Singh, A L <br/><br/>
Nitrogen fixation in Indian rice fields (azolla & blue green algae) 

 - Bikaner:   Agro Botanical Publishers (India, )  1989 
 - 236p. 
<br/><br/><label>ISBN: </label>8185031258 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Subjects--Index Terms: </label>Growth Irrigation 
<br/><br/><label>Universal Decimal Class. No.: </label>631.461.5:582.26   / M9