360 
THE FUTURE OF ARID LANDS 
Water ‘‘O” 
Early Close Grazing 
First Year 
Water “O” 
Early Close Grazing 
Second Year 
Water ‘‘O” 
Early Close Grazing 
Third Year 
Figure 2. Standard seasonal grazing rotation plan. 
the crop when most advantageous. This calls for at least three 
subdivisions of the range. Each subdivision is grazed heavily one 
year out of three at the time of maximum flush of growth to con- 
trol the undesirable species as outlined by Jones and Love (33). 
This system has been further discussed by Love (40) and Murphy 
et al. (§2) (see Figure 2). Jones (formerly Extension Agronomist) 
and Love made a survey of hundreds of test plots in California 
in 1942 and 1943. They had been seeded in the years 1937 to 
1942 by the Agricultural Extension Service under a program 
designed by B. A. Madson and Jones. (It is a pleasure here to pay 
tribute to these two men who started to teach Californians that 
there are differences in grasses). This survey showed that many 
more failures could be attributed to exclusion of livestock (i.e., 
protection) than to excessive grazing. In the protected plots the 
weeds gained control. These observations have been amply veri- 
fied since. 
Special problems. In California, as in some other regions, 
brush is an undesirable plant that reduces forage yields. Fire, 
herbicides, and mechanical equipment may be used alone or in 
combination to get rid of the brush in preparation for revegetation 
by desirable grasses and legumes (41). 
Development of Program of Revegation 
Two aspects of a development program are private and public. 
The individual owner must decide on the program to be de- 
