Alex P, Suri A K and Gupta C K 1998 Processing of xenotime concentrate. Hydrometallurgy 50, 331–338.CrossRef
Amann B T, Mulqueen P and Horrocks W D 1992 A continuous spectrophotometric assay for the activation of plant NAD kinase by calmodulin, calcium(II), and europium(III) ions. J. Biochem. Bioph. Meth. 25, 207–217.
Andres Y, Thouand G, Boualam M and Mergeay M 2000 Factors influencing the biosorption of gadolinium by micro-organisms and its mobilisation from sand. Appl. Microbiol. Biot. 54, 262–267.
Åström M 2001 Abundance and fractionation patterns of rare earth elements in streams affected by acid sulphate soils. Chem. Geol. 175, 249–258.
Åström M and Corin N 2003 Distribution of rare earth elements in anionic, cationic and particulate fractions in boreal humus-rich streams affected by acid sulphate soils. Water Res. 37, 273–280.PubMed
Aubert D, Stille P and Probst A 2001 REE fractionation during granite weathering and removal by waters and suspended loads: Sr and Nd isotopic evidence. Geochim. Cosmochim. Ac. 65, 387–406.CrossRef
Bakou A, Buser C, Dandulakis G, Brudvig G and Ghanotakis D F 1992 Calcium binding sites of photosystem II as probed by lanthanides. Biochim. Biophys. Acta 1099, 131–136.
Bakou A and Ghanotakis D F 1993 Substitution of lanthanides at the calcium site(s) in Photosystem II affects electron transport from tyrosine Z to P680 positive. Biochim. Biophys. Acta 1141, 303–308.
Bauluz B, Mayayo M J, Fernandez-Nieto C and Lopez J M G 2000 Geochmistry of Precambrian and Paleozoic siliciclastic rocks from the Iberian Range (NE Spain): implications for source-area weathering, sorting, provenance, and tectonic setting. Chem. Geol. 168, 135–150.CrossRef
Berg T, Royset O, Steinnes E and Vadset M 1995 Atmospheric trace-element deposition - principal component analysis of ICP-MS data from moss samples. Environ. Pollut. 88, 67–77.PubMedCrossRef
Bibak A, Stürup S, Knudsen L and Gundersen V 1999 Concentrations of 63 elements in cabbage and sprouts in Denmark. Commun. Soil Sci. Plan 30, 2409–2418.
Brantley S L, Liermann L, Bau M and Wu S 2001 Uptake of trace elements and rare earth elements from hornblende by a soil bacterium. Geomicrobiol. J. 18, 37–61.
Braun J J, Pagel M, Herbillon A and Rosin C 1993 Mobilization and redistribution of REEs and thorium in a syenitic lateritic profile- a mass-balance study. Geochim. Cosmochim. Acta 57, 4419–4434.CrossRef
Braun JJ, Viers J, Dupre B, Polve M, Ndam J and Muller JP 1998 Solid/liquid REE fractionation in the lateritic system of Goyoum, east Cameroon: The implication for the present dynamics of the soil covers of the humid tropical regions. Geochim. Cosmochim. Acta 62, 273–299.CrossRef
Brewer J M, Carreira L A, Irwin R M and Elliott J I 1981 Binding of terbium III to yeast enolase. J. Inorg. Biochem. 14, 33–44.PubMedCrossRef
Brown P H, Rathjen A H, Graham R D and Tribe D E 1990 Rare earth elements in biological systems.In Handbook on the Physics and Chemistry of Rare Earths (eds. Gschneidner Jr and Eyring L) 13, 423–453. Elsevier Science Publishers, Amsterdam.
Buckingham S, Maheswaran J, Meehan B and Peverill K 1999 The role of applications of rare earth elements in enhancement of crop and pasture production. Rare Earths ‘98, Mater. Sci. Forum 315, 339–347.
Buhn B, Rankin A H, Schneider J and Dulski P 2002 The nature of orthomagmatic, carbonatitic fluids precipitating REE, Sr-rich fluorite: fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chem. Geol. 186, 75–98.
