Fertilizer, waterways, and scarecrows by TerminalFont
I did a few searches and didn't find much, so I thought I'd drop this info here. If I missed relevant results in those searches, I apologize. Have a good day!
Fertilizer: Decreases time to grow.
Drying 5 common grains gives Inorganic Fertilizer. Amount that it boosts: http://i.imgur.com/Rj2sjuu.png
Shaking and Mixing 3 Inorganic Fertilizer and 2 Fermenter (bought from Innkeepers) gives Fertilizer Byproduct. Amount that it boosts: http://i.imgur.com/op1RciC.png
Shaking and Mixing 2 Distilled Waters (Heating bottles of river water) and 1 Fertilizer Byproduct gives Organic Fertilizer. Amount that it boosts: http://i.imgur.com/HGETOwE.png
Waterways decrease water consumption. By themselves they simply allow the natural groundwater to last longer. They really shine when you water your plants to full thus increasing the time you can spend away from the farm before having to come back and water your crops. You will have a stunted harvest if your crops run out of water.
And scarecrows reduce the chance of bird attacks.