HELPING PLANTS GROW 



is estimated that for every pound of dry matter produced by 

 common cultivated crops an average of about 300 pounds of 

 water must pass through the plants. It has been found that a 



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Diagram of a plant showing its relations to the soil, air, 

 and water. 



corn plant may lose nine pounds of water in eight and one- 

 half hours. At this rate an acre of corn would lose forty- 

 eight tons of water an amount equivalent to one-half inch 

 rainfall in the given time. 



