Maximizing the efficiency of fertilizer use by grain crops / 
prepared by FAO Land and Water develpoment Division, AGL and joint FAO/IAEA DIvision of Isotopes and Radiotion Application of Atomic Energy for food and Agriculture Development 
 - Rome :  FAO,  1980. 
 - FAO Fertilizer BULLETTIN ;  No.3 .
<br/><br/> kepunyaan PTSl 
<br/><br/><label>ISBN: </label>9251009546