Singh, S. S. <br/><br/>
Soil fertility and nutrient management / 
S S Singh 
 - 2nd rev. ed. 
 - Ludhiana :   Kalyani Publishers,   2004. 
 - viii, 241 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers.<br/>Soil fertility.<br/>Crops--Nutrition.<br/>Crops--Nutrition.<br/>Fertilizers.<br/>Soil fertility.
<br/><br/><label>Dewey Class. No.: </label>631.422  / SIS 2004