384 



INDEX 



Texture of soil affected by manures, 



loi, 163. 176, 216, 269, 273 

 Thaer, theory of plant nutrition, 5, 



7 

 Theories of, plant nutrition, $-6, 13 ; 



fertiliser action, 276 

 Thomas and Gilchrist, 127 

 Thomas phosphate, liQ 

 Tillering promoted by phosphoric 



arid, 139 

 Tobacco, manures for, 337 

 Top-dressings, 58, 307 

 Toxic subsUnces excreted by plants, 



293 

 Transpiration, 18 

 Trefoil, manures for, 326 

 Tropical crops, manures for, 335 

 Tull, theory of plant nutrition, 5 

 Tunis phosphates, 118 

 Turnips, manures for, 313 



Unexhausted residues, compensa- 

 tion for, 354 

 Unit system of valuing manures, 



34«. 348 

 Urea, decomposition of, 184; in 



guano, 230, 233 

 I'line, nature of, 179 

 Cromycfi bettr, 87, 1 74 



Valuation, of farmyard manure, 

 223; of manures, 73, loo, ijj, 



340 , , 



Van Ilelmont, theory of plant 



nutrition, 5 

 X'etohes, as green manure, 273 ; 



manures for, 326 

 Villc, 89, 28 1 

 X'irein soils, 31, 3> 302 

 Viiriolised bones, 109 

 Voelcker, 195, 274. 358 



Wagner, comparison of nitrogen- 

 ous manures, 97 



Walter de WcnXty's HMshan(irif,l 



Warrantry of fertilisers, 349 



Waste products as manures, 67 



Water, effect of dung on surface 

 tension of, 221 ; retained by 

 humus in soil, 219 



Water cultures, 10, 16, 55, 277 



Way, analysis of superphosphate, 

 124 ; retention of manures ly 

 soil, 164 ; soluble silicates as 

 manures, 272 



Wet seasons, effect of farmyaid 

 manure in, 220 ; with nitrogenous 

 manures, 67 ; with phosphatic 

 manures, 137; w''ii potash 

 manures, 175 



Wheat, development of grain, 142 ; 

 effect of pho'phatic manures on, 

 1 39 ; habit of growth, 89 ; manures 

 for, 306; nitrogen in grain and 

 flour, 84 ; yield with increasing 

 nitrogen, 80 



Whitney and Cameron, 285 



Wiborg phosphate, 134 



Wilfarih, nitrogen • fixing bacteria, 

 II 



Woburn, acidity of soil at, 62 ; ex- 

 periments at, 95, 274.; expeii- 

 ments on dung-making, 195 ; 

 fruit farm, 298 



Wolff and Lehmann, 243 



Welter phosi)h:ite, 135 



Wood, dung-making experiments, 

 198 



Wood ashes, II, 159, 163 



Wool, II, 73 



Worlidge, 107 



Wrightson and Munro, 128 



YoiiNG, A., on woollen rags, 72 ; 

 on bones, 107 



Zeolites in soil, $1, 260, 267 



rHIKTXD BT OLIVER AND BOYD, KDINBUROH. 



