970 



EXPEBIMENT STATION RECORD. 



[Vol. 37 



Page. 



Pomegranate, acid content 715 



Pomelos. (See Grapefniit.) 



Pomology, valuable unpublished work on . . . 41 



Poplar borer, studies, N.Y.Cornell 464 



Poria hypnlaterita, studies 458 



Pork as affected by peanuts, Tex 367 



PoTtheiria dispar. (See Gipsy moth.) 



Porto Rico- 

 Federal Station, notes 300 



Insular Station, notes 98 



Insular Station, report 298 



Pot culture work, equipment for, N.Y. State . 521 



Potash— 



as a cement mill by-product 817 



availability in feldspar 522 



availability in New Jersey soils, N.J 629 



determination 504, 712 



extraction from muscovite 505 



extraction from silicate rocks 427 



fertilizers, comparison 135 



fertilizing value 521 



fertilizing value, Me 636 



from artificial zeolite 322 



from beet sugarhouse waste liquors 817 



from biotite and similarsilicates 321 



from cement materials 218 



from incinerator ash "22 



from Nebraska lakes 322 



from wood and plant ashes 427 



industry in America, development 818 



loss in industrial wastes 630 



removal by com crop, Corm. Plate 232 



resources and use in New Zealand . 218, 629, 817 



resources of Australia 322 



resources of United States, U.S.D.A 522 



salts, analyses and tests 322 



salts, production in 1915-16 ." 523 



Potassium- 

 aluminum sulphate, fertilizing value 527 



chlorid, effect on composition of cereals. . 827 



cyanid, effect on permeability 326 



determination 110 



nitrate, effect on alcoholic fermentation 



by SUrigmatoctjstis nigra 223 



permanganate, action with plant peroxi- 

 dases 726 



permanganate, antiseptic and germicidal 



value 176 



permanganate as an antidote for poison- 

 ous plants 688 



requirement of barley and oats, R.I 34 



sulphate, effect on soil acid ity 23 



sulphate, fertilizing value 229, 527 



sulphate, fertilizing value. Guam 729 



sulphate, fertilizing value, 111 449 



sulphate, fertilizing value. La 529 



sulphid, effect on soil acidity 23 



Potato — 



aphid, pink and green, studies, Ohio 849 



aphis, notes 761 



Association of America 800 



bacterial diseases in Ontario 150 



bacterial diseases, notes, Fla 652 



beetle, Colorado, control by parasites 760 



beetle, Colorado, notes, Ohio 599 



brtad, recipes, U.S.D.A 364 



Page. 



Potato — Cent inued . 



brown streak and blossom abortion 549 



canker, treatment 249 



curly dwarf, studies 841 



diseases in Canada 553 



diseases in Dutch East Indies 249 



diseases in Germany 150 



diseases in Ireland 350 



diseases in Switzerland 47 



diseases, notes 551, 652 



diseases, notes, Colo 37 



diseases, notes. Me 538 



diseases, notes, AVash 150 



early blight, treatment 50 



fiea-beetle in Colombia 765 



late blight, notes, Ohio 895 



late blight, treatment 551,749 



leaf roll, studies 249 



malnutrition disease, notes 752 



material, oxidase activity 9 



mosaic disease, effect on yield 752, 842 



mosaic disease, studies 47 



powdery scab in Virginia 753 



Rhizoctonia disease, notes 753 



Rhizoctoniadisease, studies, U.S.D.A. 653,654 



rot , investigations 654 



scab, notes 551 



silage, preparat ion 800 



starch, farm manufacture 800 



tipburn and early blight, treatment, 



Iowa 753 



tubers, frost necrosis 842 



Verticillium disease, studies 49 



wart disease, notes 753 



Potatoes — 



breeding experiments 827 



bushel weights 889 



cost of production, W.Va 191 



culture experiments 135, 436, 825 



culture experiments, Idaho 30,37 



culture experiments, Minn 228 



( ulture experiments, N.Mex 32 



culture experiments, Ohio 338 



culture in Argentina 823 



culture in California, Cal 139 



culture in Colorado, Colo 37 



culture in Nevada, Nev 442 



culture in ncribem an western States, 



Me :3S 



culture in southwestern Russia 338 



culture in Washington, Wash 139 



culture in Wisconsin, NVis 442 



culture under glass 643 



culture under irrigation 630 



dietary value MX) 



drying 49),>00 



effect on soil bacteria, U.S.D.A 421 



feeding value 800 



fertilizer experiments 215, 436, 521, 533, 739 



fertilizer experiments, Mc 635 



fertilizer experiments, Minn 228 



fertihzer experiments, Ohio 337 



fertilizer experiments, Va. Truck 13S 



for late planting, Nev 436 



frozen and decayed, utilization 806 



immature, for seed 337 



