416 



INDEX. 



TSC 



Tschemo-sem, or black earth of Russia, 

 nitrogen in, 311 



Turf saturated with food of plants, ex- 

 periments -with, 107 



Turnips, growth of, IS 



influenced by removal of 



leaves, 27 



UNMANURED land, experiments in 

 Saxony on, 190 

 produce of, dependent on pre- 

 ceding crop, 191 



yULKER, absorption of soils for am- 

 monia, 140 



— analysis of farm-yard manure, 145 



— estimation of ammonia in farm-yard 

 manure, 315 



WALNUT leaves, analysis of ash of, 

 355 

 Water, drainage, lysimeter, river and 



marsh, analysis of, 96, 363 

 — in soils, contains different quantities 



of nutritive matters, 98 

 Water, solvent action of, on soils in 



lysimeters, 365 

 Way, analysis of drainage water, 363 



Weeds, cause of their production, 234 

 Wheat crop, quantity of phosphoric acid 

 and potash removed from soil by, as 

 compared with rye crop, 119 



— effect of potash on, 339 



— field, retardation of the exhaustion 

 of, 175 



— growth of, 33, 41 



— produce of, from salts of ammonia, 

 according to Lawes and Gilbert, 322 



— produce of, with superphosphate of 

 lime, 147 



— soil, 115 



exhaustion of, 170 



Winter wheat, mode of growth of, 33 



effect of temperature on, 34 



Wood, ash. 287 



mixed with earth for application, 



288 



ZENKER, comparative experiments 

 with bone-earth and guano, 279 

 Zinc in the ash of Viola calaminaria, 



57 

 Zoeller, experiments on the vegetation 

 of plants in turf 106 



— mode of analysing soils, 119 



— analysis of guano by, 257 

 lysimeter waters by, 365 



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