
From the life of Hazrat Umar (ra) bin Khattab
For the expansion of agriculture, Hazrat Umar (ra) said in relation to barren pieces of land that whoever cultivated them, it would become their property and a period of three years was designated for this. Rivers were made to flow and the department of irrigation was established, which also oversaw the formation of ponds etc.
(Al-Farooq, Shibli Naumani, pp. 209-210, Dar-ul-Isha’at Karachi [1991])
This was carried in order to better the agricultural system.