Chin J Plant Ecol     2005 29 (4):  692-696    ISSN: 1005-264X:  CN: 11-3397/Q PRELIMINARY STUDIES OF WILD FIRE FREQUENCY AND ENVIRONMENTAL CHANGES DURING THE HOLOCENE ON THE ALLUVIAL PLAIN OF THE YUNCHENG BASIN CAO Yan-Feng(), HUANG Chun-Chang, PANG Jiang-Li College of Tourism & Environment, Shaanxi Normal University, Xi'an 710062, China Received 2004-10-18  Revised null  Online 2005-07-31 Reference   Corresponding author: