As I understand it the result of monoculture soil damage is not in detectable nutrition of the crop but less yield due to reduced hardiness, slower growing, sus

As I understand it the result of monoculture soil damage is not in detectable nutrition of the crop but less yield due to reduced hardiness, slower growing, susceptibility to pests & pathogens. I know very little about rice cultivation but the flooded fields system has very different cycles and feedback from dry land grain cultivation. It varies a lot by region but rice paddies are entire ecosystems, with specific fish & eels introduced to control pests and enrich the fields. At least for the first few years iirc rice cultivation itself actually somewhat terraforms the land, improving it for rice cultivation. I'm sure there are drawbacks, caveats, and limits on that but I don't know what they are. I suspect you'd need to be a dedicated rice crop expert to have a truly informed understanding of it.