INDEX 



295 



Seed tester, 138 



Seeds, advantages of, 85 ; conditions 

 needed for germination, 136; depth 

 to plant, 134 ; drying, 144 ; plant- 

 ing table for, 145 ; receptacle for, 

 137 ; saving, 144 ; structure, 86 ; 

 vitality of, 137 



Selection, artificial, 266 ; natural, 

 273 



Selective absorption, 95 



Self-pollination, 82 



Self-pruning, 122 



Sepals, 79 



Shade plants, 122 ; artificially pro- 

 tected, 123 



Shearing plants, 141 



Shrubs, 66 ; for winter effects, 204 ; 

 location of, on lawns, 202 ; naming, 

 204 



Sieve tubes, 66 



Silicon, characteristics of, 10 ; in 

 plants, 100 



Silt, 31 



Sodium, characteristics of, 6 ; in 

 plants, 100 



Soil, absorption of water by, 46 ; 

 seolian, 28 ; alluvial, 29 ; amount 

 of chemical elements in, 38 ; bac- 

 teria in, 11, 107; capillarity in, 

 47 ; colluvial, 28.; constituents, 

 29; definition of, 11; depth of, 

 11 ; drift, 13 ; effects of ants on, 

 154 ; effects of earthworms on, 

 154 ; effects of lime on, 39 ; effects 

 of puddling, 151 ; flocculated, 38 ; 

 glacial, 29 ; harmful organisms in, 

 110 ; inorganic, 31 ; lacustrine, 27 ; 

 methodsof pulverizing, 150; names 

 of, 25 ; organic, 31 ; origin of, 12, 

 25; puddled, 39; puddled, and 

 plants, 39 ; residual, 12 ; sedentary, 

 26 ; structure of, 38 ; temperature 

 of, 42 ; toxic substances in, 101 ; 

 treatment for harmful organisms 

 in, 111 ; ventilation of, 41 ; vol- 

 canic, 28 ; water in, 47 ; weather- 

 ing of, 11 



Soil crumbs, 38 



Soil inoculation, 109 



Soil maps, 34 



Solanaceous fruits, 281 



Species, 90 ; elementary, 91, 270 



Spermatophytes, 56 



Spores, 57 ; number of, 231 



Sports, 255 



Spray pumps, 255 



Sprays : ammoniacal copper carbon- 

 ate, 242 ; Bordeaux mixture, 240 ; 

 copper sulphate, 168 ; iron sul- 

 phate, 168 ; kerosene emulsion, 

 254 ; lime-sulphur wash, 241 ; 

 potassium sulphide, 243 ; tobacco 

 water, 254 ; whale-oil soap, 254 



Starch grains, 75 



Stems, forms of, 64 ; how increased 

 in diameter, 67 ; internodes, 71 ; 

 nodes of, 71 ; structure of, 65 ; 

 use of, 64 



Stigma, 79 



Stipules, forms of, 71 



Stock, effects on cion, 195 



Stomata, 73, 74 ; number in leaves, 

 75 ; use of, 74 



Struggle for existence, results of, 

 273 



Subsoil, how distinguished, 12 



Subsoiling, 150 



Sugar, grape, 75 ; turned to starch, 76 



Sulphur, characteristics of, 9 ; in 

 plants, 99 



Summer annuals, 87 



Sun, amount of heat from, 41 ; dis- 

 tribution of rays, 42 



Sunlight, distribution of, 41 



Survival of the fittest, 273 



Symbiosis, 108 



Taproots, 65 



Temperature, 41 ; adjustment of 



plants to, 113 ; distribution of, 41 ; 



effects of color on, 43 ; maximum, 



115; minimum, 115; of growth 



processes, 114; optimum, 115; 



variations in, 42 

 Tender plants, 115 

 Testa, 86 

 Thermal belt, 47 

 Thinning, 142, 221 

 Tillage, effects of, 1 149 ; purpose of, 



149 



Topiary work, 228 

 Toxic substances in soils, 101 

 Transpiration, how plants avoid, 77 ; 



use of, 77 

 Transplanting, advantages of, 140 ; 



implements for, 140 ; seedlings, 



139 ; trees and shrubs, 209 ; when 



performed, 140 

 Trees, 89 

 Trenching, 150 



