982 



EXPERIMENT STATION RECORD. 



[Vol. 41 



Poplar — Continued. 



leaf-hopper in New Jersey, 549. 

 leaf-miner in New Jersey, 549. 

 rusts, studies, 35.i. 

 scale in South Dakota, 59. 

 I'oppies, variety tests, 242. 

 Poppy bacterial disease, studies, 54.3. 

 Pork — 



and pork products, gastric response 



to, 857. 

 and pork products, international 



trade, U.g.D.A., 892. 

 curing, 617, 488. 

 cysticercosis, notes, 879. 

 trichinae in, destruction, 684. 

 Porthetria dispar. (See Gipsy moth. ) 

 Potash — 



and phosphates, comparative value for 



grain, 825, 826. 

 determination, 504, 799. 

 different forms, comparison, Mass., 21 ; 



N.C., G25. 

 effect on barley straw, 733. 

 electi'o, fertilizing value, 326. 

 fertilizers, mining and manufacture, 



423. 

 fertilizing value, 228, 628 ; Del., 136 ; 



Me., 143. 

 for cotton, Ala.College, 336. 

 from blast furnaces, 325, 629. 

 from bracken, 629. 

 from cement dust, 518. 

 from greensand as affected by manure- 

 sulphur composts, 799. 

 from greensand, availability, N.J,, 23. 

 from kelp, 508. 

 from lake brines, 818. 

 from sea water, 723. 

 from sunflowers, 818. 

 from various sources, 518. 

 lime, fertilizing value, 724. 

 of soil and greensand, utilizing through 



soy beans, N..I., 24. 

 of soil, solubility in salt solutions, 



126. 

 omission on grass crops, N.Y. Cornell, 



21. 

 omission on meadows, Mass., 21. 

 production in Alsace, 325, 426. 

 production in Germany during war, 



519. 

 production in Russia, 818. 

 production in United States, 219, 325, 



426, 518, 628. 

 requirements of potatoes, Fla., 527. 

 residual effect, N.C., 625. 

 use on moor soils, 519. 

 world's supply, 24. 

 Potassium — 



ammonium nitrate, fertilizing value. 



424, 627. 

 chlorid works, effluent from, as ferti- 

 lizer, 629. 

 iodid, effect on sporotrichosis, 781. 

 movement in soils, 214. 

 nitrate deposits of Oregon, 817. 



I'otassium — Continued. 



nitrate, determination of chlorates in, 



803. 

 nitrate, effect on composition of crops, 



422. 

 requirements of bacteria, 523. 

 salts as soil amendments, 326. 

 salts, effect on soil solubility, Mich., 



512. 

 salts, effect on soil structure, 519. 

 sodium as substitute for, R.I., 426. 

 soil, as affected by sulfofication and 



nitrification, 324. 

 sulphate sprays, fertilizing value, 



Hawaii, 138, 148. 

 I'otato — 



Alternaria, notes, 347. 

 aphid, control, Conn. State, 158. 

 aphid, pink and green, N.J., 255. 

 aphid, pink and green, studies, Va. 



Truck, 662. 

 aphids, control, 160, 162, 255, 7.5xj. 

 beetle, Colorado, control, 532 ; Wis., 



661. 

 beetle, Colorado, notes, Fla., 548 ; 



Mont., 57. 

 beetle larvae, remedies, 662. 

 beetle, 3-lined, notes, Conn. State, 150. 

 blackleg disease, studies. Can., 543. 

 blight, resistance of varieties, Hawaii, 



137. 

 blight, treatment, 532. 

 blights, late, early, and bacterial, Fla., 



543. 

 brown fleck, internal, 451. 

 diseases and pests in North Carolina, 



532. 

 diseases, control, 51, 545, 748 ; Me.. 



143. 

 diseases, control by fall plowing, Kans., 



41. 

 diseases in Hawaii, Hawaii, 153. 

 diseases in Washington, 656. 

 diseases, notes, 154 ; Ariz., 345. 

 diseases, studies, 655, 748 ; Mich., 654. 

 flea-beetle, notes. Conn. State, 159. 

 flour, characteristics and detection, 



467. 

 " foot rot ", studies, 655. 

 Fusarium diseases, studies, Minn., 74.". 

 late blight, notes, 451. 

 late blight, studies, 748. 

 late blight, treatment. 51, 545, 748 ; 



Can., 543 ; Iowa, 245. 

 leaf-hopper, remedies, 662. , 



leaf-hopper, studies, 847, 849. 

 leaf roll and allied diseases, 451. 

 leaf roll, notes, 749. 

 leaf roll, studies, 51, 155, 247, 65G. 

 mite, notes, Hawaii, 138. 

 mosaic, studies, 247. 

 pit rot, studies, 740. 

 pomace, utilization, M(\, 142. 

 Rhizoctonia, studies, 451. 

 Rhizoctonia, treatment, 153. 

 rot, treatment, 545. 



