INDEX 



Page 

 Acetate, caldum, method used in determin- 

 ing soil acidity 322-329 



Achoricm Schonleinti, causal organism of 



favus 41S-418 



Acid — 

 amino, in normal and blighted spinach. . 385-404 

 hydrochloric, used in — 



analyzing greensand 485 



determining water-soluble nitrogen in 



spinach 397-404 



hydrofluoric, used in analyzing greensand . 489 



lactic, in alfalfa silag 581 



nitric, used in experiments with plowsole . . 508 

 nitrohydrochloric, used in experiments with 



plowsole 507 



phosphomolybdic, used in determining 



nitrogen in spinach 399-434 



phosphotungstic, used in — 

 determining basic nitrogen in spinach . 399-404 



titration of silage extract 130-13 1 



stilphuric, used in — 



damping-off experiment 536 



determining basic nitrogen in spinach . 399-404 

 Acidity of — 



alcoholic extract of silage 116-125 



dioxogen 140-141 



hydrogen peroxid 140-141 



plant sap, changes during freezing 98-101 



seeds, effect on catalase activity 141-143 



silage 574, 581 



soil, effect of moisture 32t-329 



water extract of silage 1 16-125 



Acid-producers in alfalfa silage 574-593 



Acids — 

 diamino, in healthy and blighted spinach . 399-404 

 tolerance of larvseof Trichinella spiralis to. 477-479 

 AcTomoniella sp., fungus isolated from Ipo- 



nuBa batatas 364 



Actinomyces sp., fungus isolated from Ipo- 



maa batatas 364 



Adams, J. M. R., etal. (paper): Sweet-Potato 



Storage-Rots 337-368 



Adelphocoris raptdus, attacking clover 181 



Adobe soil, inorganic colloids 516 



Aegte marmelos, immvmity to Pseudomonas 



citri 662-665 



After-ripening of seeds, effect on — 



catalase activity 138, 149-159 



oxidase activity 163-166 



Agriotes mancus, larvae, effect of hydrocyanic- 

 acid gas on 134-136 



Agropyrcm — 



coninum, source of Puccinia graminis tritici 



transferred to scmicongenial hosts 242 



cristatum — 

 source of Puccinia graminis in bridging' 



host experiment 332 



source of Puccinia graminis tritici trans- 

 ferred to semicongenial hosts 142 



Agropyrcm — Continued Page 

 repens — 

 source of Puccinia graminis in bridging- 

 host experiment >. 228 



susceptibility to Puccinia graminis tritici. 224 

 smithii — 

 susceptibility to Puccini graminis tritici. . 224 



used in bridging-host experiment 231-249 



tenerum — 

 source of Puccinia graminis tritici trans- 

 ferred to semicongenial hosts 241 



susceptibility to Puccinia graminis tritici. 224 

 Agrostis — 



aiba, source of Puccinia graminis agrostis 



transferred to uncongenial hosts 245 



stolonifera — 

 source of Puccinia graminis in bridging- 

 host experiment 228 



source of Puccinia graminis agrostis trans- 

 ferred to uncongenial hosts 245 



Albuminoid nitrogen in silage 129-132 



Alcohol — 

 in silage — 



caused by zymase 590 



released by enzymic and yeast action. . 589-590 

 tolerance of larvae of Trichinella spiralis 



to 477-479 



Alcoholic extract of silage — 



acidity 116-125 



method of making 115 



Alfalfa- 

 effect on plowsole 507 



hay — 



digestibility 371, j8» 



methane fermentation 374-275 



net energy value 269-286 



silage — 



bacteria in 571-592 



comparison with sweet-clover silage. . . 113-132 

 Alkali- 

 effect of soil factors on toxity 287-319 



salts, relative toxity 315-3:8 



Alleys, effect on border rows in plot tests. . 351-262 

 Alisma spp., nature of dormancy of seeds. . . . 138 

 Alternaria sp., isolated from — 



dead conifers 548 



Ipomoea batatas 348, 355 



Aluminum — 



in mulch, plowsole, and subsoil 508-509 



oxid in— 



mulch, plowsole, and subsoil 508-516 



normal and blighted spinach 37I-37S 



soil, effect of drying 315-358 



Am^ranthus — 

 blitoides, catalase content of seeds. . . . 144, 153-154 



graecizans, catalase content of seeds 153-154 



retro/Uzus. catalase content of seeds 144, 149, 



153-161 

 spp. nature oi donnancy of seeds 138 



(667) 



