Weblarge flat area with good soil (loam).
Webcrop rotation, some plants restore the soil.
Giant's grass (one of the hay producing plants) is the only one that i can think off the top of my head.
Webi found a pretty good map seed :
Webhow to recover lost map seed.
There’s a whole list of previous data.
If you look through these text.
Have you come across a map seed that made you go oh wow that's pretty sweet! ?share it with the community!
Webhuge flat area of loam, surplus of stone and wood, immediate bark, cloth, fruits, grain and melon, bonus trench of heptagonia big enough to feed eight.