INDEX 



381 



Humus, formation in dunghill, 186 ; 



in soil, value of, 216, 273 

 Hydrogen evolved from dunghill, 



187 



ICHABOE guano, 235, 248 



Incompatibles, 353 



Ingenhousz, light essential to 

 assimilation, 6 



Inoculation of soil, 36 



Iron in soil, function of, 270 ; sul- 

 phate of, 270 



JODlN, 272 



Kainit, 160, 164, 201 



Kalk-stickstoff, 38 



Kellner, 191 



Kelp, 158, 163 



Kiln dust, 74 



Kirwan, 104 



Knop, water cultures, 10 



Kohl rabi, manures for, 316 



Kossowitsch, 292 



Lahn phosphates, 116 



Law of, diminishing returns, 283 ; 

 the minimum, 282 



Lawes, manufacture of superphos- 

 phate, 13. 120 ; on turnip culture, 

 138 ; origin of Rothamsted ex- 

 periments, 9 ; use of ammonium 

 salts, 12 



Lawns, manures for, 338 



Leather, 71 



Leaves, assimilation b}-, 6, 14, 168 ; 

 stimulated by nitrogen, 85 



Leguminous crops, manures for, 

 322 ; plants and nitroijen, 10, 32 ; 

 effect of potash on, 171 



Leuchstadt, experiments at, 192, 202 



Leucite, 163 



Liebig, on bones, 104, 107 ; on 

 superphosphate, I19 ; silicate 

 manures, 272 ; £Ource of plants' 

 nitrogen, 9, 1 1 ; theory of plant 

 nutrition, 7, 276 ; use of am- 

 monium salts, 12 



Lime, action of, on soil, 63, 249, 

 257 ; ashes, 251 ; ground, 253 ; 

 in basic slag, 128, 151 



Limestone, 250 



Limiting factors for growth, 284 



Liquid manure, 205 



Litter, composition of, 181 ; effect 



of, on losses of nitrogen, 195 

 Lobos phosphatic guano, 115 

 Lodging, due to excessive nitrogen, 



Lcihnis, decomposition of cyanamide, 



39 

 London dung, 206 

 Lucerne, manures for, 325 

 Lupins as green manure, 272 



Machines for sowing fertilisers, 372 

 Maercker and Schneidewind, 192 

 Magnesium salts in manures, 163, 



262, 269 

 Magnesian limestone, 251 

 Maize, manures for, 312 

 Malt dust, 12, 74 

 Manganese salts, action of, 271 

 Mangolds, with increasing nitrogen, 

 29 ; effect of sodium salts on, 52 ; 

 late growth with nitrate of soda, 

 66 ; effect of manuring on com- 

 position, 86 ; effect of manuring 

 upon number, 102 ; effect of 

 potassic manures, 168 ; value of 

 salt for, 268 ; manures for, 316 

 Manure, significance of term, i, 24 

 Manure value of foods, 225, 356 

 Manures, compounded, 301 

 Manures for barley, 308 ; beans, 

 322 ; cabbages, 316 ; clover, 324 ; 

 cotton, 336 ; fruit, 334 ; garden, 

 338 ; grass land, 326 ; hops, 333 ; 

 lucerne, 325 ; maize, 312 ; man- 

 golds, 316; oats, 311; pasture, 

 329; potatoes, 319; rye, 312; 

 sainfoin, 325 ; sugar, 336 ; 

 Swedes, 312 ; tea, 337 ; tobacco, 

 337 ; tropical crops, 335 ; vetches, 

 326 ; wheat, 306 

 Marl, 249 

 Marsh gas evolved from dunghill, 



187 

 Maturity, accelerated by phosphoric 

 acid, 136 ; deferred by excess of 

 nitrogen, 78 ; effect of potash on, 



174 

 Meat guano, 236, 238, 248, 345 

 Micrococcus iirccc, 184 

 Mineral manures, 24 ; duration of, 



in soil, 96 



