Agriculture Development Lessons from Outside US

I think the following analysis applies equally to current problems in developing nations and to the history of agriculture in the US,  particularly when you consider the South from 1865 to 1985 or so:

In our evaluations, we often see different results across different segments of farmers—even when assistance is pretty uniform. Farmers with relatively high incomes tend to leverage their access to financing and irrigation to take full advantage of training, often making dramatic gains in production and sales in just one season. In contrast, subsistence farmers and women have more difficulty improving their situations through training, given the multitude of constraints that they face. As a result, we have found income gains concentrated among the top quartile of farmers, with more than half of farmers no better off than when the program began. These findings highlight a natural tension in the sector between helping the poorest of the poor reach food security, on one hand, and helping more established producers formalize their operations, on the other.