426 EXPEEIMENT STATION EECORD. 



until fall, or an average of 3.2 per cent for each plat. This calculation is 

 based on the moisture content to a depth of 6 ft." 



New work in dry farming', A. M. McOmie (Arizona Sta. Rpt. 1912, pp. 665- 

 671, fig. 1). — This article contains descriptions of soils and climatic conditions 

 at 2 dry farms recently acquired and results of the experimental work under 

 way. 



At the Prescott dry farm trials were made of varieties of cereals, field com, 

 sweet and pop corn, beans, sorghum, cotton, potatoes, alfalfa, and field peas, 

 among the most promising of which are mentioned yellow dent corn for forage, 

 the Bates and tepary varieties of beans, shallu sorghum, Coconino blue potatoes, 

 and Turkestan alfalfa. 



"Data on the best way in which to leave the surface so as to catch the'' tor- 

 rential rains deserve mention. One such storm occurred July 23, when 1.92 in. 

 fell in slightly less than 2 hours. After the first 40 minutes the country was a 

 sheet of water, gullies were rushing torrents and Granite Creek became a 

 turbulent river. Good sized streams ran down the corn, bean, and potato rows, 

 making them appear as after a heavy irrigation. On surfaces left quite level, 

 as after a haiTOw, the penetration, 40 minutes after the storm ceased, was 

 6 in. ; on surfaces checked with right angle disking the penetration was 8 in. ; 

 and on clod mulch it was nearly 11 in. Later, moisture determinations in 

 these plats showed even more striking results in favor of the clod mulch." 



It is noted that one harrowing completely destroyed young weeds, while only 

 two-thirds of those on an adjoining plat were destroyed by 2 harrowings 1 

 week later. 



At the Snowflake dry farm, pink beans yielded 204 lbs. of beans per acre, and 

 dwarf milo maize 2.468 lbs. of dry plants. Amber cane, shallu, red and white 

 Kafir corn, and teosinte and broom corn were also tried without much success. 

 Iced Kafir corn gave the highest yield, 4,820 lbs. of dry matter per acre. 



Results of cooperative work at Flagstaff show the value of Turkey red wheat. 

 White hull-less barley, wheat, oats, vegetables, and potatoes are reported as 

 being sure crops in this section. 



Observations at Tucson indicated that olives may be successfully cultivated, 

 but tepary beans, millet, milo maize, and Kafir corn failed to mature seed. 



Irrigation, cultivation, and drainage experiments, B. E. KRtJGER {Mitt. 

 Kaiser Wilhelms Inst. Landw. Bromberg, 5 {1912), No. 1, pp. 21-33). — At 

 Bromberg on a snudy soil, nonirrigated potatoes yielded 7,800 kg. per hectare 

 (6,942 lbs. per acre) and those heavily irrigated 26,300 kg. The starch con- 

 tent was 17.9 per cent with the lower yield and 21.9 per cent with the larger. 

 The average of 6 irrigation experiments showed that for each gram of dry 

 i matter produced by the tubers, 572 kg. of water was required. 



When grass was watered 6 times during the season 8,750 kg. of hay was 

 produced per hectare, as compared with 5,340 kg. when watered 3 times, and 

 2,730 kg. when not irrigated. The best yields with oats, rye, and barley were 

 obtained in seeding when the drills were placed 20 cm. (about 8 in.) apart. Oats 

 produced larger yields on using 120 kg. of seed per hectare than with 90 or 

 GO kg. Barley produced better yields with 70 kg. of seed per hectare than with 

 140 or 100 kg. Rye gave larger yields with 90 kg. than with 120 or 60 kg. 

 One hoeing in the spring apparently increased the yield of oats by 680 kg. of 

 grain per hectare; of rye only 70 kg.; and reduced the yield of barley by 210 

 kg. In regard to liter weights and single kernel weights, the 20 cm. distance 

 resulted better than the 30 cm. distance between the drills. 



In Koppenhof experiments it was shown that irrigation without fertilizers 

 was unprofitable, while fertilizing without irrigation paid. On areas fer- 

 tilized and irrigated 4 times to a depth of 50 mm., each time, beginning May 15, 



