54 DRY LAND FARMING 



prising more than one-third of the whole, it is more than 

 40 inches. 



In Texas the average annual precipitatio*n is 31.65 

 inches, the maximum 52.1 and the mimimum 9.8. 

 Approximately four-fifths of Texas has an annual pre- 

 cipitation of 20 inches and over, and much of the far 

 eastern portion has more than 40 inches. The exception 

 comprises two or three tiers of counties on the western 

 side. Only in about six counties in the extreme south- 

 west is it less than 15 inches. 



In New Mexico the average annual precipitation is 

 13.38 inches, the maximum 25.1 and the mimimum 5.1. In 

 nearly all the western half of the state the rainfall is 

 less than 10 inches, and in the larger portion of the east- 

 ern half it is more than 15 inches. In some areas -in the 

 central western portion the precipitation is from 12 to 

 15 inches, but in the extreme northwest and southwest 

 the precipitation is very light. Several areas in the 

 west are really arid, and this aridity is aggravated by the 

 large evaporation. 



In Colorado the average annual precipitation is 15.91 

 inches, the maximum 50.5 and the minimum 6.6. Only 

 in one county, Gunnison, is the precipitation 50 inches, 

 and curiously enough, in another part of the same coun- 

 ty, it is only 9 inches. The second highest precipitation 

 recorded is 28.7. In Colorado the areas of high and me- 

 dium precipitation are very irregularly distributed, owing 

 in some degree doubtless to the eccentricities of direction 

 in the mountain ranges. Generally the precipitation over 

 15 inches is found in the north central and eastern coun- 

 ties, between 10 and 15 inches in certain of the central 

 counties, extending from the southwest to the northwest, 

 and under 10 inches in several of the southwestern coun- 

 ties, a few of which may be classed as arid. 



In Wyoming the average annual precipitation is 

 13.53 inches, the maximum 18.8 and the minimum 5.8. 



