You can go back and adjust the quantity for any unharvested production. Beneficial interest is one of the benchmarks for eligibility for an LDP or a marketing loan gain. And here's a USDA backgrounder on LDPs and marketing loans . Any of the eligible production evidence will be accepted, such as load summary sheets, warehouse receipts, or a paid measurement service, or you can certify the quantity and bring in production evidence later. If you use CCC-709, you cannot certify and must have production evidence with you in order to receive payment.
Commodities contaminated with aflatoxin are eligible for marketing assistance loans and LDPs.
For LDPs, the LDP is figured off the full base county loan rate. Say I produce 1,000 bushels of corn on the farm and have sold 500 bushels. You cannot claim an LDP and take out a loan on the same bushels. Once you have taken out a loan, you cannot claim an LDP on those bushels. Likewise, if you claim an LDP, you cannot put the same bushels under loan.