14 DEPARTMENT OF AGRICULTURE BULLETINS 26-50. 



Potato growing — Continued. 



planting, cultivation, disease and insect control, etc., methods in United Statea 

 and Germany, 47, 6-8. 



United States, effect of corn and petroleum production, note, 47, 5-6. 

 Potato, importance in American and German agriculture, 47, 1-2. 

 Potato mash, use for feed, Germany, 47, 4 

 Potato tops, use for feed, Germany, 47, 4. 

 Potato-drying industry — 



ty establishment, output, etc., Germany, 47, 4. 

 F* Germauy, development, note, 47, 11. 

 Potatoes — 



breeding suitable varieties, need, 47, 6. 



by-products, value for feed, 47, 4. 



dried, uses, 47, 11. 



fertilizer, effect of manganese sulphate, experiments, 42, 23-24. 



growing on dairy farm, advantages, 32, 8. 



importation, danger, prohibition, probable results, etc., 47, 8-9. 



imports, 1901, 1908, 1911, 47, 8. 



industrial uses, practices in Germany, 47, 2. 



production in America, comparison with German production, 47, 1-2. 



surplus production, \itilization, suggestions, 47, 9-11. 

 Power Fife wheat, note, 33, 19. 



Powers, Thomas A., note on reindeer management in Alaska, suggestions, etc., 59, 25. 

 Pranke, E. J., statement on future of cyanamide industry, 37, 9. 

 Preston wheat, origin, tests at Dickinson, N. Dak., 33, 21, 23. 

 Prickly ash, medicinal uses, collection, prices, etc., 26, 8-9. 

 Prickly pear — 



adaptability to conditions, studies of different species, 31, 7-9. 



flowers, coloration, changes, etc., 31, 18-19. 



proliferation, habits of different species, 31, 19-20. 



spicules, excessive development, 31, 9. 



spine variation, studies, 31, 1-7. 



spineless, bud variation, -importance, 31, 4. 



spineless, propagation of cuttings from Malta, results, 31, 2-4. 

 Prickly pears — 



fungus disease, prevalence, effect, etc., 31, 15. 



growing from seed and cuttings, comparison, 31, 20-22. 



growth habits of different species, 31, 14-16. 



housing, effect, 31, 12-13. 



Laredo district, Texas, behavior in otber localities, 31, 7-8. 



moisture requirements, different species, 31, 22-23. 



Bpineless varieties, growing at Brownsville, Tex., 31, 11. 



variations with locality, 31, 10-12. 

 Prickly yellowwood. See Prickly ash. 

 Proliferation — 



prickly pear, relation to sterility, 31, 19-20. 



prickly pears, habits of different species, 31, 19-20. 

 Pruning fruit trees, day's work, 29, 9. 



Purdy, Carl, growing Dutch bulbs in California, experiments, 28, 2. 

 Purple raspberry, wild. See Raspberry. 



Rampart experiment station, Alaska, line of work, 50, 11. 

 Range improvement by deferred and rotation grazing, 34, 1-16. 

 Range plants — 



flower stalks, production, relation of plant vigor, 34, 4-5. 



growth requirements, 31, 2-8. 



removal of foliage at different times, effect, experiments, 34, 3-4. 



seed crops, relation of plant vigor to time and quantity of production, 34, 5-6 



seedling stands, factors, 34, 7-8. 

 Ranges — 



deterioration, causes, 34, 1-2. 



mountain, protection, yearlong, investigations, experiments and results, 34, 10-11 



revegetation, yearlong protection and deferred grazing, comparison, 34, 10-13. 

 Rangifcr — ■ 



arcticus, reindeer species, Alaska, note, 50, 22. 



caribou, reindeer species, Alaska, note, 50, 22. 

 Raspberry, medicinal uses, collection, prices, etc., 26, 8. 



