References
- Rep. Dep. Agric. Kenya (1955). Vol. II—Record of Investigations, p. 227.
- Rep. Dep. Agric. Kenya (1961). Vol. II—Record of Investigations, p. 137.
- Rep. Tanganyika Agric. Corp. (1956–57). pp. 28 and 52–53.
- Rep. Dep. Agric. Tanganyika (1958). pp. 10–11.
- Hutchinson, J. B., Manning, H. L. and Farbrother, H. G. (1958). Crop water requirements of cotton. J. agric. Sci. 51, 177.
- Peat, J. E. and Brown, K. J. (1960). Effect of management on increasing crop yields in the Lake Province of Tanganyika. E. Afr. agric, for. J. 26, 103.
- Rep. Dep. Agric. Kenya (1957). Vol. II—Record of Investigations, p. 173.
- Rep. Dep. Agric. Kenya (1957). Vol. II—Record of Investigations pp. 124, 154.
- Rep. Dep. Agric. Kenya (1958). Vol. II—Record of Investigations, p. 121.
- Rep. Dep. Agric. Kenya (1959). Vol. II—Record of Investigations, p. 155.
- Rep. Dep. Agric. Kenya (1960). Vol. II—Record of Investigations, p. 113.
- Birch, H. F. (1960). Soil drying and soil fertility. Trop. Agric., Trin. 37, 3.