What is "improved" grassland?

Thunderstorms every other day are making it very difficult for farmers trying to get in hay.

But it makes for lots of beautiful meadows.

I have no idea or interest in the official definituon of improved grassland, but walking the dogs down a local slovenian valley this afternoon, I came to a point where the meadow on either side was very different.

On the right

Looks like alfalfa and a single species of grass

On the left

So much variety, I don't know all of them.

Unfortunately I couldn't show the distribution of butterflies. But I'm sure you can guess. 

I think the first is known as improved grassland. But I think it is an interesting term. Improved from who's point of view?

Mine? Definitely not.

Future generations? Who can say?

I think the UK is beginning to regret that too much of its grassland has been improved. The provision of funding to encourage "extensive" (presumably opposed to "intensive") farming practices, certainly suggests as much.

Will Slovenia soon be in the same position?

At the moment, what looks to me like "improved" grassland seems to be still relatively small patches in Slovenia.
Does anyone know what the Slovenian policy is - to encourage or discourage these?