592 



INDEX. 



Water, absorbed by plants, 73 ; 

 amount of, transpired by plant- 

 leaves, 56 ; an adulterant of guano, 

 319 ; a carrier of plant-food, 55 ; 

 in cow-dung, 226 cow-urine, 230 ; 

 from decomposition of farmyard 

 manure, 257 ; in horse-dung, 226 

 horse - urine, 230 ; necessary for 

 plant, 67 ; in pig-dung, 226 pig- 

 urine, 230 sheep - dung, 226 

 sheep - urine, 230 ; transpired by 

 elm-tree, 71 oak-tree, 71. 



Water-culture, 54. 



Water-logged soils, 179. 



Waterloo, bones from, 360. 



Way, Thomas, on retention of plant- 

 food by soil, 57, 59 ; on sewage, 437. 



West Indies, guano from, 298. 



Whales, guano from, 322. 



Wheat, fertilising ingredients removed 

 from soil by, 485 ; Flitcham experi- 

 ments on, 500 ; manurial constitu- 

 ents in, 282 ; manuring of, 499-501 ; 

 nitrogen removed in crop of, 145 ; 

 requires nitrogenous manures, 499 ; 

 Rothamsted experiments on, 500, 

 562-565 ; a source of nitrogen, 153. 



Wheat-soils, nitrates in, 157. 



Wheat-straw, analysis of stable man- 

 ure made from, 283 ; composition 

 of, 238 ; manurial constituents in, 

 282. 



White clover, growth of, promoted by 

 lime, 451. 



Wiegmann on ash constituents of 

 plants, 53. 



Wilfarth on nitrogen in plants, 44. 



Wilting, 73. 



Winogradsky, on nitrification, 52, 

 167, 169, 197 : on organisms in 

 soil, 94. 



Wolff on, analysis of manure - heap 

 draiiiings, 290 ; composition of 

 fresh and rotten dung, 288 ; assimi- 

 lation of organic nitrogen by plants, 

 47 ; relative manurial value of 

 manurial compounds, 556 ; urine, 

 232. 



Wood-ashes as potash manure, 218, 

 419. 



Woodhouse, researches of, on nitrogen 

 in plants, 41. 



Wool, capable of nitrification, 182 ; 

 potash in, 217. 



Wool-waste, 427 ; nitrogen in, 427. 



Wooluey, on organisms in soils, 93, 

 95 ; on water in soils, 75. 



Wrightson, Professor, on application 

 of basic slag, 414. 



Yeast, 94. 



Yorkshire, bones first used in, 359. 



Zeolites, potash in, 220. 



PRINTED BY WILLIAM BLACKWOOD AND SONS. 



