34 INDEX TO PAPERS ON PLANT SUBJECTS IN YEARBOOKS. 



Extract. 



Orange and other citrus fruits, methods of propagating 85 



growing in Porto Rico 242 



in health and disease, fertilization of soil as affecting 8 



King, history and description 450 



new loose-skinned Thornton, history and description 427 



tangerine 343 



Washington Navel, introduction into America, cost 384 



Orchard, cost of establishing 340 



diseases, fighting 340 



grass, seeds 238 



trees, top-working, paper 266 



young, care 266 



Orcharding, commercial apple, paper 230 



Orchards, avocado, extent 394 



cover crops and green-manure crops 340 



fertilizing 340 



lemon, culture 453 



opportuni ties in establishing 340 



peach, contour system of planting 293 



cultivation 293 



and fertilization, paper 293 



of young trees 293 



distances for planting 293 



fertilization 293 



in bearing, cultivation 293 



methods of planting in different sections 293 



planting on old peach land 293 



rectangular system of planting 293 



preparation of land 293 



pruning and thinning 340 



thorough cultivation necessary 340 



preparation of land necessary 340 



trees desirable 340 



Organic matter, decay 411 



Origin, value, and reclamation oi alkali lands 35 



Origination of new varieties of crop plants 446 



plant varieties, influence of environment 83 



Orlando pineapple, history and description 427 



Ornamental plants, diseases in 1907 467 



trees, diseases, paper 463 



Orto.x, William Allen: 



Paper entitled ' ' Plant diseases in 1904 " 367 



' ' Plant diseases in 1905 " 409 



"Plant diseases in 1906" 437 



Orton, William Allen, 'and Adeline Ames, paper entitled 



"Plant diseases in 1907 : ' 467 



Our native pasture plants 223 



Outlook, agricultural, of the coast of Alaska 100 



Overfeeding plants, results 225 



Oxygen, injuries to plants from lack 225 



P 



Pabst pecan, history and description 356 



Palm, date, and Us culture 218 



[Cir. 17 J 



Year- 





book. 



Page. 



1896 



471-488 



1901 



360 



1S94 



193-202 



1907 



311-313 



1906 



336-337 



1904 



238-240 



1905 



294 



1904 



179-181 



1904 



175-176 



1901 



245 



1902 



245-258 



1902 



254-255 



1901 



593-608 



1905 



444 



1904 



174-175 



1904 



175 



1907 



351-352 



1904 



177-179 



1902 



610-611 



1902 



612-621 



1902 



607-626 



1902 



613-615 



1902 



609 



1902 



621-623 



1902 



619-621 



1902 



611-612 



1902 



608-609 



1902 



609-610 



1902 



607-608 



1904 



176 



1904 



174 



1904 



173-174 



1904 



172 



1906 



126-130 



1895 



103-122 



1907 



229-230 



1896 



89-106 



1906 



344-345 



1907 



589 



1907 



482^94 



1904 



581-586 



190o 



602-611 



1906 



499-508 



1907 



577-589 



1900 



581-598 



1897 



553-576 



1901 



171-172 



1901 



159-160 



1904 



410 



1900 



453-490 



