The building and equipment of an agricultural laboratory and the publication of the present Report have been rendered possible by the generosity of Mr.

Otto Beit.

We are indebted to Dr. William Beam, Research Chemist, and to Mr. G. A.

Freak, Assistant Chemist, Wellcome Laboratories, Khartoum, for all analytical determinations recorded in the following pages ; to Messrs. G. E. Hunt and J. Barty, Lecturers in Civil Engineering, Gordon College, for numerous surveys, plans, specifications and technical guidance ; to Messrs. G. H. Grabham and S. C. Dunn, Government Geologists, for a preliminary survey of the farm site and subsequent investigations of soils, water-levels and drainage problems ; and to Mr. H. H. Eang, Government Entomologist, for valuable assistance in the control of insect pests.

Messrs. R. Hewison, Assistant Director of Agriculture, and W. A. Davie, Inspector of Agriculture, have always placed at our disposal their very extensive experience of local agricultural conditions, and have in many ways contributed to the progress of our undertakings. Timely assistance proffered by the Director of Steamers has, on several occasions, relieved a crisis in irrigation arising from engine trouble, while any measure of success obtained from the organisation of native agriculture must be attributed in large part to the invaluable co-operation of Mr. P. Munro, Inspector of the District.

E. R. SAWER.

1st November, 1915.