CONTENTS xxi 



PAGE 



Inoculating the soil ....... 333 



With old soil 334 



With artificial cultures 334 



Each crop has different bacteria ..... 335 



Plowing under a green-manure ...... 337 



Leguminous crops for green-manuring .... 338 



Non-leguminous crops for green manuring. . . . 341 



The renovation of worn-out soils ..... 342 



How soils have become worn out .... 343 



How to build up worn-out soils ..... 344 



CHAPTER XIII. FARM MANURES 



Manuring the oldest means of maintaining fertility . . 346 

 How manure benefits the soil . . . . . .346 



Its value as plant food. ...... 347 



The chemist's valuations not the fanner's . . . 347 



Its influence on soil texture ..... 347 



Bacteria in manure ....... 348 



Comparative plant-food value of different manures . . 349 



The quality of manure. ....... 350 



How manure is wasted . . . . . . .351 



Throwing it away . . . . . . .351 



Loss from leaching ....... 352 



Loss from fermentation ...... 353 



Loss in liquid portions ...... 354 



How to care for manure ....... 354 



Covered barn-yards ....... 355 



Manure pits, sheds and cellars ..... 355 



Preventing fermentation ...... 356 



The use of bedding 357 



Mineral absorbents ....... 357 



The amount of manure made on the farm . . . 358 



When to apply manure ....... 360 



How much to use ........ 361 



How to apply 363 



CHAPTER XIV. COMMERCIAL FERTILISERS 



Rapid growth of fertiliser trade ..... 364 



What commercial fertilisers are made of . . . . 866 



State supervision of the fertiliser trade .... 367 



