Catalepsy 



The condition of muscular rigidity in which the body 

 and limbs maintain the position in which they are placed. 



Cotalo 



An animal derived by crossing cattle and buffalo. 



Catarobic 



Refers to an aquatic habitat in which slow decomposition 

 of organic matter is taking place, organic substances are given 

 off into the medium, and much oxygen is used but not 

 enough to prohibit the occurrence of aerobic organisms, cf. 

 Oligosaprobic, Polysaprobic, Mesosaprobic. 



Catch Crop 



A crop grown incidentally to the main crop of a farm 

 and usually occupying the land for a short period; or a crop 

 grown to replace a main crop which has failed. 



Catchment Basin 



A unit watershed, an area from which all the drainage 

 water passes into one stream or other body of water. 



Catena 



A group of soils within a specific soil zone, formed from 

 similar parent materials but with unlike characteristics 

 because of differences in relief and drainage. 



Cation 



An ion carrying a positive charge of electricity such as 

 calcium, sodium, and hydrogen, cf. Anion. 



Cation Exchange 



The exchange of cations held by soil absorbing materials 

 such as calcium replacing sodium when calcium sulfate is 

 added to a sodium-rich soil. 



Cation-exchange Capacity 



A measure of the total quantity of exchangeable cations 

 that a soil can hold; preferable to base-exchange capacity. 



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