3^4 



INDEX 



Texture of soil affected by manures, 



loi, 163, 176, 216, 269, 273 

 Thaer, theory of plant nutrition, 5, 



7 

 Theories of, plant nutrition, 5-6, 13 ; 



fertiliser action, 276 

 Thomas and Gilchrist, 127 

 Thomas phosphate, 129 

 Tillering promoted by phosphoric 



acid, 139 

 Tobacco, manures for, 337 

 Top-dressings, 58, 307 

 Toxic substances excreted by plants, 



293 

 Transpiration, 18 

 Trefoil, manures for, 326 

 Tropical crops, manures for, 335 

 Toll, theory of plant nutrition, 5 

 Tunis phosphates, 118 

 Turnips, manures for, 313 



Unexhausted residues, compensa- 

 tion for, 354 

 Unit system of valuing manures, 



341, 348 . . 



Urea, decomposition of, 184; in 



guano, 230, 233 

 Urine, nature of, 179 

 Uromyces betm, 87, 174 



Valuation, of farmyard manure, 

 223 ; of manures, 73, lOO, 155, 



340 

 Van Helmont, theory of plant 



nutrition, 5 

 Vetches, as green manure, 272 ; 



manures for, 326 

 Ville, 89, 281 

 Virgin soils, 31, 35, 302 

 Vitriolised bones, 109 

 Voelcker, 195, 274, 358 



Wagner, comparison of nitrogen- 

 ous manures, 97 



Walter de Henley's Husbandries 3 



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 by 

 soil, 164 ; soluble silicates as 

 manures, 272 



Wet seasons, effect of farmyard 

 manure in, 220 ; with nitrogenous 

 manures, 67 ; with phosphatic 

 manures, 137 ; with potash 

 manures, 175 



Wheat, development of grain, 142 ; 

 effect of phosphatic manures on, 

 139; 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 



Wilfarth, nitrogen - fixing bacteria, 

 II 



Woburn, acidity of soil at, 62 ; ex- 

 periments at, 95, 274 ; experi- 

 ments on dung-making, 195 ; 

 fruit farm, 298 



Wolff and Lehmann, 243 



Wolter phosphate, 135 



Wood, dung-making experiments, 

 198 



Wood ashes, 11, 159, 163 



Wool, ir, 72 



Worlidge, 107 



Wrightson and Munro, 128 



Young, A., on woollen rags, 72 ; 

 on bones, 107 



Zeolites in soil, 51, 260, 267 



»>RINTED BY OLIVER AND BOYD, KDIKBUBGH. 



