INDEX TO PAPERS ON PLANT SUBJECTS IN YEARBOOKS. 



33 



N[ Year- 

 Extract, book. 



Native pasture plants 223 1900 



New citrus and pineapple productions of the Department of 



Agriculture, paper 427 1906 



creations of the Department of Agriculture, paper. . . 343 1904 



fruit productions of the Department of Agriculture, paper. . 383 1905 



opportunities in subtropical fruit growing, paper 394 1905 



tobacco varieties, paper 431 1906 



Zealand. See Flax and Hemp. 



Nitrogen as a constituent of plant food 225 1901 



directly available content of soils 411 1906 



effect on growth of plants 225 1901 



fixation 336 1904 



by soil bacteria • 411 1906 



from atmosphere by electricity 411 1906 



gain by certain organisms 411 1906 



how gained 277 1902 



lost 277 1902 



problem and bacteria, paper 277 1902 



present status, paper 411 1906 



root-nodule bacteria 411 1906 



See also Bacilli, Bacteria, Inoculation, and Legumes. 



North America, geographic distribution of animals and plants 9 1894 



Notes, additional, on seed testing 98 1897 



Nut trees, diseases in 1904 r 367 1904 



1905 409 1905 



1906 437 1906 



1907 467 1907 



Nutrition of plants, assimilation of carbon 225 1901 



relation to health of plants, paper 225 1901 



Nuts, pecans, histories and descriptions 356 1904 



399 1905 



429 1906 



450 1907 



o 



Oak trees for home place 284 1902 



Oat plant, analysis 225 1901 



Oats and wheat on live-stock farm 278 1902 



Excelsior White Schonen, introduction into America, cost. 384 1905 



industrial progress and improvement of crop 264 1902 



seeds 238 1901 



Swedish Select, introduction into America, cost 384 1905 



Office of Fiber Investigations 108 1897 



Oil-producing seeds 33 1895 



Olive culture in the United States. 84 189G 



not adapted to Porto Rico and the Philippines 242 1901 



Oliver Red apple, history and description 429 1906 



Onions for truck farming 459 1907 



Opium, experiments in production 325 1903 



Opportunities in agriculture, paper 340 1904 



new, in subtropical fruit growing, paper 394 1905 



iCir. 171 



Page. 

 581-590 



329-346 

 221-240 

 275-290 

 439-454 



387-404 



167-168 

 125-126 

 168-171 

 123-125 

 130-132 

 136 

 131 

 335-336 

 333-335 

 333-342 

 125-136 

 130-135 



203-214 



441-452 



586 



610 



507 

 587-589 

 174-175 

 155-176 

 405-416 

 504-508 

 365-370 

 315-320 



511 

 157 

 356 

 294 

 225 

 236 

 294 



224-235 



185-204 



371-390 



360 



357-358 

 432-433 

 344-345 

 161-190 

 439-454 



