GEAZING EANGES IN SOUTHERN ARIZONA. 27 



It is thus shown that while the growmg season began a little earlier 

 in 1911 and in 1914, there was sufficient rainfall each summer to pro- 

 duce the normal crop. But there is no continuous diminution of the 

 precipitation from the first of the period to the last of it. In fact, 

 1914 was the rainiest year of the five, though all the plats show the 

 least production during that year. 



THE WEIGHT OF ARIZONA RANGE-GRASS HAY IN THE STACK. 



The method used for the measurement of hay in stacks is to com- 

 pute the volume of the stack and divide this result by the volume which 

 weighs a ton of the given kind of hay. In computing the weight 

 of Arizona range-grass in the stack, no data for obtaining this 

 volume were available. In 1912, however, an opportunity for a single 

 record was offered. That fall the press of other work made it necessary 

 for Proctor to stack his hay and bale it later. The hay from 22^ 

 acres was stacked and measured. In March, 1913, the stack was 

 measured again and the hay was baled and weighed. Using the 

 FOWL rule for computing the two volumes of the stack and 

 dividing each by the total weight of the hay, it was found that of the 

 newly stacked hay 861 cubic feet weighed 1 ton, while only 657 cubic 

 feet of the old hay weighed as much. Since the first measurement 

 was made when the hay was first stacked, it was assumed that 800 

 cubic feet of hay in the stack standing less than 30 days would 

 weigh approximately 1 ton, and this factor was used in our com- 

 putations. So far as the w^riter has been able to learn, this is the 

 first record of definite measurements for the actual weight of Arizona 

 range-grass hay in the stack. 



THE COST OF MAKING RANGE HAY ON THE SANTA RITA RESERVE. 



Only one set of records as to the cost of making range hay on this 

 reserve has been obtained. In 1914 an area of 114.2 acres was mown 

 which yielded 45.36 tons of hay. The crew required for the work 

 was 8 men, a cook, and 6 horses. The machinery equipment 

 consisted of 2 mowing machines, one 1-horse rake, one 2-horse 

 buck rake, a baler, and 2 wagons, with the necessary harness, water 

 barrels, and hand tools. The wages paid the men ranged from 

 75 cents to $1.25 per day and board, each man furnishing his own 

 bedding. Allowing 25 cents a day per man for food, the total cost 

 for food was $35. The grain and provisions came from the farm of 

 the operator. The horse work done was as follows: 24 horse-days 

 mowing, 12 horse-days raking, 20 horse-days bringing the hay to 

 the baler, 20 horse-days baling, and 6 horse-days coming to the 

 reserve, besides the necessary trips for water (3 miles and return for 

 a load). The work required 12 man-days for the mowing, 12 man- 



