Apr. i-Sept. IS. 1921 



Index 



599 



Page 



Rhizobium leguminosarum, critical soil re- 

 action 8s 



Root-borer, banana. See Cosmopolites sor- 

 didus. 



Rotlboellia exaltata, resistance to Sderospora 

 philippinensis 104 



Rubus — 

 alleghainensis, host of Gymnoconia inter- 



stitialis S06 



americanus, host of Gymnoconia intersti- 



iialis 505-506 



canadensis, host of Gymnoconia instersti- 



tialis S06 



cuneifolius, host of Gymnoconia intersti- 



tialis S03~5o6 



hispidus, host of Gymnoconia inter stiiialis. 505-506 

 nigrobaccus, host of Gymnoconia intersii- 



tialis 505-506 



parvifloTus, host of Gymnoconia intersti- 



tialis 505-506 



procumbens, host of Gymnoconia intersti- 



tialis 505-506 



strigosus, host of Gymnoconia inter stitialis . . 506 

 triflorus, host of Gymnoconia interstitialis . . . 506 

 ursinus, host of Gymnoconia interstitialis . 505-506 

 spp., hosts of Gymnoconia interstitialis. . . . 501-512 



Rust in Seed Wheat and Its Relation to 

 Seedling Infection (paper) 257-278 



Rust resistance in wheat crosses S23-S42 



Rutaceous plants, susceptibility to Psevr 

 domonas citri 341 



Rye, wild. See Elymus canadensis. 



Saccharum — 

 officinarum, resistance to Sderospora philip- 

 pinensis 104 



spontaneum, host of Sderospora sp 104 



Salter, Robert M., and Mcllvaine, T. C. 

 (paper): Effect of Reaction of Solution on 

 Germination of Seeds and on Growth of 

 Seedlings 73-96 



Salt, common, effect on milk and fat pro- 

 duction 124 



Salts, epsom, effect on milk and fat produc- 

 tion 124 



Sarvis, J. T. (paper): Composition and Den- 

 sity of the Native Vegetation in the Vicinity 

 of the Northern Great Plains Field Station . 62-72 



Satsuma. See Citrus nobilis var. wnshiu. 



Satsumelo, susceptibility to Pseudomonas 



"'" 3S7 



Schultz, E. S., and Folsom, Donald (paper): 

 Transmission of the Mosaic Disease of Irish 



Potatoes 31S-338 



Sderospora — 

 graminicola — 

 dissimilarity of Sderospora philippinensis. . 105 



var. andropogonis-sorghi, classification. . . 119 



javanica, hosts 10s 



maydis, suspected occurrence on teosinte ... 105 

 philippinensis, n. sp. — 



causal organism 105-122 



hosts 103-10S 



sacchari, pathogenicity on sugar cane, maise, 



and teosinte 105 



Sderostylis Hindsti. Syn. Fortunella Hindsii. 



Page 



Seed treatment, presoak method 363-392 



Seeds, germination, effect of reaction of solu- 

 tion 73-96 



Sezerinia buxifolia, immunity to Pseudomonas 



"''■' 343, 345; 347 



Siamelo, susceptibility to Pseudomonas citri. . 357 



Siamor, susceptibility to Pseudomonas citri. 357 



Silage, influence of fermentation on starch 

 content 173-179 



Smith, A. M.. and McCall, A. G. (paper): Ef- 

 fect of Manure-Sulphur Composts upon the 

 AvailabiUty of the Potassium of Green- 

 sand 239-256 



Sodium. — 

 bicarbonate, effect on milk and fat produc- 

 tion 125-130 



hydroxid, effect on germination and 



growth 74-96 



nitrate, effect on germination and growth. . 74-96 



Soil- 

 effect of calcium sulphate on solubility 47-54 



in vicinity of Northern Great Plains Field 



Station 63-64 



Psciidomonas citri in 189-206, 207-223 



Solanum titberosum — 



host of mosaic disease 315-338 



line-selection work S43-573 



Solidago pulcherrima on northern Great 

 Plains 65-72 



Solubility of soils, effect of calcium sulphate . . 47-54 



Sorghum. See Andropogon sorghum. 



Species, new 97-122, 139-172 



Starch — 

 in experimental silage, influence of fermen- 

 tation 173-179 



in frozen wheat 187 



in silage 175-178 



Stemrust. See Puccinia graminis. 



Sterility in wheat crosses 527-532 



Stipa — 



comata on northern Great Plains 63-72 



spartea on northern Great Plains 65-72 



viridula on northern Great Plains 65-72 



Storage, effect on ripening of Bartlett pears. 473-500 



Striperust. See Puccinia glumarum. 



Sucrose in frozen wheat 1S7 



Sugar-cane mosaic, artificial and insect trans- 

 mission 131-138 



Sugars — 



in Bartlett pears 480-499 



in frozen wheat 187 



in silage 174-177 



Sulphate— 

 aluminimi, effect on availability of potas- 

 sium of greensand 242-256 



calcium, effect on solubility of soils 47-54 



copper, prevention of injury to seeds by 



presoak method 363-392 



ferrous, effect on availability of potassium 



of greensand 242-256 



magnesium, effect on germination and 



growth 74-96 



physotigmine, effect on milk and fat pro- 

 duction 125-130 



potassium, effect on germination and 



growth 74"96 



