Index and Glossary 



481 



Muntz, 115, 116, 169, 195. 



Mycoderma aceli, 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 

 abase. Nitric acid has three equiva- 

 lents of oxygen, HNOa- Nitrous 

 acid has only two equivalents of 

 nitrogen, HNO2, 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 NaN02.), accumulation of, in 

 manures, 340; formation of, 176, 

 178, — in compost heaps, 339, — 

 in electrical discharges, 195; in 

 gunpowder- ma king, 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, 181; culture 

 media for, ■ 171; development of, 

 in deeper soil layers, ).77f in satid 

 filters, 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, 

 17^; 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, 2U; 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, 195; 

 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 n>Q,terials, availability of, 

 181, 



££ 



