Wang, Shu-Qi <br/><br/>
[Effects of long-term fertilization on enzyme activities in black soil of Northeast China].  [electronic resource] 

 -  Ying yong sheng tai xue bao = The journal of applied ecology  Mar 2008 
 - 551-6 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/>China<br/>Crops, Agricultural--enzymology<br/>Fertilizers<br/>Phosphoric Monoester Hydrolases--metabolism<br/>Soil--analysis<br/>Time Factors<br/>Urease--metabolism<br/>beta-Fructofuranosidase--metabolism