Table 1. Distribution of study plots by provinces.

Provinces	Seoul, Gyeonggi	Gang-won	Chungbuk	Chungnam	Jeon-buk	Jeon-nam	Gyeongbuk	Gyeongnam	Jeju	Total
No. of NFI plots	1,302	2,880	1,049	1,175	982	1,491	3,507	2,190	563	15,139
No. of plots dominated more than 50% by Q. mongolica	177	562	94	38	38	42	326	135	9	1,421