INDEX. 



387 



SubBoil, mineral matter of, supplied to 

 surface soil by fodder plants, 219 



not reached by mineral matters of 

 manures, 156 



Superphosphates, 262 



experiments with, 148 



T 



Tillage, beneficial action of, 118 



Tobacco plant, mode of growth of, 43 



quantity of albumen and nicotine 



in, modified by treatment in growth, 

 46 



Tscherno-sem, or black earth of Russia, 

 nitrogen in, 294 



Turf saturated with food of plants, ex- 

 periments with, 112 



Turnips, growth of, 34 



influenced by removal of leaves, 



42 



Unmanured land, experiments in Saxony 

 on, 186 



produce of, dependent on preced- 

 ing crop, 187 



Vfllker, absorption of soils for ammonia, 

 142 



analysis of farm yard manure. 147 



estimation of ammonia in farm-yard 

 manure, 298 



W 



Walnut leaves, analysis of ash of, 334 

 Water, drainage, Jysimeter, liver and 

 marsh, analysis of, 103, 341 



in soils, contains different quantities 

 of nutritive matters, 105 



Water, solvent action of, on soils in 



Jysimeters, 342 - 



Way, analysis of drainage water, 341 

 Weeds, cause of their production, 225 

 Wheat crop, quantity of phosphoric acid 

 and potash removed from soil by, as 

 compared with rye crop, 123 



effect of potash on, 320 



field, retardation of the exhaustion of, 

 173 



growth of, 47, 55 



produce of, from salts of ammonia, 

 according to Lawes and Gilbert, 304 



produce of, with superphosphate of 

 lime, 148 



soil, 120 



exhaustion of, 169 



Winter wheat, mode of growth of, 47 



effect of temperature on, 48 



Wood, ash, 272 



mixed with earth for application, 



273 



Z 



Zenker, comparative experiments with 



bone-earth and guano, 264 

 Zinc in the ash of Viola calaminaria, 69 

 Zoeller, experiments on the vegetation of 



plants in turf, 112 



mode of analysing soils, 124 



analysis of guano by, 246 

 lysimeter waters by, 342. 



