Compost, top dressing, humus, manure, potash, mulch...
Another word for a low fertile plain is a steppe.
loess
The word for fertile loam is "humus".
The root word of fertilize is "fert." It comes from the Latin word "fertilis" meaning fertile or fruitful.
Tagalog translation of fertile: pagpupunlay
the fertile crescent is a region in the near east
the Fertile Crescent, the Land Between Two Rivers.
Plants can only grow in fertile soil
The farmers' fields were fertile, producing abundant crops year after year.
Fertile
The fertile soil was good for planting seeds.
Infertile or barren.