Hahahahah you don't even know how to critique a source properly!Dept of Agriculture gets funding (in large part to subsidize agriculture corporations) for this. It's in their interests to BS the public.
The DoA gets its money from the Federal Govt. and the budget is set by Congress which is indeed subject to lobbying but only to direct money to enrich monied interests, they don't mess with the stats generally and when they do they do it by defunding the "offending" govt. organization.
You have to actually go into the stats and find errors or link to source that has done a good job of doing this otherwise you're just trying desperately to make stuff up.