DESCRIPTION OF PLATES. 



Plate I. Fig. 1.— A general view of tlie Sau Juau County Arid Farm, a 40-acre 

 farm maintained by the State of Utali for experimental purposes, located 

 at Verdure, near the town of Monticello. This is one of six farms main- 

 tained by the State for similar purposes. The vegetation in the foreground 

 is chiefly black sage, while the trees are juniper. Fig. 2.— A field of wheat 

 in shock on land adjacent to the San Juan County Arid Farm. This field 

 was covered with black sage two years ago. 



Plate II. Fig. 1. — Field showing the type of summer fallow maintained in 

 every other series on the San Juan County Arid Farm. This serves at once 

 to kill out weeds, conserve moisture, and promote humification in the soil. 

 Fig. 2. — The interior of an alfalfa plat on the San .Juan County Arid Farm. 

 This alfalfa had been cut once and the plants in the interior of the plat 

 made no second growth, while those along the margin next to the well- 

 cultivated roadway were ready for a second cutting at the time shown in 

 this illustration. 



Plate III. Fig. 1. — A poor crop of wheat on the Sevier County Arid Farm, 

 Utah. The failure of this crop was apparently due chiefly to a lack of 

 proper tillage during the previous season. Fig. 2.— A crop of wheat grown 

 without irrigation in the Cache Valley, Utah. This land has been produc- 

 ing a crop of wheat every other year for thirty-five years. (Photographed 

 by Mr. Charles J. Brand, 1906.) 



Plate IV. Fig. 1. — Harvesting wheat grown without irrigation near Nephi, 

 Utah. A header like that shown will harvest about 2.5 acres a day. 

 (Photographed l)y Mr. Charles J. Brand. 1906.) Fig. 2.— A hillside garden 

 in a semiarid region, showing one of the settling ditches used to catch and 

 hold the water which runs off the hill above. 



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