The UN has always played a major role in looking for solutions to world hunger. HeinOnline provides access to full text of their resolutions, multi-lateral treaties and other useful publications. Here again you will find retrospective depth back to the late 50s. The designation as a "law collection" often causes this source to be overlooked but it is an excellent source of infomation on world hunger and attempts to cope with it internationally.
Another database you will find useful for primary source material is ProQuest Congressional Search. You can find full text of any congressional action or debate related to U.S. actions on hunger, food supply, foreign aid, etc.
Government reports and publications
NTIS serves as the largest central resource for government-funded scientific, technical, engineering, and business related information available today. For more than 60 years NTIS has assured businesses, universities, and the public timely access to approximately 3 million publications covering over 350 subject areas, including agriculture and food.