I don't know if you read the relevant parts in the article I was linking to in my diary. Summarizes well what would be necessary :

In order to allow all farmers in the world to construct and cultivate sustainable ecosystems, capable of producing a maximum of good quality products without degrading the environment, it is absolutely necessary to put an end to the international agricultural prices war. It is necessary to break with the trade liberalization which tends to bring prices into line with the lowest offers from surplus exporters. It is above all necessary to guarantee sufficiently high and stable prices to farmers, in order for them to live from their work with dignity. To this end it is necessary to create a much more equitable and much more effective organization for international agricultural trade than the one which is currently in place. A new organization that would be based upon the following principles :

• establish large regional common agricultural markets, by regrouping countries having similar levels of agricultural labour productivity (West Africa, Southern Asia, Western Europe, Eastern Europe, North Africa and the Middle East, North America, etc.) ;
  
• protect these regional markets against all imports of low-priced agricultural surpluses by variable customs duties, thus guaranteeing high and stable enough prices to poor farmers from disadvantaged regions, so as to allow them to live from their work and to invest and expand their business operations ;
  
• negotiate, product by product, international agreements fixing in an equitable manner an average purchase price on the international market, as well as the quantity and the export price allowed to each of these large markets, and if necessary, to each country.

The rise in agricultural prices will have to be gradual, so as to avoid negative consequences for poor consumers-buyers. In spite of this, it will probably be necessary to implement food aid policies. But, instead of founding these policies on low-cost food distribution, which maintains peasant misery and reduces domestic markets, it will be convenient to support the food purchasing power of poor consumers, so as to expand domestic markets. Therefore, food aid policies could rely on food stamps, financed by state budgets or international aid, distributed to the needy and for free for the poorest, and exchangeable for food (as in the United States).

Also, the larger book that exposes this solution in detail is partly available on googlebooks : A History of World Agriculture By Marcel Mazoyer, Laurence Roudart. A very interesting book, very informative about the history of agriculture, its various means of production, its evolution...

Un roi sans divertissement est un homme plein de misères