Burda K, Strzalka K and Schmid GH 1995 Europium- and dysprosium-ions as probes for the study of calcium binding sites in photosystem II. Z. Naturforsch. C 50, 220–230.
Cao X D, Chen Y, Gu Z M and Wang X R 2000a Determination of trace rare earth elements in plant and soil samples by inductively coupled plasma-mass spectrometry. Int. J. Environ. An. Ch 76, 295–309.
Cao X D, Wang X R and Zhao G W 2000b Assessment of the bioavailability of rare earth elements in soils by chemical fractionation and multiple regression analysis. Chemosphere 40, 23–28.PubMedCrossRef
Cao X D, Chen Y, Wang X R and Deng X H 2001 Effects of redox potential and pH value on the release of rare earth elements from soil. Chemosphere 44, 655–661.PubMedCrossRef
Chakhmouradian A R 1996 On the development of niobium and rare earth minerals in the monticellite-calcite carbonatite of the Oka complex, Quebec. Can. Mineral. 34, 479–484.
Chen W J, Gu Y H, Zhao G W, Tao Y, Luo, J P and Hu T D 2000 Effects of rare earth ions on activity of RuBPcase in tobacco. Plant Sci. 152, 145–151.CrossRef
Chen W J, Tao Y, Gu Y H and Zhao G W 2001 Effect of lanthanide chloride on photosynthesis and dry matter accumulation in tobacco seedlings. Biol. Trace Elem. Res. 79, 169–176.PubMedCrossRef
Chiarenzelli J, Aspler L, Dunn C, Cousens B, Ozarko D and Powis K 2001 Multi-element and rare earth element composition of lichens, mosses and vascular plants from the Central Barrenland, Nunavut, Canada. Appl. Geochem. 16, 245–270.CrossRef
Dia A, Gruau G, Olivie-Lauquet G, Riou C, Molenat J and Curmi P 2000 The distribution of rare earth elements in groundwaters: Assessing the role of source-rock composition, redox changes and colloidal particles. Geochim. Cosmochim. Acta 64, 4131–4151.CrossRef
Diatloff E, Asher C J and Smith F W 1993 Use of geochem-PC to predict rare-earth element (REE) species in nutrient solutions. Plant Soil 156, 251–254.CrossRef
Diatloff E, Smith F W and Asher C J 1995a Rare-earth elements and plant growth. 2. Responses of corn and mungbean to low concentrations of lanthanum in dilute, continuously flowing nutrient solutions. J. Plant Nutr. 18, 1977–1989.
Diatloff E, Smith F W and Asher C J 1995b Rare-earth elements and plant growth. 3. Responses of corn and mungbean to low concentrations of cerium in dilute, continuously flowing nutrient solutions. J. Plant Nutr. 18, 1991–2003.
Diatloff E, Smith F W and Asher C J 1995c Rare-earth elements and plant growth. 1. Effects of lanthanum and cerium on root elongation of corn and mungbean. J. Plant Nutr. 18, 1963–1976.
Diatloff E, Asher C J and Smith F W 1996 Concentrations of rare earth elements in some Australian soils. Aust. J. Soil Res. 34, 735–747.CrossRef
Diatloff E, Asher C J and Smith FW 1999 The effects of rare earth elements on the growth and nutrition of plants. Rare Earths ‘98, Mater. Sci. Forum 315, 354–360.
Dong M W, Li W J and Tao Z Y 2002 Use of the ion exchange method for the determination of stability constants of trivalent metal complexes with humic and fulvic acids II. Tb3+, Yb3+ and Gd3+ complexes in weakly alkaline conditions. Appl. Radiat. Isotopes 56, 967–974.
Dong W M, Wang X K, Bian X Y, Wang A X, Du J Z and Tao Z Y 2001 Comparative study on sorption/desorption of radioeuropium on alumina, bentonite and red earth: effects of pH, ionic strength, fulvic acid, and iron oxides in red earth. Appl. Radiat. Isotopes 54, 603–610.
