As usual, the devil is in the details. Some of these farms will dramatically increase the numbers of jobs available along with importing a lot of technology and knowledge for the local farmers.



Keep in mind that "experimental farms" in the more developed countries have spread agriculture technology to the local farmers, but these aren't common in the areas discussed. These large farms will be hiring and training local people in what is required for highly productive modern farming, ranging from chemical analysis of the soils and corrections of that chemistry to modern irrigation and management practices.



For many of these farms to do well, they must become involved in infrastructure improvement that will help everyone. The cost of these "support services" are factored into the economic analysis (cheaper land vs higher infrastructure costs) that would determine the project size. The minimum project size to justify upgrading a road or adding agricultural water distribution systems can be very large.



The real questions are far more complex that presented in this article.