Colwell, J.D. <br/><br/>
Estimating fertilizer requirements :  a quantitative approach / 
J.D. Colwell. 
 - Wallingford :  CAB International,  1994. 
 - x, 262 p. :  24 cm. 
<br/><br/>Includes bibliographical references (p.256-259) and index. 
<br/><br/><label>ISBN: </label>0851989055 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers--Application<br/>Soil fertility
<br/><br/><label>Dewey Class. No.: </label>631.8