colored soil below, and containing a calcium carbonate layer 

 at a depth ranging from 1.5 to 4 feet. Associated with tall 

 grassland in a temperate to cool, subhumid climate. 



Chestnuts Soils 



A zonal groups of soils with dark brown surface horizons 

 grading into lighter colored soil below, and a calcium carbon- 

 ate layer varying in depth from 1 to 4 feet. Associated with 

 grassland in temperate to cool and subhumid to semiarid 

 climates, in moister regions than Brown soils, drier than 

 Chernozem. 



Chianophile 



A plant that can endure long-lasting snow-cover during 

 winter and spring, or one that requires snow-cover in winter. 



Chianophobe 



A plant that cannot tolerate long-lasting snow-cover, or 

 one that can live with little or no snow-cover during winter. 



Chill-coma 



The condition in animals caused by exposure to low tem- 

 perature in which most of the physiological processes have 

 been slowed down or arrested. 



Chimera 



An organ with genetically different tissues adjacent to 

 each other, e.g., a green leaf with an area of white tissue. 



Chinook 



A warm, dry wind descending the eastern slopes of the 

 Rocky Mountains in North America onto the adjacent 

 plains, cf. Foehn. In Washington and Oregon coast country 

 a warm, moist, southwest wind. 



Chiseling 



See Subsoiling. 



Chitin 



A nitrogen-containing polysaccharide forming a hard 



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