INDEX 



ABSORPTION of salts by soils, 

 103 



Acid extract, total, 121 



Acidity, estimation of, 115 



Adaptability of micro-organisms, 

 149 



Adaptation of manures, 182 



Addition of plant foods, 174 



Adulteration. See Various man- 

 ures. 



Aerobic bacteria, 140 



Air, atmospheric, 10 



Air of soils, 134 



Air dry soils, 96 



Aitkeii on nitragin, 148 



Albite, 22 



Albuminoids, 317 



Algse, 10, 14, 137 



Algerian phosphate, 210 



Alinite, 151 



Alkaline soils, 114 



Alluvial soils, 49 



Alluvium, 28 



Alumina in soils, 121 



Alumiiiates, 106 



Aluminium alkali-carbonate, 106 

 hydrate, 59, 106, 



132 

 phosphate, 133, 220 



Alta Vela phosphate, 212 



Altitude, influence of, 76 



Amandus Kahl's sieves, 234 



American Bureau of Soils, 



190 



American ashes, 278 

 Amides, 154 

 Amino- acids, 154 

 Ammonia, absorption of by soil, 



13, 161 

 fixers, 322 

 ,, in air, 12 



,, in rain water, 16 



,, in farmyard manure, 



317 



,, oxidation of, 156 



,, production of from 



proteids, 154 

 ,, retention of by soils, 



105, 257 



Ammonium carbamate, 316 

 ,, carbonate, 316 



chloride, 258 

 ,, citrate, 220 



,, nitrate, 258 



,, sulphate, 253 



Anaerobic bacteria, 140 

 Analysis of plants, 4 



,, soils, chemical, 96, 



122, 191 



,, ,, mechanical, 88 



Angamos guano, 296 

 Animal excreta, 306 



,, manures, 293 

 Anorthite, 22, 128 



