Just hiked through the rice fields in northern Italy (Western Po Valley). They mostly apply alternating wet and dry irrigation. The water is supplied by an elaborate canal system (when it’s not raining cats and dogs). Sometimes a field is completely wet, sometimes it is completely dry, and in between there is drying mud. By the way, they treat corn fields in much the same way. All other farmland is used for wood production, with areas of planted trees needing maybe 15 years to grow tall enough.
I think they mostly use landuse=farmland without further specification, in the area. Could be a wrong impression though, I didn’t do a thorough search.
I don’t know how -if at all- this would fit in with the proposed tagging.