INDEX 



259 



Ventilation of soils neces- 

 sary for fixation of ni- 

 trogen, 144. 



Water, absorption of by soil, 



40, 43, 46, 142. 

 amount used by plants, 40. 

 capillary, 49, 153. 

 evaporation of, 54, 155. 

 free, 48, 153. 

 film, 50. 

 ground, 48. 

 importance of to plants, 



39- 



percolation of, 41. 

 relation of soils to, 39. 

 standing, 48. 

 work of in making soils, 



33, 35- 



Water and the farmer, 5. 

 Water in plants, 65. 

 Wateiing house plants, 51. 

 Watermelon soils, 28, 161. 

 Weeders, 167. 



Weeds, 54. 



how they injure crops, 54, 

 92. 



how to kill, 119. 



waste soil water, 54. 

 Wheat soils, 29, 30. 



water used by, 40. 

 Wheel hoes, 168. 

 White hellebore, 117. 

 Wind pollination, 132. 

 Work of roots, 9, 10, 15. 

 Work of sun in making 

 _ soils, 32, 34. 



air in making soils, 36. 



animals in making soils, 



37 : 



moving ice m making 



soils, 35. 

 moving water in making 



soils, 33, 35- 



plants in making soils, 36. 

 rain in making soils, 33. 

 Wood ashes, 199. 

 Wool waste as fertilizer, 

 195- 



