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1870683 
Journal Article 
Geochemical characteristics of rare earth elements (REEs) in the paddy soil and rice (Oryza sativa L.) system of Kocani Field, Republic of Macedonia 
Smuc, NR; Dolenec, T; Serafimovski, T; Dolenec, M; Vrhovnik, P 
2012 
Yes 
Geoderma
ISSN: 0016-7061
EISSN: 1872-6259 
ELSEVIER 
AMSTERDAM 
183 
1-11 
WOS:000305201700001 
In the Republic of Macedonia, information about rare earth elements (REEs) distribution patterns, transportation and speciation characteristics (from soil to plants) is very rare. Therefore, the concentrations of REEs in Kocani paddy soils and rice samples from the Republic of Macedonia were measured and evaluated. The elevated concentrations of REEs in paddy soils can be explained by contributions from acidic and intermediate igneous rocks, which are one of the main source materials for Kocani paddy soils. Low percentages of REEs were bound to the water-soluble and exchangeable fractions, revealing low mobility of REEs in the investigated paddy soils. Furthermore, small amounts of REEs were detected in rice (Oryza sativa L) grain samples. The calculated transfer values (TF) for REEs in rice samples were also very low, confirming a small accumulation of REEs (La, Ce, Pr, Nd and Sm) by the studied crops and in the Kocani soil-plant system. (C) 2012 Elsevier B.V. All rights reserved. 
Rare earth elements (REEs); Paddy soils; Rice (Oryza sativa L); Distribution; Sequential extraction procedure; Republic of Macedonia