Alexander, Martin. <br/><br/>
Ecological constraints on nitrogen fixation in agricultural ecosystems 

<br/><br/> Sobretiro de : Advances Microbial Ecology 8:163-183, 1985 
<br/><br/><label>LCCN: </label>18529 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrógeno--Fijación.<br/>Rhizobium.