50% Production Reduction

Below is a photo of a layout that produces all plots at 50% production time.

To achieve this, make sure your river is back to back.
You can expand them out and they will look the same. When placing your row of water make sure it's all red when you're done. Any green high lights means you need to place a piece of water in it's place.
You can copy the picture here, or simply play with your plots to get 50%.
When moving the plots it will highlight "place plots here to get X%"

Happy Farming!!