INDEX 



Achillea millefolium, 159, 160, 181. 

 Acid reaction in soils, 44, 157, 168, 219. 

 Agdell field, 65, 75, 88, 190. 

 Agrostis vulgaris, 157, 162, 173. 

 Aira caespitosa, 138, 141. 

 Albuminoids in food, 242, 245, 247, 263. 

 Alopecurus agrestis, 33, 41. 

 Alopecurus pratensis, 157, 162, 173. 

 Amides in mangolds, 118. 

 Ammonia in rain, 3, 18. 

 Ammonium-salts, compared with nitrate, 

 44, 59, 60, 76, 82, 87, 107, 131, 157, 

 161, 163. 

 Comparative ripening effect of, 108, 



117. 

 Leave no residue for following year, 



52, 226. 



Produce acid reaction in soil, 157. 

 Rapid nitrification of, 225. 

 In drainage water, 233. 

 Remove calcium carbonate from the 



soil, 157, 233. 



Retained near the surface, 76, 107. 

 Animals, nutrition of, 240. 

 Anthoxanthum odoratum, 162, 173. 

 Anthriscus sylvestris, 163, 179. 

 Arrhenatherum avenaceum, 162, 173. 

 Artificial manures : secondary action on 



soil, 286. 

 Autumnal rainfall and soil nitrates, 223. 



And wheat crop, 61. 

 Avena flavescens and pubescens, 157, 



173, 175. 

 Azotobacter chroococcum, 140. 



B 



Bacillus radicicola in nodules of legu- 

 minous plants, 11. 



827 



Bacteria causing loss of nitrogen, 114, 

 219, 256. 



Nitrification, 218. 



Nitrogen fixation, 11, 140, 210. 

 Barley, composition of, 84, 89. 



Conversion into malt, 261. 



Experiments on, 70. 



Grown continuously, 72. 



Grown in rotation, 75, 88, 194. 



Importance of phosphoric acid to, 

 80, 85. 



Valuation of crop, 83, 88. 

 Barn field, 94. 



Beans, effect of, on succeeding crops in 

 rotation, 201. 



Experiments on, 134. 

 Black bent grass, 33, 41. 

 Black medick, weed common on un- 



manured wheat plot, 38, 41. 

 Bokhara clover, 141. 

 Botanical analyses of grass plots, 172. 



Of wild vegetation, 138. 

 Boussingault feeding experiments, 241. 



Nitrification, 217. 



Plant nutrition, 3. 



Sources of nitrogen of vegetation, 6, 8. 

 Bran in flour, food value of, 269. 

 Briza media, 154, 160, 175. 

 Broadbalk field, 31, 231. 



Analysis of soils, 27. 

 Bromus mollis, 163, 177. 

 Brown, H. T., cytase formed during 



malting, 265. 

 Bushel, weight of barley, 84, 89. 



Weight of oats, 93. 



Weight o'f wheat, 55. 



Calcium carbonate : in Rothamsted 

 soils, 27, 140. 



