THE CLIMATE OF MICHIGAN. 



707 



southern, interior, portion of the state, and Calnuiet, in the extreme 

 north and on Lake Superior. It will ))e noted that the interior of the 

 state has much higher thermal values than sections near the lakes. 



With further study and research accurate methods will probably be 

 evolved for definnig the suitability of the temperature in any section to 

 meet the plant requirements, but at present only the most general terms 



520Q 



200 



CHART XIV. -Thermal efficiency of Michigan, found lay 

 evaluating air teraperatur in terms of pJant ten5)erature , 

 by use of formuia. 



can be used. The cereal crops grown in Michigan more or less extensive- 

 ly are corn, wheat, oats, barley and rye. They each find temperature 

 conditions to be a limiting factor, to a greater or less degree, in the 

 production of a maximum crop in a rather large per cent of years. 



Corn is grown to a considerable extent in Michigan, especially in the 

 southern portion, but at least in the nortliern portion it is not grown 

 as successfully as it is in the ''Com Belt" states. The plant requires a 

 rather long frostless season, with w^arm nights for best results, and these 



