Nitrogen fixation and soil fertility proceedings 

 - UP  Peradeniya  1987 
 - 120  lk. 
 - Soil Science Nitrogen Fixation Soil Fertility Sri Lanka 
<br/><br/><label>Nat. Bib. No.: </label>P -799 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>631.45 NIT S.L 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>631.45  1