Tapu (Ottoman law)
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In Palestine, the Turkish word "tapu" was pronounced "tabu" by the Arabs,  and had been carried over into hebrew as such.
The family head acquired the usufruct of the land and was able to transmit this right to his male descendants upon his death. In return, he pledged to cultivate the land on a continuous basis and to meet a series of fiscal requirements and obligations to fulfill specific services to the state or to the sipahis.
Tapu is the basis of the Ottoman agrarian system revolving around family-scale units called çifthane.
İNALCIK & QUATAERT, An Economic and Social History of the Ottoman Empire, 1300-1914, Cambridge, Cambridge University Press, 1994. ISBN 0-521-34315-1