Compost 



A pile of decomposing organic matter of plant or animal 

 origin in which soil or other amendments such as lime, nitro- 

 gen, and phosphorus may be mixed. 



Concealing Coloration 



Color of plumage, pelage, scales, scutes, skin, or other 

 body covering which brings about some degree of conformity 

 in the appearance of an animal with its biotic or inanimate 

 environment. 



Concentrates 



Feed that has a high content of total digestible nutrients 

 and low fiber content, e. g., grain and grain by-products. 



Conditioned Reflex 



See Reflex. 



Conditioner 



A substance that modifies the characteristics of a ma- 

 terial or medium to which it is added. 



Condition Factor 



A numerical index, usually applied only to fishes, which 

 represents the relationship between length and weight of the 

 animal. 



Conditioning, Environmental 



The modification of the environment of one or more or- 

 ganisms by their activities including Reactions and Coac- 

 tions, e. g., liberation of oxygen by water plants in an 

 aquarium. 



Conductivity 



The total electrolytic content of natural waters, deter- 

 mined by measuring the electrical conductivity. 



Congelifraction 



The splitting of rocks caused by frost. 



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