198 



ELEMENTARY AGRICULTURE 



Tobacco, a heavy feeder, 135. 

 13.6. 



cultivation, 137. 



effect of on soil, 69 



field, illustration, 57. 



kind of soil required, 137. 

 Tomato plant, illustration, 57. 

 Trees, preparation of for plant- 

 ing, 170, 171. 



selection of for planting, 170. 



where procured for planting, 



171. 172. 



Tubercles, 45, 50, 51. 

 illustration, 51. 



Water, experimental study of, 

 in plants, 2<x 



proportions of in farm crops, 

 21. 



proportions of in soil, 58. 



table showing proportions of 

 in farm crops, 21. 



underground, 63. 

 Weeds, classification, 87. 



nature of, 86 



work of, 86. 



Weight per bu. of farm prod- 

 uce, 15. 



What makes plants grow, 9. 

 Why plants store up food, n. 

 Wood lot, care of, 164. 



management of, 165, 166. 



profit in, I 66. 

 Worn-out soil, 26. 



