INDEX 



Absorption, selective, 95 



Acclimatization, 115 



Acid soils, 35 ; effect of lime on, 36 ; 



plants of, 35 ; test for, 35 

 Air, 40 ; as a weathering agent, 13 ; 



composition of, 40 ; in soil, 41 ; 



moisture in, 116 ; value of, in soil, 



41 ; variations in pressure, 40 ; 



weight of, 40 

 Albumen, 86 

 Alkali soils, 34 

 Aluminum, characteristics of, 7 ; in 



plants, 100 

 Ammonification, 107 

 Amyloplasts, 77 

 Annuals, 87 ; value of, 205 

 Anthers, 79 

 Arid regions, 11 

 Artificial soils, 36 

 Atom, definition of, 2 ; size of, 2 



Bacteria, and nitrification, 107 ; de- 

 nitrifying, 110 ; in symbiosis, 108 ; 

 need of lime, 109 ; requirements 

 for growth, 107 



Bed rock, 12 ; modifications of, 20 ; 

 outcrops of, 12 



Biennials, 87 



Blanching, effects of, 123 



" Bleeding " of plants, 97 



Borders, arrangement of plants in, 

 202 ; character of, 201 



Bowlders, 31 



Bridge grafting, 193 



Bud scales, 69 ; use of, 69 



Bud variations, 260 



Budding, methods of, 190 ; uses of, 

 189 



Buds, accessory, 67, 69 ; adventitious, 

 69; dormant, 70; flower, 70; lat- 

 eral, 67; leaf, 70; mixed, 70; 

 naked, 69 ; protection of, 69 ; ter- 

 minal, 67 



Bulbs, value of, 207 



Bundles, fibrovascular, 65; arrange- 

 ment in dicotyledons, 66 ; arrange- 

 ment in monocotyledons, 66 



Bushes, 89 



Calcium, characteristics of, 6 ; test 

 for, in soils, 105 ; use of, by plants, 

 98 



Calcium carbide, 4 



Calyx, 79 



Cambium, in roots, 61 ; in stems, 66, 67 



Carbohydrates, 98 



Carbon, characteristics of, 9 ; occur- 

 rence of, 97 



Carbon dioxide, amount in air, 97 ; 

 formation of, 4 



Carbon disulphide, 4 



Carpels, 79 



Carpet bedding, 208 



Caruncle, 86 



Cavities in trees, 228 



Cell, 57 



Cell sap, 57 



Cell wall, 57 



Centigrade scale, 43 ; rule for chang- 

 ing, to Fahrenheit, 43 



Chemical compounds, 1, 4 



Chemical elements, change of state 

 in, 2 ; distribution of, 5, 101 ; found 

 in plants, 5 ; in plant food, 75 ; lack- 

 ing in soils, 104 ; most abundant, 5 ; 

 native, 1 ; number needed by plants, 

 95 ; table of the more common, 3 



Chemical formulas, 2 



Chemical symbols, 2 



Chlorine, characteristics of, 9 ; in 

 plants, 100 



Chlorophyll, 75 



Chloroplasts, 75 



Chromoplasts, 78 



Cion, effects of stock on, 195 



Clay, amount of pore space in, 41 ; 

 characteristics of, 31 ; run-off of 

 water in, 47 



291 



