CHAPTER IV 



Situations Favorable for Mushroom 



Growing 



It is easy to specify in a general way the 

 situations in which mushrooms may be 

 grown. This is best done by describing the 

 conditions necessary for growth, since then 

 adequate light is shed upon the type of situ- 

 ation required. Upon reading this and 

 later sections, it will be observed that, after 

 all, the main factors which are to be regu- 

 lated are those of temperature and moisture, 

 and consequently any situation in which 

 these conditions may be so controlled as to 

 accord with the requirements specified 

 should be satisfactory. 



In France. In France the mushroom in- 

 dustry has fallen heir to the subterranean 

 quarries which now constitute a very exten- 



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