One of the main reasons for it’s success is it’s climate with it’s gentle rainfall and long growing seasons. Plus much of the farmland being not too hilly.
Shrub hedges and/or stone walls such as Cornish hedges were also built around fields which in a literal sense – prevented erosion because the topsoil had nowhere to go. The hedges also provided ecosystem and a home for beneficials to do their job.
But perhaps further than a favorable region or a set of techniques that made Western European farms work so well is the social context of how the land was taken care of.