Mechanization (modernization, reform) of agriculture would make an interesting thematic collection, especially if you could find a few stamps without tractors.
You could even limit it to stamps that specifically touted a Green Revolution ... perhaps a few of those featured test tubes?
But I wonder what this design was trying to convey? ...
https://www.stampcommunity.org/uplo...26_image.jpg ... the happy end of bucolic village life?
Even collectivists living in collectives need a roof over their heads.
Cheers,
/s/ ikeyPikey