Overall, the gameplay and card descriptions are clear. Some points to consider:
-- It's nice to see a round summary at the start of the gameplay rules. You might want to refer to "Each" round having 4 steps instead of "One" round, avoiding any question of whether other rounds have a different step count.
-- You can make the card descriptions more efficient and easier to parse by dropping "allow you to". Try simpler declarative sentences like "Combines double the value of one Crop card you sell."
-- Similarly, phrases like "put all Farm cards played that round in the discard" could be more efficiently stated as "Discard all Farm cards played that round." ("Discard" is a common enough term that you can reasonably assume anyone playing this game will know it.)
-- You're doing a lot of underlining here, especially in the later parts of the rules. Underlining is useful to add emphasis, but there's enough here that it's hard to see which points are most important. Try cutting it in half and seeing if testers have any trouble understanding the rules.
-- Is money open or hidden? I'm assuming open, given the backs of the cards and the lack of a screen, but some players will be more comfortable if you confirm this in the rules.
-- Sometimes the examples are hard to distinguish from the main rules text. (For example, the Farmer Cameron paragraph in sales section). Consider adding something to highlight the examples, whether it's a box treatment, italic text, or even just "For example," at the start of the paragraph. :)
-- You probably don't need to describe / provide an example for how to make change. You don't really need the space, but consider dropping that so the player has less information to sort through.