This consultancy continued and completed the development and application of a computer-based analytical system or "model," for use in analysis of irrigated perimeters in the region of Bakel, Senegal. Tasks undertaken were, in order of priority, the preparation of an engine of analysis; the training of a Senegalese economist in the use of the model, and lastly, the actual analysis of irrigated perimeters. This report says more about the actual analysis than the stated priority would justify, because the analysis that was done demonstrates as well as tests the model; what it will do and what it can find out may be the best explanation of what it Is.