292 



INDEX 



Mineral manures — continued. 

 Eifect of, on Swedes, 120 

 Effect of, on wheat, 48. 



Nodules on roots of leguminous plants, 



11. 

 Nutrition of animals, 240. 



N 



Nitrate of soda, comparison with ammo- 

 nium-salts, 44, 59, 60, 76, 82, 85, 

 107, 131, 157, 161, 163. 

 Nitrates, distribution in soil and subsoil, 

 224. 

 Due to fallowing, 63, 222. 

 Formed by bacteria, 218. 

 In drainage waters, 229. 

 In mangels, 118. 

 Lost by drainage, 51, 63, 223. 

 Nitric acid in rain, 18. 

 Nitrification, 52, 196, 217, 236. 



Of ammonium-salts, 225. 

 Nitrifying organisms, distribution of, 221. 

 Nitrite-forming bacteria, 218. 

 Nitrogen, accumulated by clover, 147. 

 Added to the soil by rain, 20. 

 Effect of, on quality in barley, 89. 

 Experiments on fixation of, G, 8, 11, 



99. 

 Gain or loss to the soil, 38, 210. 

 Gained or lost during feeding, 254. 

 In barley grain, 84, 89. 

 In plant, sources of, 3. 

 In soil, accumulated by wild herbage, 



139. 

 Of manure recovered in crop, 54, 112. 

 Nitrogenous constituents of food, and 

 fat, 247. 

 In fattening animals, 250. 

 And increase, 242. 

 And work, 245. 

 Nitrogenous manures, comparative effect 

 on barley, 76. 

 Effect on grass, 161. 

 Effect on mangels, 97, 116. 

 Effect of successive increments on 



yield of wheat, 45. 

 Effect on wheat, 42. 

 Injurious effect on leguminous crops, 



198. 

 Injury caused by excess of, 102, 126, 

 162. 



o 



Oats, experiments on, 92. 

 Oxen, composition of, 250. 

 Organic matter in rain, 20. 



In Rothamsted soils, 28. 



In manures, value of, 165. 



In soils, effect of on bacteria, 220. 



Peas, 141. 



Percolation of rainfall through bare soil, 



22, 61. 

 Phosphoric acid, function of, 59, 80, 87, 

 120. 



Importance to barley, 80. 



Importance to Swedes, 120, 196. 



In Rothamsted soils, 29, 54. 



Removed from soil by crops, 38, 212. 



Removed in drainage waters, 238. 



Value of, in wet seasons, 59, 87. 

 Pigs, composition of, 252. 



Experiments upon, 242. 

 Plantago lanceolata, 160, 181. 

 Poa pratensis, 162, 175. 

 Potash, and carbohydrate formation, 

 56, 117, 125. 



Diminishes incidence of fungoid 

 disease, 103, 165. 



Effect of, on grass land, 160, 164, 170. 



Effect on leguminous plants, 159. 



Effect on turnips, 120. 



Function of, 56, 59, 87, 105, 117, 125, 

 129. 



In Rothamsted soils, 29, 54, 214. 



In soils^ set free by lime, 168. 



Lost in drainage waters, 238. 



Removed from the soil by crops, 38, 

 212. 



Value of, for beans, 134. 



Value of, in dry seasons, 59, 87. 



Value of, with mangels, 105, 111. 

 Potatoes, continuous growth of, 95, 123. 

 Poteriura sanguisorba, 155, 160, 179. 