Drobner U and Tyler G 1998 Conditions controlling relative uptake of potassium and rubidium by plants from soils. Plant Soil 201, 285–293.CrossRef
Dupré B, Viers J, Dandurand J L, Polve M, Benezeth P, Vervier P and Braun J J 1999 Major and trace elements associated with colloids in organic-rich river waters: ultrafiltration of natural and spiked solutions. Chem. Geol. 160, 63–80.
Ercit T S 2002 The mess that is ‘allanite’. Can. Mineral. 40, 1411–1419.
Esser K B, Bockheim, J G and Helmke P A 1991 Trace element distribution in soils formed in the Indiana Dunes USA. Soil Sci. 152, 340–350.
Folkeson L, Nyholm N E I and Tyler G 1990 Influence of acidity and other soil properties on metal concentrations in forest plants and animals. Sci. Total Environ. 96, 211–233.CrossRef
Forster H J 1998 The chemical composition of REE-Y-Th-U-rich accessory minerals in peraluminous granites of the Erzgebirge-Fichtelgebirge region, Germany. Part II: Xenotime. Am. Mineral. 83, 1302–1315.
Fu F F, Akagi T and Shinotsuka K 1998 Distribution pattern of rare earth elements in fern - Implication for intake of fresh silicate particles by plants. Biol. Trace Elem. Res. 64, 13–26.PubMed
Fu F F, Akagi T, Yabuki S and Iwaki M 2001 The variation of REE (rare earth elements) pattern in soil-grown plants: a new proxy for the source of rare earth elements and silicon in plants. Plant Soil 235, 53–64.CrossRef
Fu F F, Akagi T and Yabuki S 2002 Origin of silica particles found in the cortex of Matteuccia roots. Soil Sci. Soc. Am. J. 66, 1265–1271.CrossRef
Ghanotakis D F, Babcock G T and Yocum C F 1985 Structure of the oxygen-evolving complex of photosystem II Calcium and lanthanum compete for sites on the oxidizing side of photosystem II which control the binding of water-soluble polypeptides and regulate the activity of the manganese complex. Biochim. Biophys. Acta 809, 173–180.
Gorbunov A V, Frontasyeva M V, Gundorina S F, Onischenko T L, Maksjuta B B and Pal C S 1992 Effect of agricultural use of phosphogypsum on trace elements in soils and vegetation. Sci. Total Environ. 122, 337–346.CrossRef
Gramaccioli C M, Diella V and Demartin F 1999 The role of fluoride complexes in REE geochemistry and the importance of 4f electrons: some examples in minerals. Eur. J. Mineral. 11, 983–992.
Greenwood N N and Earnshaw A 1984 Chemistry of the elements. Pergamon Press, Oxford.
Gu Z M, Wang X R, Cheng J, Wang L S and Dai L M 2000 Effects of sulfate on speciation and bioavailability of rare earth elements in nutrient solution. Chem. Spec. Bioavailab. 12, 53–58.
Gu Z M, Wang X R, Gu X Y, Cheng J, Wang L S, Dai L M and Cao M 2001 Determination of stability constants for rare earth elements and fulvic acids extracted from different soils. Talanta 53, 1163–1170.CrossRefPubMed
Harlavan Y and Erel Y 2002 The release of Pb and REE from granitoids by the dissolution of accessory phases. Geochim. Cosmochim. Acta 66, 837–848.CrossRef
He Y W and Loh C S 2000 Cerium and lanthanum promote floral initiation and reproductive growth ofArabidopsis thaliana
. Plant Sci. 159, 117–124.PubMedCrossRef
Hong F S, Wei Z G, Tao Y, Wan S K, Yang Y T, Cao X D and Zhao G W 1999a Distribution of rare earth elements and structure characterization of chlorophyll-lanthanum in a natural plant fernDicranopteris dichotoma. Acta Bot. Sin. 41, 851–854.
Hong F S, Wei Z G and Zhao G W 2001 Studies of bound form on rare earths in a natural plant fernDicranopteris dichotoma by spectroscopy. Chem. J. Chinese U 22, 1790–1794.
