1. Bolton, F.E., 1981, “Optimizing the Use of Water and Nitrogen through Soil and Crop Management,” pp. 231–248, In Soil Water and Nitrogen in Mediterranean-type Environments, Eds. J. Monteith and C. Webb, Martinus Nijhoff/Dr. W. Junk Publs., The Hague.
2. Cooper, P.J.M., 1983, “Crop Management in Rainfed Agriculture with Special Reference to Water Use Efficiency,” Proc. 17th Coll. Int. Potash Inst., Bern, pp. 63–79.
3. Doorenbos, J., and W. O. Pruitt, 1984, “Guidelines for predicting crop water requirements,” FAO Irrigation and Drainage Paper No. 24, FAO/UNDP, Rome.
4. Finkel, H. J., 1983, “Irrigation of Cereal Crops,” pp. 159–189, In CRC Handbook of Irrigation
5. Technology: Volume II, Ed. H. J. Finkel, CRC Press, Inc., Boca Raton, Florida.