[This thread will be continually updated. An ad-hoc group of Cooperative Extension educators from several universities recently convened to share, discuss, and offer analysis on the legal issues presented by Covid-19 to farms and other agribusiness. A number of entities across the country are producing material on CARES, PPP and other programs, and they are being listed here for educational purposes.]
UPDATE: The PPP program has apparently "run out of money." Secretary Perdue has announced a new program for farmers totaling $19 Billion ($16 billion in direct payments and $3 billion in government purchase of commodities). A separate piece on the structure of that program will be posted soon.
The Farmers Legal Action Group has released the publication Farmers Guide to Covid-19 Relief (April 2020). This guide appears to be quite comprehensive.
The National Agricultural Law Center is developing a Covid-19 Resource Library. This site contains an aggregated FAQ on the program with multiple contributors.
FAQ on Funding Programs Available to Small and Mid-Size Farms in Response to COVID-19 published by the Food and Beverage Law Clinic at the Elisabeth Haub School of Law at Pace University.
Chart of COVID-19 Federal Legislation and Federal Agency Relief Helpful to Farmers, prepared by the law firm of Shearman & Sterling LLP (New York) and published by Pace Law School.