Hong F S, Wang L, Meng X X, Wei Z and Zhao G W 2002 The effect of cerium (III) on the chlorophyll formation in spinach. Biol. Trace. Elem. Res. 89, 263–276.
Hong W X, He S Y, Huang S H, Wang Y, Hou H Q and Zhu X K 1999b A Raman spectral studies of rare-earth (REE) fluoro-caronate minerals. Spectrosc. Spect. Anal. 19, 546–549.
Hu X, Ding Z H, Chen Y J, Wang X R and Dai L M 2002 Bioaccumulation of lanthanum and cerium and their effects on the growth of wheat (Triticum aestivum
L.) seedlings. Chemosphere 48, 621–629.PubMedCrossRef
Ishikawa S, Wagatsuma T and Ikarashi T 1996 Comparative toxicity of Al3+, Yb3+, and La3+ to root tip cells differing in tolerance to high Al3+ in terms of ionic potentials of dehydrated trivalent cations. Soil Sci. Plant Nutr. 42, 613–625.
Ivanova G F, Cherkasova E V and Naumov V B 1996 Mineral composition and formation conditions of the Piatang tin-tungsten deposit, south China. Geol. Ore. Deposit. 38, 137–150.
Johannes E, Brosnan J M and Sanders D 1992 Calcium channels in the vacuolar membrane of plants - multiple pathways for intracellular calcium mobilization. Philos. T. Roy. Soc. B 338, 105–112.
Karukstis K K and Gruber S M 1986 Effect of trivalent lanthanide cations on chlorophyll fluorescence and thylakoid membrane stacking. Biochim. Biophys. Acta 851, 322–326.
Kelley C, Curtis A J, Uno, J K and Berman C L 2000 Spectroscopic studies of the interaction of Eu(III) with roots of water hyacinth. Water Air Soil Poll. 119, 171–176.CrossRef
Kelley C, Mielke R E, Dimaquibo D, Curtis A J and Dewitt J G 1999 Adsorption of Eu(III) onto roots of water hyacinth. Environ. Sci. Technol. 33, 1439–1443.CrossRef
Klusener B, Boheim G, Liss H, Engelberth J and Weiler E W 1995 Gadolinium-sensitive, voltage-dependent calcium-release channels in the endoplasmic reticulum of a higher-plant mechanoreceptor organ. Embo J. 14, 2708–2714.PubMed
Land M, Ohlander B, Ingri J and Thunberg J 1999 Solid speciation and fractionation of rare earth elements in a spodosol profile from northern Sweden as revealed by sequential extraction. Chem. Geol. 160, 121–138.CrossRef
Lewis B D and Spalding E P 1998 Nonselective block by La3+
ion channels involved in signal transduction. J. Membrane Biol. 162, 81–90.CrossRef
Li F L, Shan X Q, Zhang T H and Zhang S Z 1998 Evaluation of plant availability of rare earth elements is soils by chemical fractionation and multiple regression analysis. Environ. Pollut. 102, 269–277.CrossRef
Li F L, Shan X Q and Zhang S Z 2001 Evaluation of single extractants for assessing plant availability of rare earth elements in soils. Commun. Soil Sci. Plan. 32, 2577–2587.
Markert B 1987 The pattern of distribution of lanthanide elements in soils and plants. Phytochemistry 26, 3167–3170.CrossRef
Markert B and Deli Z 1991 Inorganic chemical investigations in the forest biosphere reserve near Kalinin, USSR. 2.The distribution of lanthanide elements in the vegetation cover. Vegetatio 97, 57–62.
Markert B and Li ZD 1991 Natural background concentrations of rare-earth elements in a forest ecosystem. Sci. Total Environ. 103, 27–35.CrossRef
Masau M, Cerny P and Chapman R 2000 Dysprosian xenotime-(Y) from the Annie Claim no.3 granitic pegmatite, southeastern Manitoba, Canada: Evidence of the tetrad effect? Can. Mineral 38, 899–905.
