382 



INDEX 



Minimum, law of, 282 

 Mixed fertilisers, 352 

 Miinlz and Girard, 195 

 Murray, Sir James, 123 

 Mussels, 75 



Mustard, as green manure, 272 

 Mustard seed in rape cake, 240 

 Mulch, farmyard manure as a, 221 



Native guano, 246 



Night soil, 244 



Nilson, 134 



Nitrate of lime, 44 



Nitrate of soda, 12, 307 \ action on 

 soil, 51, 54 ; compared with 

 ammonium sulphate, 64, 94 ; 

 composition, 49 ; for cabbages, 

 316 ; in Egypt, 47 ; source of, 

 45 ; value of soda, 53, 170 



Nitrates, saving of soil, 273 ; soil, 

 289 



Nitric acid in rain, 29 



Nitrification, in spring, 90 ; in wet 

 seasons, 67 



Nitrogen, and fungoid diseases, 86 ; 

 compounds of, in dung, 206 ; 

 contained in rain, 29 ; conver- 

 sion into ammonln, tables for, 

 377 ; electrical fixation of, 42 ; 

 fixation by calcium carbide, 38 ; 

 fixed by Leguminosas, 1 1 ; growth 

 proportional to supply of, 28 ; in 

 food, fate of, 180 ; in wheat grain 

 and flour, 84 ; losses by denitri- 

 fication, 185, 305 ; lost in dung- 

 making, 192 ; origin of combined, 

 30; recovered in crop, 99, 210; 

 removed in four-course rotation, 

 303 ; source of plants', 9, 26 ; 

 value of unit, 342 ; vegetative 

 growth promoted by, 77 



Nitrolim, 38 



Nodule organisms, 273 



Nucleo-proteins, 140 



Nutrition, theories of, 5-6, 13 



Oats, manures for, 31 1 

 Oilcake, 12, 240, 242, 345 

 Oil in manures, 72, 237 

 Oospora scabies^ 321 

 Organic manures, value of, 94, lOO 

 Organic matter, value of, in soils, 

 73 



Palissy, B., observationson manures, 



4 



Pasture, manures for, 329 



Peat moss, as litter, 181, 195 ; 

 manure, 183 



Peruvian guano, 12, 115, 229, 248, 

 338, 346 ; dissolved, 235 



Phosphate rock, 115, 156 



Phosphatic guano, 115, 152 



Phosphate, conversion into phos- 

 phoric acid, tables for, 377 ; of 

 iron, 125; of lime, 104, 142; 

 value of unit, 343 



Phosphates, action of lime on soil, 

 260 ; required by barley, 309 ; 

 required by turnips, 313 



Phosphatic gypsum, 134 



Phosphoric acid, 103, 136 ; and 

 nitrogen in plant, 140 ; conver- 

 sion into phosphate of lime, tables 

 for, 377 ; value of unit, 343 



Phosphorus in iron, 127 



Photo-synthesis, 15, 169 



Pickering, 298 



Pigs, composition of excreta of, 181 



Plant food, dormant and available, 

 23 ; in soil and crop, 21 



Plasmolysis, 18, 50 



Plasmodiophora brassiccp, 259 



Pliny, 250 



Plots for field experiments, size of, 

 365 



Poly halite, 160 



Polzenius, stickstoff-kalk, 41 



Pot experiments, 375 



Potash salts, 13 



Potash, 158 ; value of unit, 344 



Potassium carbonate, 163 ; function 

 of, in nutrition of plant, 166 ; 

 salts, retention by soil, 164 



Potatoes, manures for, 319 



Precipitated phosphate, 134, 152 



Preservatives in dung-making, 200 



Priestley, discovery of assimilation, 

 6, 276 



Pugh, source of plant nitrogen, 9 



Quality in produce, 66, 72, 81, 



269, 270, 308, 320 

 Quicklime, 250 



Rabbit hair, 71 

 Rags, II, 72 



