26 



DEPARTMENT OF AGRICULTURE BULS. 201-225. 



Bulletin. 



Opuntia lindheimeri, growing at San Antonio, Texas, planting, 

 yield, etc 



Opuntia spp., description, planting, and yield in southern 

 Texas 



Oregon, wools, quality and grades 



Oyster grass. See Musk grass 



Packing, wool, suggestions to woolgrowers 



Palm, date, botanical characters of the leaves used in distin- 

 • guishing cultivated varieties, bulletin by Silas C. Mason. . . 

 Palm date. See also Date palm. 



Panic grass, habitat, value and analysis 



Panicularia spp., habitat, value, and analysis 



Panicum spp., habitat, value, and analysis 



Pappophorum apertum, habitat, value, and analysis 



Paspalum spp., habitat, value, and analysis 



Pasture grasses, native, of the United States, bulletin by David 



Griffiths, George L. Bidwell and Charles E. Goodrich 



Paving blocks, types, value, and uses 



Pear, prickly. See Prickly pear. 



Pennington, M. E., and others, bulletin on "A study of the 

 preparation of frozen and dried eggs in the producing sec- 

 tion " '. 



Pennsylvania, wool, quality and grades 



Peridermium cerebrum — ■ 



disease of jack pine, description, damage, spread, develop- 

 ment 



extent of damage and control measures 



Peridermium comptoniae, injury to jack pine 



Peridermium spp. , alternate hosts 



Perishable products. See Fruits; Market products; Meats; 

 Vegetables. 



Peter grass, description, propagation, value as duck food 



Phalaris arundinaeea, habitat, growth, habits, value, etc 



Pkilotria, description, propagation, value as duck food 



Phleum alpinum, description, habitat, value 



Phragmites communis, habitat, value, and analysis 



Phylloxera — ■ 



damage to vinifera vineyards, control, and suggestions. . . 



resistance of grapevines, factprs 



Pine^ 



jack. See Jack pine, 

 western white — ■ 



crown classification and seed production 



distribution of seed crop by crown classes 



seed production, bulletin by Raphael Zon 



seed-bearing characteristics 



white, value in gypsy-moth regions 



Pinus divaricata. See Jack pine. 



Planer tree, description, propagation, value as duck food 



Planera aquatica, description, propagation, value as duck food. 



Pleuraphis mutica, habitat, description, and value 



Plowing — 



cost per acre — 



barley in Great Plains 



corn growing in Great Plains 



oats growing in Great Plains 



oats growing in Great Plains, methods 



wheat laud, cost per acre 



Poa spp. , habitat, and analysis 



Poison, bait for corn leaf-beetle, preparation, use and value. . 



Polypogon monspeliensis, habitat, value, and analysis 



Polyporus schweinitzii, injury to jack pine. 



208 



208 

 206 

 205 



206 



223 



201 

 201 

 201 

 201 

 201 



201 

 220 



224' 

 206 



212 

 212 

 212 

 212 



205 

 201 

 205 

 201 

 201 



209 

 209 



210 

 210 

 210 

 210 

 204 



205 



205 

 201 



222 

 219 

 218 

 218 

 214 

 201 

 221 

 201 

 212 



