L akavleva V S,Ryz hak ava N K Spat ial and temporal variat ions of radon con cent rat ion in s oil air Radiat ion M eas ur ement s,2003,36(1-6):385~388.
S un B,Zhou S L,Zhao Q G Evalu at ion of spat ial and temporal ch anges of soil qu alit y b as ed on geost at ist ical anal ysi s in t he hill regi on of s ubt ropical China G eoderma,2003(115):85~89.
[6]
俞海,黄季焜,R ozell e S,等中国东部地区耕地土壤肥力变化趋势研究地理研究,2003,22(3):380~388.
E ric H D,St ephen S A S pat ial and t emporal variab ilit y of t race el ement concent rat ion s in an urb an subt ropical w at ers hed,H on ol ulu,H aw aii A ppl ied G eoch emist ry,2002,17(4):475~492.