I’m trying to determinate the ABG (above ground biomass) using the random forest algorithm (and R package) on my data set. And it seems that the package can handle only few categories (when I have 53). Is there anything to do to make it work?

I’m trying to determinate the ABG (Above ground biomass) using the random forest algorithm (and R package) on my data set. And it seems that the package can handle only few categories (when I have 53). Is there anything to do to make it work? I have read some articles about predicting ABG using RF package so I’m suprised if its not possible. I always used it with only few class so I don’t really know what to do.