Aayirappara literally translates to 1000 'para', where 'para' is a unit for measuring rice, one 'para' equals 7.5 kgs. In the movie it is a reference to the Aayirapara paadam(the field that yields a thousand paras or a field of bumper harvest.)
Directed by Venu Nagavalli, the film is set in the rice trough of Kerala - Kuttanad, incidentally it is also his native place(Ramankarry). The movie dabbles in history, it is a period piece, my guess is the story is from the early 1960s, around the time when the first Communist ministry came to power in Kerala.
Aayirappara paadam is owned by the benevolent landowner, played by Narendra Prasad and his faithful servant, Pappi. - a role veteran actor Madhu carries of with ease. The central character in this movie is the colorful Shauri, Pappi's son, played by Mammootty in perhaps the only Venu Nagavalli(directed) movie where Nagavalli chose someone else other than Mohanlal to play the lead.
The film portrays the tumultuous period of economic and social change in Kerala, where the land and the earnings from the land started to be distributed more democratically, religious tolerance increased albeit as a result of numerous sacrifices from the people involved. Actress Urvashi has the female lead, as the daughter of the landlord. Music is composed by Raveendran and one of the songs 'Yathrayaayi' is quite a melodious number.