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1¡¢Chang S C , Jackson ML. Fractionation of soil phosphorous in soils . Soil Sci . ,1957 ,84 : 1334- 1447

2¡¢Bowmen R A ,Cole C V. An exploratory method for fractionation of organic phosphorous from grassland. Soil Sci . ,1978 ,125 : 95- 101

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[ Last edited by ewigkeit on 2009-1-19 at 11:13 ]
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Originally posted by yxu003 at 2009-1-19 07:35:
http://www.namipan.com/d/Chang%e ... 1c194311d57d1290a00

[url]http://www.namipan.com/d/Soil%20Sci.%201987%2c%2095-101.pdf/765439deea55ae6a31 ...

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