INDEX 



Absorption of: 



salts by soils, 109 



water, 34 

 Abyssinian highland, source of soil, 



ii 



Acid, sulphuric, beneficial, 116 

 Action, mass, 106 

 Advantages of drainage, 167 

 Afghanistan, alkali in, 13 

 Africa, alkali in, 10 

 Alberta, alkali in, 7, 8 

 Aldajem, R., 28, 32 

 Alexandria, rainfall of , 1 1 

 Alfalfa, 197 

 Algeria, alkali in, 10 

 All, B., 103, 134, 139 

 Alkali: 



black, formation of, 108 



-heath, as alkali indicator, 63, 

 69 



-indicating plants, description 

 of, 74 



-loving plants, 63 



meadow-grass, 206 



meadow-grass, as alkali indi- 

 cator, 64 



movement, rate of, 148 



-resistant crops in reclamation, 

 162 



salts, antagonism between, 113 



waters, composition of, 231, 232 



water for irrigation, 224 

 Almond, 220 

 America, alkali in, 6 



American cowslip, as alkali indicator, 



64 



Ames, J. W., 14 



Ammonification, effect of salts, 138 



Analysis: 



by biological method, 103 

 by freezing-point method, 102 

 of Egyptian soil, 12 

 of soil in judging land, 243 



Analytical methods, comparison of, 



85 



Analytical process, 90 



Antagonism, 105 



between alkali salts, 113, 138 

 noted in soil bacteria work, 116 



Ancient seas as source of salts, 22 



Appearance in judging land, 242 



Apple, 220 



Apricot, 220 



Arabia, alkali in, 13 



Area affected with alkali, 4 



Argentina, alkali in, 10 



Aridity necessary for alkali, 6 



Arizona, alkali in, 8 



Arizona method of alkali analysis, 

 84,85 



Arrow: 



grass, as alkali indicator, 64 

 weed, as alkali indicator, 63, 73 



Asia, alkali in, 13 



Asparagus, 217 



Aster, as alkali indicator, 64 



Atrcplex, as alkali indicator, 63, 70 



Atti, R., 14 



Australia, alkali in, 14 



Australian salt-bush, 207 



247 



