10 BULLETIN 588, U. S. DEPARTMENT OF AGRICULTURE. 
and under such conditions the conversion of grass into meat is gen- 
erally inefficient. 
At best, it is dificult to provide enough water on the Jornada 
Range Reserve and on other ranges throughout the Southwest. Lack 
of natural surface water, high cost of boring and maintaining wells, 
uncertainty of obtaining rain and flood water to fill storage tanks, 
and low carrying capacity of the range lands all stand in the way. 
In planning the system of water supply provision should be made first 
for a few permanent watering places which can be relied upon without 
fail in time of drought. With these as a nucleus the system should 
be extended by the construction of enough tanks or other develop- 
ment works to provide for reasonably efficient use of all forage during 
average years. This may appear to be faulty advice, since in time of 
drought all the range is needed to tide the stock over; but the expense 
of providmg enough deep wells to insure the proper use of the range 
is not always justified by the number of stock the range will carry. 
Observations on the Jornada Range Reserve to date indicate that 
fairly good utilization of plas and mesa range can be secured when 
the stock do not have to travel more than 23 miles to water. This 
would mean permanent watering places 5 miles apart, or one to 
approximately 13,200 acres. On the range where grama grasses 
predominate this acreage under fence would carry approximately - 
500 head-of cattle. A deep well equipped with pump, windmill, 
gasoline engine, and storage tank costs from $2,500 to $5,060, 
depending upon depth of well and current prices of materials and 
equipment. Add to this the investment in land, if privately owned, 
and the cost of fences and other improvements, and the total capital 
invested per head of stock would approximate $100. 
As the distance between watering places increases above 5 miles, 
grazing becomes perceptibly uneven, with a varying degree of over- 
grazing around water and undergrazing beyond 24 miles from water. 
Table I and figure 1 show that on tho unfenced range under study 
the greater part of the vegetation had been killed out for a distance 
of 1 mile around the watering place, that the total vegetation in the 
first 2 miles from water is about 50 per cent of what it once was and 
contains) a large number of poor forage species, that on the area 
represented by the second 2 miles from water the total vegetation 
is about 73 per cent of what it should be, with a still large percentage 
of poor forage plants, and that beyond 4 miles from water the range 
is in about normal condition. 
Obviously, the damage to the range in this case enact reduces 
the carrying -eapacity. The loss of both cows and calves during the 
summer of 1916 was much greater on the adjoining open range than 
on the Jornada Reserve, where feed was available within a few miles 
from water. Cases were observed on the outside range where, after 
