I admit seeing a room with plants on a Romulan Warbird is....odd. A cloaking device makes much more sense. I hope there will be a proper TNG interior with the torture room/prison/cloaking device etc. as an alternative.
Unless it is possible to grow some horrendously dense protein supplement, there is effectively no way to grow crops aboard a ship and make a substantial dent in the food use. Using that much volume of the ship for inefficient storage would be silly. Best use the space for tightly packed MRE type goods or raw replicator resources.
We already have hydrofarming technology that can produce three times the volume in a third of the time with 90% less water use and a fraction of the fertilizer of land-based farming, the only reason we're not transitioning completely to that method of food production is mindless traditionalists and agri-combine lobbyists insisting on farming subsidies.
Combined with genetically enhanced crops and three hundred years of technological advancement, I'm pretty sure that Trek hydro/aeroponics would be capable of feeding a ship's crew, or at least providing a substantial amount of fresh produce to supplement emergency ration packs in the event of replicator failure.
Regardless, this room does seem more like a botanical lab than a food production facility, based on size alone.
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