See ESC right:

Food, adequate

Relevant ICESCR Articles:

11(2)(a): The States Parties to the present Covenant, recognizing the fundamental right of everyone to be free from hunger, shall take, individually and through international co-operation, the measures, including specific programmes, which are needed:
(a) To improve methods of production, conservation and distribution of food by making full use of technical and scientific knowledge, by disseminating knowledge of the principles of nutrition and by developing or reforming agrarian systems in such a way as to achieve the most efficient development and utilization of natural resources;

Related Documents:

Additional Protocol to the American Convention on Human Rights in the Area of Economic, Social and Cultural Rights; "Protocol of San Salvador"

Universal Declaration on the Eradication of Hunger and Malnutrition