Maize is one of the most important cereal crops in Egypt where used in animal nutrition. The research problem: with studying the economic impacts for using varieties technology of maize in Gharbia Governorate, the most of farmers cultivate many of available varieties without looking efficiency of productivity, her, we asked what is the impact application of technological methods of modern varieties of maize in Gharbia Governorate. The aim of the research: the impact of shifting the supply function, and appreciate efficiency of productivity and economic, and access to the best map of the study crop. By studying the economic impact of the cultivation of  modern varieties of  white maize on shifting the supply function in Gharbia governorate: with replace single hybrid (haitek 2030) instead of single hybrid: 10 , 130 , 128 , 323 , it has led to  shift the supply function to the right, which leads to increase the production by about 30 thousand ardebs assuming cultivation half of the area under maize in Gharbia governorate for the season 2017, its value reached about 13.5 million pounds. As for the triple varieties , it showed that by  replacing the variety triple hybrid (321) instead of the triple hybrid varieties 310, 324, 311, its productivity reached about 24.6 ardebs / feddan of 2017, the production from  50% of the total area of maize in governorate increase with  about 40 thousand ardebs, its value  about 18 million pounds, and thus the cultivation of the total area of the maize crop in Gharbia governorate with single (haitc 2030) and  triple 321 increase the production by about 70 thousand ardebs, its value about 31.5 million pounds, thus recommends with cultivate the two varieties in Gharbia governorate . With studying the economic efficiency of hybrid single white maize of seed component of the varieties mentioned that the value of the marginal product reached about 576.0, 369.9, 841.5, 399.15 pounds, while the price of each element of about 58.06, 38.58, 54.97, 30.0  pounds respectively, that means there is an economic efficiency seed element Where the value of the marginal product of the element is greater than its price in the market. But it is possible increase this efficiency until the value marginal product equals the price of element in the market. The economic efficiency of the triple hybrid of white maize of seed component of the items indicate that the value of the marginal product reached about 445.95, 147.6, 312.3, 606.15 L. E , while the price of each component reached about 20.9, 20.55, 20.45, 19.24 pounds respectively, indicate that the seed component has achieved the Efficiency Where the value of marginal product of seed component greater than its price, but it is still possible to increase the efficiency until the value of the marginal product of element equal price in the market. By studying some of the economic measures of single white maize: the percentage of the profit margin of the producer reached about 43.66% , 44.51%, 43.97% , 43.97%, 35.26% respectively, as  the rate of economic efficiency of the single varieties reached about 177.51%, 180.20%, 178.47%, 154.47% respectively, It is possible arrange single maize varieties, according to the percentage the proportion of the profit margin and the rate of Economic efficiency as follows: single Hybrid (10), single hybrid (130), single hybrid (2030), single hybrid (128) respectively. As for the triple hybrid of white maize: the percentage of the profit margin of the producer estimated about 42.20%, 22.32%, 38.55%, 38.61%respectively, and the rate of economic efficiency in triple varieties reached about 173.02%, 128.73%, 162.72%, 162.90% respectively. So it can arrange the triple maize varieties, where the percentage of the profit margin and the rate of economic efficiency as follows: triple hybrid (321), triple hybrid (311), triple hybrid (324), triple hybrid (310) respectively.
The recommendations:
1-      Replacing the single hybrid maize variety (haitc 2030) instead of the lower other varieties, where it has high productivity and has an economic efficiency in Gharbia Governorate.
2-      Replacing the triple hybrid maize variety ( 321) instead of the lower other varieties, where it has high productivity and has an economic efficiency in Gharbia Governorate.
3-      The producer company's of white maize seeds in Egypt, its must be carrying out the recommendations of this research.