What should I do?
Try it before you commit to it.
Pick a crop and how much land. You get the full span the crop table allows — a bad year, a good year, and the middle — carried through the sums. Anything the table cannot support is listed as refused instead of filled in with a guess.
240 crops in the reference carry enough parsed detail to project. The rest are still in the table — they are quoted in stems, blooms, cubic metres or per-cut intervals, and multiplying those by an area produces a confident wrong number.