Since I've fallen in love with H&H farming all over again I figured I would suggest two new tools to the farming profession to make farming more enjoyable (and in some cases bearable for those with a large field.)
[Seed Dibber]
Size: 1x2
Skills required: Carpentry, Farming
Objects required: Block of Wood
Description: Since Roman times the dibber was primarily used for making holes in the ground as opposed to using your hand to plant seeds. A man would walk with a dibber and place the holes while another person filled each hole with a seed and covered it with soil. To implement this into a H&H mechanic, a dibber should be equivalent in use to a scythe but not as fast. Pros to using a dibber would be having a dibber in one hand and a traveler's sack in another and having early access to something to make farming easier even if you don't have access to metal. Cons would be it's not nearly as quick as a scythe and using it over and over degrades its quality until it breaks. Better quality means it lasts longer.
Also, yes I know a seed dibber is used to plant seeds, not harvest them, so it wouldn't make sense that having a seed dibber would make you harvest quicker. But lets face it, H&H isn't based on realism, otherwise we wouldn't be using a scythe to harvest our beets and carrots.
[Seed Drill]
Size: 1x1
Skills required: Carpentry, Farming, Metalworking
Objects required: Any metal x5, Block of Wood x5, Board x20
Description: A seed drill was basically a tool that was used to evenly distribute and cover seeds in a plowed field. To implement this into a H&H mechanic, I imagine this device to be a combination of a seedbag, plow, and wagon. Let me elaborate further about how this would work. You would place the seeds you want sown into the seed drill container. From there you can either push the seed drill by hand at the speed of a crawl, or leash a cow to it and drive it like a wagon at the speed of a wood plow. As you're pushing the seed drill it will plow in a 1x3 and automatically plant whatever seeds you have in your seed drill container. Pros to using a seed drill would be quicker large-scale farming. Cons would be it's still slow compared to other methods of farming i.e. metal plow and planting by hand.