What it is
Punjai is the counterpart classification to nanjai in Tamil Nadu's revenue records: land assessed as dry, without an assured irrigation source, traditionally rain-fed and used for crops like millets, groundnut, or other dryland cultivation. Like nanjai, the tag sits with the survey number and subdivision in the adangal, the A-register, and the patta-chitta, and it describes the land's revenue assessment rather than its current crop. Punjai land can still have a well or borewell; the classification is about the government's assessment history, not a ban on irrigation.
Why it matters when you buy
Punjai land is often cheaper per cent than nanjai in the same village, which makes it attractive for building rather than farming, but the classification alone doesn't tell you whether the plot is suitable for construction or whether conversion formalities apply. Pricing, resale value, and any conversion process can all hinge on this tag, so treat it as one data point to confirm against the actual patta-chitta and adangal entries rather than something to take on a seller's word alone.