356 



Journal of Agricultural Research voi. xvi 



Pseudomonas — Continued. Page 



putida, nonliquefier 337 



pyocyanea. See Pseudomonas aeruginosa. 

 Puccinia — 

 andropogonis, change of morphology with 



change of host 44-77 



ellisiana, change of morphology with change 



of host 44-77 



graminis — 



morphology 43-77 



new biologic forms 103-105 



agrostis, morphology of urediniospores. . . . 48-77 



avenae, morphology of urediniospores 46-77 



phleipraiensis, morphology of uredinio- 

 spores 48-77 



secalis, morphology of urediniospores. . . . 48-77 



tritici, morphology of urediniospores 45-77 



triiici-compacti, morphology of uredinio- 

 spores 48-77 



triticina, variation in biologic forms 105 



Radio-active material, effect on tolerance of 

 barium carbonate and strontium carbonate 



by wheat 187-188 



Rations, cooked and uncooked, effect on 



White Leghorn chicks 306-309 



Red clover. See Trifolium pratense. 

 Rhizophora mangle, host of Chrysobothris tran- 



quebarica 15 5-164 



Rumex — 



acetosa, host of Pegomyia calyptrata 230 



crispus, host of Pegom,yia spp 329-244 



oblusifolius, host of Pegomyia spp 229-244 



Rye. See Secale ccreale. 

 Salts- 

 effect on nitric nitrogen in soil 107-135 



toxity to nitrifying organisms 129-135 



Schwartz, Benjamin (paper): A Blood-De- 

 stroying Substance in Ascaris lumbricoides 253-258 



Secale cerealc, host of Puccinia graminis 43-77 



Silica in com grown with barium and stron- 

 tium compounds 192 



Silica-potash ratio in ash of spinach 22-25 



Silt-loam soil, elTect of organic matter on 



water-holding capacity 263-278 



Slag, basic, effect on ash content of spinach. . 15-25 

 Snyder, Thomas E. (paper): Injury to Casua- 

 rina Trees in Southern Florida by the Man- 

 grove Borer 155-164 



Soda in com grown with barium and stron- 

 tium compounds 193 



Soda-potash ratio in ash of spinach 23-25 



Sodium — 

 carbonate, effect on nitric nitrogen in soil 110-135 

 chlorid — 

 effect on — 



ash content of spinach 15-25 



nitric nitrogen in soil 1 10-135 



in spinach 17-25 



nitrate — 

 effect on — 



ash content of spinach 15-25 



nitric nitrogen in soil 110-135 



sodium content of spinach 15-25 



in spinach 17-25 



sulphate — 

 effect on — 



ash content of spinach 15-25 



nitric nitrogen in soil 110-135 



in spinach 1 7-25 



Soil — Page 



acid, effect of lime, fertilizer, crops, and 



moisture on nitrification 27-42 



effect of salts on nitric-nitrogen accumula- 

 tion 107-135 



freshly manured, relative numbers of non- 

 spore-forming and spore-forming bac- 

 teria 318-322 



silt-loam, effect on organic matter on water- 

 holding capacity 263-278 



Soil moisture, effect on morphology Puccinia 



graminis 71-77 



Soil solutions, ash absorption of spinach from. 15-25 

 Soja max, tolerance of barium and strontium 



compounds 193-194 



Solamimtuberosum,,iusariiaa-hhght 279-303 



Solubility of Linie, Magnesia, and Potash in 

 Such Minerals as Epidote, Chrysolite, and 

 Muscovite, Especially in Regard to Soil 



Relationships (paper) 259-261 



Soybean. See Soja max. 



Species, new 219-228 



Spina cea oleracea — 

 ash absorption from concentrated soil solu- 

 tions 15-25 



host of Pegomyia calyptrata 230 



Spinach. See Spinacia oleracea. 

 Spring wheat. See Triticum aestivum. 

 Stakman, E. C, and Levine, M. N. (paper): 

 Effect of Certain Ecological Factors on the 

 Morphology of the Urediniospores of Puc- 

 cinia graminis 43-77 



Stakman, E. C, Levine, M. N., and Leach, 

 J. G. (paper): New Biologic Forms of Puc- 

 cinia graminis 103-105 



Stemrust. See Puccinia graminis. 

 Strontiiun — 



carbonate, effect on growth of wheat 190-191 



compounds, effect on plant growth 183-194 



nitrate, effect on growth of winter wheat. . 188-189 

 sulphate in corn grown with barium and 



strontium compounds 193 



Sulphate — 

 ammonium, effect on nitrification of acid 



soils 27-42 



barium — 



effect on plant growth 183-194 



in corn grown with barium and strontium 



compounds 193 



calcium, effect on nitric nitrogen in soil. . . 114-135 



ferric, effect on nitric nitrogen in soil 118-135 



iron, effect on germination of Irish potatoes . 298 

 magnesium, effect on nitric nitrogen in 



soil 115-135 



manganous, effect on nitric nitrogen in 



soil 1 16- 135 



nicotine, effect on germination of Irish pota- 

 toes 298 



potassium, effect on — 



ash content of spinach 15-25 



nitric nitrogen in soil 112-135 



sodium — 

 effect on — 



ash content of spinach 15-25 



nitric nitrate in soil 110-135 



in spinach 17-25 



strontium, in com grown with barium and 

 strontium compounds 193 



