Liu, Xuejun <br/><br/>
[Effect of reduced N application on N utilization and balance in winter wheat-summer maize cropping system].  [electronic resource] 

 -  Ying yong sheng tai xue bao = The journal of applied ecology  Mar 2004 
 - 458-62 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1001-9332 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops, Agricultural<br/>Fertilizers<br/>Nitrates--analysis<br/>Nitrogen--metabolism<br/>Soil--analysis<br/>Triticum--growth & development<br/>Zea mays--growth & development