Index and Glossary 



481 



Muntz, 115, 116, 169, 195. 

 Mycoderma aceti, 465; pastorianum, 

 465. 



Natto (a vegetable cheese made in 

 Japan out of soy beans), bacteria 

 in, 456, 457. 



Natural starters (impure cultures of 

 lactic-acid bacteria secured by al- 

 lowing milk to turn sour spontan- 

 eously), 407, 



Needham, 2. 



Nitragin, cause of failure of, 228; 

 failure of, 228; further studies with, 

 228; gratifying returns from, 229; 

 improvement of, 228; new, 235; 

 preparation of, 227; recent ex- 

 perience with, 229. 



Nitrate (or nitrite, a salt resulting 

 from the union of nitric acid with 

 a base. Nitric acid has three equiva- 

 lents of oxygen, HNOa- Nitrous 

 acid has only two equivalents of 

 nitrogen, HNOo, and the union of 

 this with a base produces a nitrite. 

 Nitrate of soda is NaNO :}> Na 

 standing for sodium, N for nitro- 

 gen, O for oxygen. Nitrite of soda 

 is NaNOo.), accumulation of, in 

 manures, 340; formation of, 176, 

 178, in compost heaps, 339, 

 in electrical discharges, 195; in 

 gunpowder-making, 168; leaching 

 of, from soil, 158, 194; loss of, in 

 soils, 174; of ammonia, 193; of 

 potash, 175; of soda, consumption 

 of, in 1903, 175; production of, 

 by iron, ozone, and sulfate of lime, 

 195, by organic matter, 184; 

 relation of, to plant growth, 175; 

 removal of, in drainage, 177; utili- 

 zation of, by plants, 194. 



Nitric ferments, 171. 



Nitrifying bacteria, 170, J.81; culture 

 media for, 171; development of, 

 in deeper soil layers, 177; in sand 

 niters, 83. 



Nitrification (the gradual change of 

 nitrogenous vegetable or animal 

 substances into nitrate), 160; bac- 

 teriological nature of, 195; charac- 

 ter of, 169; conditions, affected by, 

 173; definition of, 168; depressing 

 effect on, of manures, 186; effect of 

 crop on, 182; importance of, 172; 

 in different soils, 173; in manure, 

 337, 338, 340; lime required for, 179; 

 study of, at Rothamsted, 176. 



Nitrites, 171. 



Nitrobacter, 171. 



Nitrogen, accumulation of, in the 

 soil, 261; addition of, to soil, by 

 azotobacter, 204; amount of, in 

 atmosphere, 155, -- in crimson 

 clover, 251; and bare fallows, 272; 

 available and unavailable, 335, 336; 

 conditions affecting availability of, 

 160; content of, in productive soil, 

 191; elementary, losses of from 

 manure, 330-332; fixation, 199, 

 205, 209, 211; fixing bacteria (or- 

 ganisms capable of causing the 

 nitrogen gas of the air to combine 

 with other elements. This property 

 enables them to enrich the soil in 

 nitrogenous substances), 196, 199, 

 200, 202, in filter beds, 122; 

 gas, utilization of, by plants, 19.3; 

 hunger, 217; increase of, in manure, 

 334; insoluble, 334; in soil-humus, 

 156; in subsoil, 156; loss of, in con- 

 tinuous growing of wheat, 179; 

 loss of, in soil, 157; losses of, in 

 filter beds, 122; proportion of, in 

 soil, 155; soil, 190, bacteriologi- 

 cal efficiency in transformation of, 

 161; soil, increase of, 190; source of, 

 for bacteria, 35; source of, in soil, 

 155; theory of source of, to plants, 

 208; transformation of, by bacteria, 

 155; transforming bacteria, 196, 

 197; utilization of, by bacteria, 190. 



Nitrogenous materials, availability of, 

 181. 



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