effervescence exceeds 50 cm then a value of "99" is 

 indicated) 



AWHC = available water holding capacity (cm H^O/SO cm soil 



or cm HjO/number of cm to bedrock) 



the terms "low", "medium", "high", and "very high" as 

 used in the text in reference to AWHC are defined as 

 follows : 



low = - 2 . 5 cm 

 medium = 2.6 - 5 . cm 

 high = 5.1 - 7 . 5 cm 

 very high = > 7.6 cm 



94 



