292 



AGRONOMY 



Cleavage planes, 78 



Cold, artificial protection from, lilt ; 

 effect of, on plants, 117 ; protection 

 from, 118 



Cold frames, 120 ; use of, 101 



Contraction wrinkles, 61 



Cool-season plants, 134 



Corolla, 79 



Cotyledons, 86 



Crops, grain, 282; leaf, 279; root, 

 279 



Cross pollination, 82 



Crossing, 262 



Cultivated plants, origin of, 277 



Cuttings, green or softwood, 185 ; 

 growing in shade, 189 ; hardwood, 

 185; heel, 188; leaf, 186; mallet, 

 189 ; method of making, 185 ; prop- 

 agation by, 185; root, 187; single 

 eye, 188; stem, 186; tuber, 186; 

 use of, 184 



Darwinian theory, 275 



Decorative planting, purpose of, 197 



Delta soils, 20 



Dew, 116 



Dew point, 116 



Dibber, 141 



Dicotyledon flower, plan of, 83 



Digestion in plants, 76 



Double cropping, 138 ; crops for, 139 



Ducts, in stems, 66 ; in roots, 60 



Earth, composition of, 1 

 Elementary species, 91, 276 

 Embryo, 86 

 Endosperm, 86 

 Enzymes, 76 

 Epidermal hairs, 118 

 Essential organs, 80 

 Evolution, nature of, 272 



Fahrenheit scale, 43; rule for chang- 

 ing, to centigrade, 44 



Fairy rings, 102 



Families, plant, 91 



Fertilization, 79 ; double, 268 



Fertilizers, effect on soil, 103 ; how 

 to apply, 105 



Flower, epigynous, 79 ; hypogynous, 

 79 ; parts of, 79 



Flowers, characteristics of insect- 

 pollinated, 82 ; characteristics of 

 wind-pollinated, 82 ; insect-polli- 

 nated, 81 ; wind-pollinated, 80 



Forcing plants, in the window gar- 

 den, 162-; methods of, 157, K^ 

 Forcing single hills, 161 

 Formal style of planting, 208 

 Frost, conditions favoring, 116 ; dif- 

 ference from dew, 116; effect of 

 locality on formation of, 116 ; pro- 

 tecting from, 116 



Frostbitten plants, treatment of, 120 

 Fruit, a result of pollination, 83 ; 

 parts of the flower represented in, 

 83, 85 ; seedless, 83 

 Fruit spurs, 220 

 Fruiting, how induced, 141 

 Fruits, bush, 282 ; gourd, 281 ; modi- 

 fied for wind distribution, 84, 85 ; 

 new, 283 ; purpose of, 85 ; solana- 

 ceous, 281 ; tree, 282 



Garden styles, 209 



Garden, arrangement of crops in, 

 130 ; location of, 129 ; plan of, 

 130, 135, 139; planting, 132; pre- 

 paring the soil in, 130 ; time of 

 planting, 134 ; tools, 151, 154 



Genera, 90 



Geophilous habit, 118 



Germination, 136 



Girdling, 227 



Glaciers, work of, 20 



Gourd fruits, 281 



Graft hybrids, 195 



Grafting, bridge, 193 ; cleft, 192 ; 

 crown, 193 ; formsof , 192 ; root. 1 94 ; 

 saddle, 193 ; splice, 193 ; tongue, 

 193; value of, 192; veneer, 193; 

 whip, 192 



Grafting wax, 195 



Grain crops, 282 



Gravel, 31 



Guard cells, 74 



Guttation, 97 



Half-hardy plants, 114 



Hardwood cuttings, 187 ; heel, 188 ; 



mallet, 188 ; single eye, 188 

 Hardy plants, 114 ; sowing seeds of, 



136 



Heading in, 224 ; methods of, 226 

 Heat, amount received from sun, 41 ; 



effect on plants, 120 ; protection 



from, 121 



Hedges, plants for, 207 

 Heeling in, 211 

 Hilum, 86 



