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| Untersuchte Arbeit: Seite: 53, Zeilen: 1-6 |
Quelle: Wang et al 2003 Seite(n): 1574, Zeilen: 30-38 |
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| [In China, the fertilizer containing REEs for agricultural use was estimated to cover (16 to 20) × 106 hectares in 1995 and the yearly consumption was estimated to cover] more than 3 × 106 hectares since 1998 (Guo, 1999). Widespread use of fertilizers containing REEs in agriculture results in increase of REEs concentrations in plants and soils. Despite the reported increase in agricultural yields by application of these fertilizers, the possible long-term hazardous environmental effects are worth comprehensively investigating. The long-term and continued introduction of certain metals would interrupt the balance in the environment, hence causing serious environmental problems (Wang et al., 2003c).
Guo B S (1999) Recent research advance of rare earth in the field of biology. Chinese Rare Earths, Vol. 20 (1): 64 – 68 Wang X, Shan X, Zhang S (2003c) Effect of exogenous rare earth elements on fraction of heavy metals in soils and bioaccumulation by plants. Communications in Soil Science and Plant Analysis, Vol. 34 (11-12): 1573 – 1588 |
In China, the fertilizer containing REEs for agricultural use was estimated to cover (16 to 20) × 106 hectares in 1995, and the yearly consumption was estimated to cover more than 3 × 106 hectares since 1998.[9] Widespread use of fertilizers containing REEs in agriculture results in increase of REEs concentrations in plants and soils. Despite the reported increase in agricultural yields by application of these fertilizers, the possible long-term hazardous environmental effects are worth comprehensively investigating. The long-term and continued introduction of certain metals would interrupt the balance in the environment, hence causing serious environmental problems.
9. Guo, B.S. Recent research advance of rare earth in the field of biology. Chin. Rare Earth 1999, 20, 64–68. |
Though identical nothing is marked as a citation. The source is mentioned at the end following other references, which have been directly taken from the original text. |
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