MUSHROOM GROWING 



land cement, the finer grades of sand, etc. 

 Many antiquated beer storage cellars of lim- 

 ited capacity are in use in various cities. 

 Abandoned coal mines are certainly unsuit- 

 able as usually left, but it is possible that 

 there are hill coal mines in some sections 

 which would repay investigation from the 

 standpoint of commercial mushroom pro- 

 duction. Natural caves in the limestone 

 section of Missouri have been used success- 

 fully for a time. Often poor arrangements 

 have been made for removing the old beds, 

 and after an accumulation of bedding ma- 

 terial has continued for several years, with 

 an attending increase in mushroom enemies, 

 the old cave garden has too often been 

 abandoned for a new one. Again, such 

 caves are not always accessible, and the cost 

 of having manure delivered from a distance 

 may be prohibitive. Natural caves occur 

 in Kentucky, Indiana, Ohio, Virginia, and 

 Arkansas, and perhaps some of these may in 

 time be available. Caves or deep cellars 

 have always the advantage of permitting 



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