McCarthy J F, Sanford W E and Stafford P L 1998 Lanthanide field tracers demonstrate enhanced transport of transuranic radionuclides by natural organic matter. Environ. Sci. Technol. 32, 3901–3906.CrossRef
Mills J D and Hind G 1978 Use of the fluorescent lanthanide terbium ion as a probe for cation binding sites assocated with isolated chloroplast thylakoid membranes. Photochem. Photobiol. 28, 67–74.
Minarik L, Zigova A, Bendl J, Skrivan P and St’astny M 1998 The bahaviour of rare earth elements and Y during the rock weathering and soil formation in the Ricany granite massif, Central Bohemia. Sci. Total Environ. 215, 101–111.
Morishima I, Kurono M and Shiro Y 1986 Presence of endogenous calcium ion in horseradish peroxidase. Elucidation of metalbinding site by substitutions of divalent and lanthanide ions for calcium and use of metal-induced NMR proton and calcium-113 resonances. J. Biol. Chem. 261, 9391–9399.PubMed
Morrison J F and Cleland W W 1983 Lanthanide ATP complexes determination of their dissociation constants and mechanism of action as inhibitors of yeast hexo kinase. Biochemistry-US 22, 5507–5513.
Nagao S, Rao R R, Killey R W D and Young J L 1998 Migration behaviour of Eu(III) in sandy soil in the presence of dissolved organic materials. Radiochim. Acta 82, 205–211.
Nakanishi T M, Takahashi J and Yagi H 1997 Rare earth element, Al, and Sc partition between soil and Caatinger wood grown in north-east Brazil by instrumental neutron activation analysis. Biol. Trace Elem. Res. 60, 163–174.PubMed
NE 1993 Nationalencyklopedin (National Encyclopedia of Sweden) vol. 12. Höganäs, Sweden.
Neal C, Jarvie H P, Whitton B A and Gemmell J 2000 The water quality of the River Wear, north-east England. Sci. Total Environ. 251/252, 153–172.
Nesbitt H W and Markovics G 1997 Weathering of granodioritic crust, long-term storage of elements in weathering profiles, and petrogenesis of siliciclastic sediments. Geochim. Cosmochim. Acta 61, 1653–1670.
Nikonov V V, Lukina N V and Frontasyeva M V 1999 Trace elements in Al-Fe-humus podzolic soils subjected to aerial pollution from the copper-nickel production industry in conditions of varying lithogenic background. Eurasian. Soil Sci. 32, 338–349.
Ohlander B, Ingri J, Land M and Schönberg H 2000 Change of Sm-Nd isotope composition during weathering of till. Geochim. Cosmochim. Acta 64, 813–820.
Olmez I, Sholkovitz E R, Hermann D and Eganhouse R P 1991 Rare-earth elements in sediments off southern California - a new anthropogenic indicator. Environ. Sci. Technol. 25, 310–316.CrossRef
Ono T 2000 Effects of lanthanide substitution at Ca2+
-site on the properties of the oxygen evolving center of Photosystem II. J. Inorg. Biochem. 82, 85–91.PubMedCrossRef
Ozaki T, Ambe S, Enomoto S, Minai Y, Yoshida S and Makide Y 2002 Multitracer study of the uptake mechanism of yttrium and rare earth elements by autumn fern. Radiochim. Acta 90, 303–307.CrossRef
Ozaki T, Enomoto S, Minai Y, Ambe S and Makide Y 2000 A survey of trace elements in pteridophytes. Biol. Trace Elem. Res. 74, 259–273.PubMedCrossRef
Pan Y M, Fleet M E and Barnett R L 1994 Rare-earth mineralogy and geochemistry of the Mattagami lake volcanogenic massive sulfide deposit, Quebec. Can. Mineral. 32, 133–147.
