Here's a link to a map of the campus,

http://chep.knu.ac.kr/ICFA-Sem?inar/social.php

...you can easily see that the fields are located in the southwest corner of the campus, easily walkable from North Gate(book-choke moon) or if you take a taxi from the subway (take red-line and get off at Chilseong) go to the West Gate (much closer) ... just tell the driver KYUNGPOOK DE-HAKYO (SUH-CHOKE MOON)..

The field is located closest to the WEST GATE. On the picture below, it is listed as #13.

"click" the map for google directions!