Haruna, Ahmed Osumanu,  Prof. Madya, Dr. <br/><br/>
Using biochar and urea to improve rice production on tropical acid soils / 
Ahmed Osumanu Haruna, Ali Maru. 
 - Serdang, Selangor :  Universiti Putra Malaysia Press,  2017. 
 - 109 p. :  charts, photographs ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9789673447619 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Government publications--Malaysia.<br/>Organic fertilizers.<br/>Soils.<br/>Urea as fertilizer.