132 INDEX 



PAGE 



Motion in soils 19 



Movement of soils 20 



Muntz, A., and Gaudechon, H., cited 30 



quoted 24 



Murray, Sir John, cited 75 



Newell, Frederick H., cited 75 



Night soil 108 



Nitrates in agriculture 108 



in soil solution 103 



Nitrogen carriers 103 



"Official method" of soil analysis 10 



Optimum moisture content 24 



Organic compounds, Effect on plants 82 



Organic constituents of soil solution 54, 79 



Orthoclase, Alteration of 33 



Ostwald, Wo., cited 28 



Oxidizing power of roots 101 



Oxygen in the soil 53 



Oxystearic acid, Toxic to plants : . . . . 96 



Patten, Harrison E., cited 24, 25, 60 



See Cameron, Frank K., and Patten, Harrison E. 



and Waggaman, William H., cited 9, 59 



and Gallagher, F. E., cited 59 



Pearce, Julia R. See Briggs, Lyman J., Martin, F. O., and Pearce, J. R. 

 Pember, F. R. See Hartwell, Burt L., Wheeler, H. J., and Pember, F. R. 



Penfield, Samuel L,., cited 13 



Percolation experiments 47 



Peter, Alfred, cited 54 



and Averitt, S. D., cited 10 



Pfeffer, Wilhelm F. P., cited 18, 72, 73, 101 



Phlogiston theory 17 



Phosphates 50 



Picoline carboxylic acid, toxic to plants 96 



Plant- food theory 16 



Plant growth and concentration 70 



Plant nutrients, Supply and removal 75 



Plot experiments 14 



"Poor" and "good" soils compared 80 



Pot experiments 14 



Puddling 25 



Pyrogallol 87 



Pyrophyllite 34 



Ragweed 97, 98 



Rainfall 22, 75 



