Arizona Agricultural Experiment Station 



641 



mechanical analysis. 86: 97. 



Yuma Mesa. 89: 235-245. 

 Sanders cement pipe machine. 86: 86-88. 

 San Juan River: 



flood. 95: 536. 



reservoir site on. 95: 534, 539. 

 San Pedro Valley water supply. 1920: 



478-479. 

 San Simon Vallev water supply. 1919: 



451; 1920: 477-478. 

 Santa Cruz River: 



stream flow records. 1919: 450. 

 Santa Cruz Valley: 



cotton growing in. 90: 265-275. 

 Sapote, white: 



suited to Arizona conditions. 1919: 

 441; 1920: 473; 1921: 595. 

 Scab of potatoes. 1921: 612. 



treatment for. T. H. 136. 

 Scale (Parlatoria hlanchardi): 



infesting date trees. 1920: 470; 1921: 

 589. 

 Scarlett, William. 1918: 278-279. 

 Schenk cement pipe machine. 86: 82. 

 Schistocera shoshone (brown grasshop- 

 per). 87: 195. 



S. vega (green grasshopper). 87: 195. 

 Schneider, W. E. 1921: 552, 553, 573- 



575. 

 Schwalen, H. C. 86: 75; 1919: 447; 

 1920: 433, 475-479; 1921: 554, 

 597-600. 

 Scotch thistle: 



sale of seed forbidden. Cir. 40. 

 Scrub oak (Qucrcus turbinella): 



as a browse plant. 1921: 577. 

 Sedge, or Cyperaceae family of plants. 



1919: 431-432. 

 Seed: 



certification work. 1920: 446-447: 

 1921: 571. 



corn maggot. 1921: 584. 



Law, Uniform. Cir. 40. 



mixtures, label re(4uirements. Cir. 40. 



testing. Cir. 40. 

 Seeding, rate of: 



cotton. 90: 266, 275. 



Sudan grass. Cir. 35. 



sweet clover. Cir. 34. 

 SELECTING LAYING HENS. Cir. 39. 

 Service berry (Amclanchier): 



as a browse plant. 1921: 578. 

 Sesbania. 89: 263. 

 Sewer pipe: 



causes of failure. 86: 169. 



cement. 86: 94, 153-157, 171. 



vitrified. 86: 155-156. 



Sheep: 



feeding experiments. 1919: 422-423; 



1921: 575. 

 wool from. 1918: 329-330; 1920: 449. 

 yucca as emergency feed for. 1918: 

 324. 



Shepherdia argentea. 1920: 473. 



Sherman cement pipe machine. 86: 

 81-82. 



Sherman, F. W. 86: 75. 



Side-oats grama (Bonteloua curtipen- 



dula). 1919: 411, 430. 

 Silage (see ensilage). 



Simmons, F. H. 1918: 281; 1920: 429; 



1921: 551. 

 Siphons, inverted, under rivers. 86: 95, 



162-163. 

 Slip. joints, in cement pipe. 86: 109. 

 Smilo grass. 1919: 419. 

 Smith, G. E. P. 86: 70-171; 88: 207- 

 221; 92: 397-423; 95: 529-546; 

 1918: 282, 351-358; 1919: 399, 401, 

 447-455 ;1920: 431, 433, 475-479; 

 1921: 552, 554, 597-600. 

 Smut: 

 covered, of barlev. 1920: 445; 1921: 



611. 

 stinking, of wheat. 1919: 417; 1920: 

 445. 

 Snapdragon, rust of. 1921: 615. 

 Sneezeweed, western : 



poisoning range sheep. 1918: 299. 

 Soapweed, or palmilla, or Spanish dag- 

 ger (Yucca elata) : 

 as emergency forage. 1918: 298, 299- 



300. 324. 

 chemical composition. 1919: 411. 

 Soils: 

 alkaline: 



favorable to growth of potato scab 



organism. T. H. 136. 

 reclaimed by leaching. 1919: 406- 



407. 

 studies. 1918: 341-345; 1919: 404- 

 409; 1920: 436; 1921: 557-559. 

 dr}', swelling coefficient of, when 



wetted. 1921: 557. 

 effect of, on irrigation. 88: 216, 220, 



222. 

 effect of, on stand of cotton. 90: 268. 

 effect of, on transpiration ratio. 88: 



208. 

 improvement: 

 by irrigation. 89: 262-263. 

 by sweet clover. Cir. 34. 

 inoculation of. Cir. 34. 

 of the Salt River Vallev. 85: 11. 

 of the Yuma Mesa. 89: 234-245. 



