The model farm, which is a demonstration block that covers 10,000 acres was to be completed by 2018.
About 7,000 acres have been cultivated to date with 3,000 acres farmed last year.
A committee of principal secretaries tasked with implementing key national projects has expressed satisfaction with the progress at the controversial Galana-Kulalu irrigation scheme, revealing that it will push for release of Sh600 million for its completion.
The National Development Implementation Technical Committee (NDITC) chaired by Interior Principal Secretary Karanja Kibicho said progress at the one million-acre irrigation project was satisfactory and requires the necessary funding to move it to the next level.