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Transpiration of Wheat Seedlings as Affected 

 by Different Densities of a Complete Nutrient 

 Solution in Water, Sand, and Soil Cultures.') 



Von 



George Bouyoucos, East Lansing, Mich. 



With 3 figures in the text. 



Introduction. 



In a series of studies undertaken to ascertain the effect of 

 various chemical agents and of ditferent densities of Solution upon 

 the transpiration of plants, the following principal topics were in- 

 vestigated: 



1) Transpiration of wheat seedhngs as affected by different 

 densities of a complete nutrient Solution in water, sand, and soil 

 cultures. 



2) Transpiration of corn and bean seedlings as aifected by 

 different densities of a complete nutrient Solution, in water and 

 sand cultures. 



3) Transpiration of wheat seedlings as affected by different 

 densities of non-nutrient salt Solutions, in water and sand cultures. 



4) Transpiration of wheat seedlings as affected by different 

 quantities of various chemical salts, in water and sand cultures. 



5) Transpiration of wheat seedlings as affected by different 

 chemical salts, and by the ions of these salts, in water and sand 

 cultures. 



6) Transpiration of wheat seedlings as affected by different 

 densities of an organic substance, in water cultures. 



7) Trans]>iration of wheat seedlings as affected by different 

 densities of Solution in different sized particles of sand and soil. 



In the present paper, however, only the first topic will be 

 considered. 



^) Contribution from the Laboratory of Soil Technology at Cornell. 

 Beihefte Bot. Centralbl. Bd. XXIX. Abt. I. Heft 1. 1 



