Colwell, J. D. <br/><br/>
Computations for studies of soil fertility and fertilizer requiremen ts / 
by J.D. Colwell. 
 - Slough :  Commonwealth Agricultural Bureaux,   1978. 
 - ix, 297 p. :  ill. ;   30 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0851984371 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures-- Data processing.<br/>Soil fertility<br/>FORTRAN (Computer program language)
<br/><br/><label>Dewey Class. No.: </label>631.8/1