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The tabulations entitled "Future Water Demands and Supplies on Indian Reservations-Phase I, Immediate Action Program, Phase II, Long Range Program", show the need at each reservation. Possibilities for Augmentation of Future Supplies from Present Sources Conservation of Available Water Principal possibilities of conservation of water on Indian Reservations are from the elimination of phreatophytes along the mainstream reservations and on the San Carlos Reservoir area on the San Carlos Reservation; the capture of flood flows on the Papago Reservation now wasted before reaching irrigation projects; and by lining of canals and ditches on all reservations. Improved farm practices can be applied on reservations, as elsewhere, Very probably the effects of urbanization will be noted on the Salt River Reservation in the near future. The irrigated area on this reservation is only a part of the area available for urbanization and while there may be a net savings of water on the irrigation tracts, a substantial amount of additional water will be required in the process of urbanization. Improvement of Watershed Yields. The Bureau of Indian Affaire has shown that grazing values may be increased by proper long range watershed treatment, and that accompanying the treatment there probably will be an increase in water yield. The increase in grazing values has definitely been demonstrated, but increase in water yields is more difficult to determine. Investigations by the U. S. Forest Service and Soil Conservation Service at several experimental stations have indicated that water yields will be increased when undesirable brush and timber is replaced by grass. 12Epson Perfection 4870 Photo, 400 dpi, 8 bit, 14,487,552 byte