Pang X, Li DC and Peng A 2002 Application of rare-earth elements in the agriculture of China and its environmental behavior in soil. Environ. Sci. Pollut. R 9, 143–148.CrossRef
Price R C, Gray C M, Wilson R E, Frey F A and Taylor S R 1991 The effects of weathering on rare-earth element, Y and Ba abundances in Tertiary basalts from southeastern Australia. Chem. Geol. 93, 245–265.CrossRef
Quiquampoix H, Ratcliffe R G, Ratkovic S and Vucinic Z 1990 Proton and phosphorus-31 NMR investigation of gadolinium uptake in maize roots. J. Inorg. Biochem. 38, 265–276.CrossRef
Ran Y and Liu Z 1999 Contents and distribution of rare earth elements in main types of soil in China. J. Rare Earth 17, 213–217.
Rühling Å and Tyler G 2004 Changes in the atmospheric deposition of sixty elements between 1975 and 2000 in south Sweden, as measured by moss analysis. Environ. Pollut. (accepted).
Sabourdy G, Sagon JP and Pastier P 1997 The chemical composition of xenotime from the Limousin region, Massif-Central, France. Can. Mineral. 35, 937–946.
Schijf J and Byrne RH 2001 Stability constants for mono- and dioxalato-complexes of Y and the REE, potentially important species in groundwaters and surface freshwaters. Geochim. Cosmochim. Acta 65, 1037–1046.CrossRef
Schwenke H and Wagner E 1992 A new concept of root exudation. Plant Cell Environ. 15, 289–299.
Takada J, Sumino T, Tanaka Y, Nishimura K and Akaboshi M 1998 Correlation between terbium and the other rare earth element contents in fern leaves. J. Radioanal. Nucl. Ch 236, 35–38.
Taunton A E, Welch S A and Banfield J F 2000a Microbial controls on phosphate and lanthanide distributions during granite weathering and soil formation. Chem. Geol. 169, 371–382.CrossRef
Taunton A E, Welch S A and Banfield J F 2000b Geomicrobiological controls on light rare earth element, Y and Ba distributions during granite weathering and soil formation. J. Alloy Compd. 303, 30–36.CrossRef
Texier A C, Andres Y, Illemassene M and Le Cloirec P 2000 Characterization of lanthanide ions binding sites in the cell wall ofPseudomonas aeruginosa
. Environ. Sci. Technol. 34, 610–615.CrossRef
Todorovsky D S, Minkova N L and Bakalova D P 1997 Effect of the application of superphosphate on rare earths’ content in the soil. Sci. Total Environ. 203, 13–16.
Tyler G 1980 Metals in sporophores of basidiomycetes. T. Brit. Mycol. Soc. 74, 41–49.
Tyler G 2004a Vertical distribution of major, minor, and rare elements in a Haplic Podzol. Geoderma 119, 277–290.CrossRef
Tyler, G 2004b Ionic charge, radius, and potential control root/soil concentration ratios of fifty cationic elements in the organic horizon of a beech (Fagus sylvatica) forest Podzol. Sci. Total Environ. (accepted).
Tyler, G and Olsson T 2001a Concentrations of 60 elements in the soil solution as related to the soil acidity. Eur. J. Soil Sci. 52, 151–165.
Tyler, G and Olsson T 2001b Plant uptake of major and minor elements as influenced by soil acidity and liming. Plant Soil 230, 307–321.CrossRef
Tyler, G and Olsson T 2002 Conditions related to solubility of rare and minor elements in forest soils. J. Plant Nutr. Soil Sci. 165, 594–601.CrossRef
Volokh A A, Gorbunov A V, Gundorina S F, Revich B A, Frontasyeva M V and Pal CS1990 Phosphorus fertilizer production as a source of rare-earth elements pollution of the environment. Sci. Total Environ. 95, 141–148.PubMedCrossRef
Wahid P A, Valiathan M S, Kamalam N V, Eapen J T, Vijayalakshmi S, Prabhu R K and Mahalingam T R 2000 Effect of rare earth elements on growth and nutrition of coconut palm and root competition for these elements between the palm andCalotropis gigantea
. J. Plant Nutr. 23, 329–338.CrossRef
Wang Y Q, Sun J X, Chen H M and Guo F Q 1997 Determination of the contents and distribution characteristics of REE in natural plants by NAA. J. Radioanal Nucl. Ch 219, 99–103.
