Whitehead, D.C. <br/><br/>
The role of nitrogen in grassland productivity :  a review of info rmation from temperate regions / 
by D. C. Whitehead. 
 - Farnham Royal :  Commonwealth Agricultural Bureaux,  1970. 
 - [1], viii, 202 p. :  ill. ;  23 cm. 
 - Commonwealth Bureau of Pastures and Field Crops, Hurley, Eng. (Berks hire). Bulletin ;  48 .
<br/><br/>Includes bibliographical references (p. 162-195.) 
<br/><br/><label>ISBN: </label>0851980155 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen fertilizers.<br/>Pastures--Fertilizers.
<br/><br/><label>Dewey Class. No.: </label>633.20854