Principles of crop production :  Theory, Techniques and Technology / 
Acquaah George . 
 - 2nd ed. 
 - New Jersey :  Pearson/Prentice Hall,  2001. 
 - xxvii,740 p.;  ill. 
<br/><br/><label>ISBN: </label>0131145568 
<br/><br/><label>LC Class. No.: </label>SB185  / .A27 2001