The research aims to study the economic impact of the variety change on the transmission of the supply function for the rice crop, and to determine the amount of increase in production by replacing low-yielding varieties with high-yielding 
varieties, in addition to economic evaluation. One of the most prominent results is that replacing the varieties (Sakha 101, Sakha 104, Sakha 106, Giza 178, Giza 179, Giza 177, Hajin Misr 1, Sakha 107) It leads to an increase in total production 
by 4.05 million tons, with an estimated difference of about 653 thousand tons over the previous types, and it is possible 
to save an area estimated at about 176.64 thousand acres in addition to saving an amount of irrigation water amounting to about 121.35 million m3, as it was shown that it By replacing the study varieties with the high-yielding Sakha 108 variety, it leads to an increase in total production by 3.93 million tons, with a difference estimated at about 533 thousand tons, and it is possible to save an area estimated at about 14.42 thousand acres, in addition to saving an amount of irrigation water amounting to about 18.55 million m3. For the average period (2020-2022). The study recommends applying the technology of high-yield varieties by replacing the Super 300 variety and the Sakha 108 variety, which have high productivity and a high net yield. These varieties also save more irrigation water than other rice varieties, which can be used to grow other strategic crops.