DEPARTMENT OF AGRICULTURE BULS. 976-1000, 



Pine — 



oil. See Oil, pine. 



sugar and alcohol, yield 



Pittsburgh, market statistics- 



Bulletin No. Page. 

 / 70,73,75, 



983-^ ' 



for fruits and vegetables, 1919 and 1920 982 < 



for live stock, 1910-1920 9S2 



Plow lands, value by States 1000 



Plowing — 



fall and spring, comparison of results in North Dakota 



work done by tractors and by horses on Corn Belt farms_ 



Plov.'s. beet, types 



" Plug track," term in sales of hay 



" Plugging," hay in loading cars 



Poland, agricultural statistics, 1919 



Pork, market statistics, imports, exports, and prices, 1910- 



1920 ft 982^ 



I 76,81,82 



224, 225, 

 245. 251- 

 256, 258, 

 260, 262- 

 264 

 19, 54, 86 

 53-54 



991 

 997 [ 



995 



979 

 979 



987 



Porto Rico, agricultural statistics, 1909-1920 987 



Portugal, agricultural statistics, 1904-1920 987 



Potatoes — 



farm prices — 



by months, 1909-1921 



value per acre, and purchasing power, December, 



1867-1920 999 



foreign countries, statistics 987 



growing — 



in sugar-beet area 995 



labor and materials, requirements in various States- 1000 



with borax fertilizer, yield in Maine experiments 998 



growth and yield, effect of borax in fertilizers, bulletin 



by B. E. Brown 998 



market statistics, 1919 and 1920 982] 



'•{ 



1S67-1920. 



999' 



6-7, 23 



15-19, 26- 



27, 34-37 



37 



34-36, 37 



9,22 



46 



58-61, 



126-130 



66-67 



47 



38, 41, 44, 

 70 



70 

 3-63 



34 



15-19 



5-6 



1-18 



223, 237- 



239, 243- 



250. 260, 



264, 265 



58, 61, 



64,70 



1-14 

 154 



purchasing power, 



Potts, C. G., and F. R. Marshall, bulletin on " Flushing and 



other means of increasing lamb yields " 996 



Poultry, market statistics, stoeks in storage 982 



Power — • 



cost and utilization on farms where tractors are owned, 



bulletin by H. R. Tolley and L. A. Reynoldson 997 



farm operations, comparison of horse power with tractor- 997 



Price level, changes, effect on industries 999 4, 7-10, 22 



Prices — 

 farm — 



different products, by months, 1909-1921 999 



products in United States, bulletin by G. F. Warren_ 999 



1-61 

 54-56 



products, use of cost of production data 994 



999 



relation to wages 



farmers, 1909-1921, and comparisons 999^ 



fixing, use of cost production 994 



rise and fall, effect of war periods 999 j 



wholesale, 1791-1920, 1900-1921, 1861-1878, and 1914- 



1921, tables 999 1 2 ^' V^}^ 



f 41-4' 7 



Pulp, sugar-beet, value for cattle feed, and use methods 995 < 49-50' 



36-65 

 1-72 

 6-7 

 10-12 

 14-18, 

 36-55 

 6-7 

 1-4, 12-16, 

 28-35 



