Graves, J. E. <br/><br/>
The influence of cropping on the nitrogen-fixing powers of soil  / 
by J. E. Greaves and A. F. Bracken 
 - Utah  :   Utah. Agricultural Experiment Station 
 - 201-206 p. 
<br/><br/> Enc. con otros impresos similares 
<br/><br/><label>LCCN: </label>205761 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos -- EUA <br/>Suelos, nitrógeno en
<br/><br/><label>Dewey Class. No.: </label>PA-C 631.4 B85