Claassen, N.  <br/><br/>
Development and verification using measured soil and plant parameters of a mathematical model for nutrient flux to plant roots growing in soil  (Book) 

 - Indiana  Purdue University  1975 
 - 157 p.  21 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>631.42:581.43:631.811(043) CLA  / 5512