250 



INDEX 



Experiment to show, 

 checking loss of water by 



evaporation, 55. 

 chlorophyl necessary for 



starch making, 113. 

 effect of soil mulch, 55. 

 depth of planting seeds, 



8r. 

 effect of lime on clay soil, 



42. 

 effect of working soil 



when wet, 26, 45. 

 exclusion of oxygen by 



leaf, 113. 

 film water, 50. 

 growth in length of roots, 



1 6. 



heat necessary for germi- 

 nation, 73. 

 how food and water get 



into the root, 18, 19. 

 how soils are warmed, 58. 

 how soils lose heat, 59. 

 importance of roots, 7. 

 moisture necessary for 



germination, 71. 

 no starch formed in dark, 



112. 



osmose, 18, 19. 

 plants contain albumi- 

 noids, 64. 



plants contain ashes, 65. 

 plants contain cellulose, 



63- 



plants contain gum, 64. 

 plants contain oil, 64. 

 plants contain starch, 64. 

 plants contain sugar, 64. 

 plants contain water, 65. 

 power of soils to absorb 



rain, 40. 

 power of soils to hold 



water, 44, 45. 

 power of soils to pump 



water, 43. 



roots absorb moisture, 9. 

 roots take food from soil, 9. 



Experiment to show, 

 roots produce new plants, 



10. 



roots need air, 21. 

 soil characteristics, 24, 25. 

 soil temperature, 57, 60. 

 starch in leaf, in. 

 stems carry sap, 122. 

 stems store food, 124. 

 transpiration, the fact, 



109. 



transpiration, amount, in. 

 use of cotyledons, 79. 

 what becomes of water 



taken by roots, 39. 



Fallow, bare, 100. 

 Fall plowing, 99. 

 Families of plants, 86. 

 Farm drainage, 235. 

 Farm manures, 171, 183. 



classification of, 171. 



importance of, 172. 

 Farmer deals with agents, 



laws and forces, 5. 

 Fat in plants, 64. 

 Fermentation of manures, 



?74- 



Fertile soil, a, 141. 

 biological properties of, 



142, 143. 

 chemical properties of, 142, 



147. 

 most important properties 



of, 150. 



physical properties of, 142. 

 Fertility of the soil, 150. 

 economizing the, 150. 

 maintaining the, 150. 

 Fertilizers, commercial, 68, 



192. 



analysis of, 203. 

 classification of, 171. 

 home mixing, 211. 

 how to know what kind is 

 needed, 212. 



