> corn and other crops specifically for biodiesel.

honestly that always sounded very misguided to me

fields are not perfectly renewable, biomas gets removed from them and fertilizers can only help so much in any given time frame

mostly corn/raps mono-culture can make that easily far worse

and not needing to import food can safe a lot of energy too

also as you mentioned, modern solar panels seem overall more efficient

in difference to solar or wind, biodiesel just seem a very bad choice