Subdominant 



A species in a community that exerts much less Domi- 

 nance (q. v.) than the Dominant species. 



Suberin 



The waxy material found in walls of chiefly cork cells 



in plants. 



Suberization 



The process of Suberin formation in plants. 



Subhumid 



Refers to climatic regions where the moisture conditions 

 range from 20 inches in the cool parts to 60 inches in the 

 hot parts; and where the natural vegetation consists chiefly 

 of tall grasses, and where many kinds of crops can be grown 

 without irrigation, or dry farming procedures. 



Subinfluent 



An organism that has less effect than an Influent in a 

 community and is present usually for only a part of the year. 



Subirrigotion 



The control of the water table so as to raise it near or 

 into the root zone. 



Sublittoral 



The lower division, at a depth from about 40 or 60 

 meters to about 200 meters in the sea, of the Neritic or Ben- 

 thic zone, below the Littoral division. These terms apply 

 also in a general way to lakes. 



Subpolar Region 



Approximately the region south of the Tundra, occupied 

 by Boreal forest. 



Subsequent Reproduction 



Trees which have grown up in openings in the forest 



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