INDEX 



Absorption, of carbon, 6-49 

 of light, by leaves, 31 

 of matter and energy, 6-98 

 of mineral elements, 66-98 

 of nitrogen, 50-56 

 from soil, 51-53 

 of soil nutrients, 88-91, 152-154 

 of water, 130-154 



Acceptors, of hydrogen, in respira- 

 tion, 272 



Acetic-acid fermentation, 267-268 



Acid fermentation, 265-269 



Acidity of salts, physiological, 54- 

 55 



Adsorbing capacity of soil, 76-77 



Adsorption, of enzymes, 211 



Aeration, of soil, 149 



Aerobic bacteria, 266 



After-ripening, of seeds, 294 



Air, in vessels, 191-193 



Albinism, 24 



Albumins, 223 



Alcoholic fermentation, 259-261 

 enzymes of, 261-265 



Aleurone grains, 220 



Alpine plants, 304 



Alternating movements, 314 



Amino acids, 220-221 



from proteins of seeds, 222 



Ammonia, oxidation in soil of, 256 

 in plants, 227-228 



Ammonium salts, 54-55 



Amylase, 206-209 



Amylophylous plants, 15 



Anaerobic bacteria, 258, 266-268 



Anaerobic respiration, 258-259 



Analysis, elementary, 7 

 organic, 6 



Annual plants, 342-345 



Antagonism, of ions, 75-76 



between vegetation and reproduc- 

 tion, 345 

 Anthocyans, 206 

 Anti-enzymes, 215 

 Arrhenius, on hydrogen ions in soil, 



96 

 Ash, composition of, 89 

 constituents, 66-68 



important groups of, 68-69 

 elements, quantitative absorption 

 of, 89 

 Askenasy, on rise of water, 188-189 

 Asparagine, 224-228, 229, 231 

 Assimilation, of carbon, products of, 

 13-17 

 correlation with transpiration, 177- 



178 

 dependence on light, 37-38 

 law of limiting factors in, 45-49 

 of light in photosynthesis, 33 

 number, 32 



relation to carbon dioxide, 43-45 

 to leaf structure, 34-37 

 to temperature, 45-49 

 to water supply, 37 

 of water, 13-17 

 Autodigestion (see Autolysis). 

 Autolysis, 224 



of cells, 214-215 

 Autotrophic plants, 53 

 Autotropism, 332 

 Autumnal migration, of substances, 



245 

 Auxographs, 280-281 

 Available and unavailable water, 

 144-145 



B 

 Bacteria, iron, 257 

 nitrogen fixing, 57-58 



371 



