TEMPERATURE, MOISTURE, LIGHT 



given to laboratory experiments preliminary 

 to such practical tests on a large scale. The 

 results of these laboratory experiments can- 

 not be included here. 



Temperature, Moisture, and Light 



We usually speak of the relation of a 

 plant to the different factors of its environ- 

 ment — such as to temperature, moisture, 

 and light — as if the effects of these factors 

 were very simple; hence easily evaluated, 

 or distinguished one from another. In 

 reality, this is only in the smallest degree 

 true. It has, however, been most thor- 

 oughly demonstrated that under the present 

 methods of mushroom growing a more or 

 less uniform temperature of the air in the 

 mushroom house is highly desirable; the 

 optimum, or best, is judged to be from 

 about 54° to 56° F. If, instead of making 

 reference to the optimum, we consider 

 merely a good range of temperature for the 

 work, we might extend the limits indicated 



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