for public-use land conservation.
I only see a mention of sugar as a crop subsidy.
Note that page 8 pf the pdf notes that direct payments for traditional commodity crops have been eliminated.