Wang Z W, Shan X Q and Zhang S Z 2001a Comparison of speciation and bioavailability of rare earth elements between wet rhizophere soil and air-dried bulk soil. Anal. Chim. Acta 441, 147–156.
Wang Z J, Liu D F, Lu P and Wang C X 2001b Accumulation of rare earth elements in corn after agricultural application. J. Environ. Qual. 30, 37–45.PubMedCrossRef
Wei Y Z and Zhou X B 2000 Effect of neodymium on physiological activities in oilseed rape during calcium starvation. J. Rare Earth 18, 57–61.
Wei Z G, Yin M, Zhang X, Hong F S, Li B, Tao Y, Zhao G W and Yan C H 2001 Rare earth elements in naturally grown fernDicranopteris linearis
in relation to their variation in soils in South-Jiangxi region (Southern China). Environ. Pollut. 114, 345–355.PubMed
Wen B, Yuan D A, Shan X Q, Li F L and Zhang S Z 2001 The influence of rare earth element fertilizer application on the distribution and bioaccumulation of rare earth elements in plants under field conditions. Chem. Spec. Bioavailab. 13, 39–48.
Wu Z H, Luo J, Guo H Y, Wang X R and Yang C S 2001a Adsorption isotherms of lanthanum to soil constituents and effects of pH, EDTA and fulvic acid on adsorption of lanthanum onto goethite and humic acid. Chem. Spec. Bioavailab. 13, 75–81.
Wu Z H, Wang X R, Zhang Y F, Dai L M and Chen Y J 2001b Effects of apatite and calcium oxyphosphate on speciation and bioavailability of exogenous rare earth elements in the soil-plant system. Chem. Spec. Bioavailab. 13, 49–56.
Wutscher H K and Perkins R E 1993 Acid extractable rare-earth elements in Florida Citrus soils and trees. Commun. Soil Sci. Plan. 24, 2059–2068.
Wyttenbach A, Furrer V, Schleppi P and Tobler L 1998 Rare earth elements in soil and in soil-grown plants. Plant Soil 199, 267–273.CrossRef
Wyttenbach A, Schleppi P, Bucher J, Furrer V and Tobler L 1994 The accumulation of the rare-earth elements and of scandium in successive needle age classes of Norway spruce. Biol. Trace Elem. Res. 41, 13–29.PubMedCrossRef
Xie Z B, Zhu J G, Chu H Y, Zhang Y L, Zeng Q, Ma H L and Cao Z H 2002 Effect of lanthanum on rice production, nutrient uptake, and distribution. J. Plant Nutr. 25, 2315–2331.CrossRef
Xu X K, Zhu W Z, Wang Z J and Witkamp G J 2002 Distribution of rare earths and heavy metals in field-grown maize after application of rare earth-containing fertilizer. Sci. Total Environ. 293, 97–105.PubMedCrossRef
Yoshida S and Muramatsu Y 1997 Determination of major and trace elements in mushroom, plant and soil samples collected from Japanese forests. Int. J. Environ. An. Ch 67, 49–58.
Yoshida S, Maramutsu Y, Tagami K and Uchida S 1998 Concentrations of lanthanide elements, Th, and U in 77 Japanese surface soils. Environ. Int. 24, 275–286.CrossRef
Zhang S Z, Shan X Q and Li F L 2000 Low-molecular-weightorganic-acids as extractant to predict plant bioavailability of rare earth elements. Int. J. Environ. An. Ch 76, 283–294.
Zhang S Z and Shan X Q 2001 Speciation of rare earth elements in soil and accumulation by wheat with rare earth fertilizer application. Environ. Pollut. 112, 395–405.PubMedCrossRef
Zhu J G, Chu H Y, Xie Z B and Yagi K 2002 Effects of lanthanum on nitrification and ammonification in three Chinese soils. Nutr. Cycl. Agroecosys. 63, 309–314.