Solonization 



The process of soil formation in semiarid and arid 

 climates where Saline soil (q. v.) or Solonetz is formed, cf. 

 Podzolization, Calcification. 



Solstice 



The time of the year when the sun is above the point 

 which is farthest north or south of the equator, in the 

 northern hemisphere the summer solstice is about June 21, 

 the winter solstice about December 22. 



Solum 



The upper part of the Soil profile (q. v.) above the parent 

 material, usually the A and B horizons; often considered the 

 true soil because of its development by soil-building forces. 

 cf. Soil. 



Soma 



The cells of an organism exclusive of those concerned 

 with Sexual reproduction. 



Somatic 



Refers to the Soma, or the non-reproductive parts of an 

 organism. 



Sonoran Life Zone 



The part of the Austral life zone (q. v.) lying west of the 

 100th meridian, divided into Transition, Upper Sonoran, 

 and Lower Sonoran zones. 



Spat 



A juvenile form of a bivalve mollusk such as the oyster. 



Spawn 



(1) The eggs of frogs, fishes, oysters and other aquatic 

 animals. (2) The Mycelium (q. v.) of certain fungi especially 

 of the mushroom in which it is used for propagation. 



Spay 



To remove the ovaries from a female animal. 



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