How can I extract various Zn fractions from soil samples?

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J. C. Tarafdar

You may go for sequential extraction method. Please go through the attached file and the link www.scialert.net/fulltext/?doi=jci.2007.331.337

The DTPA extraction method by Norvell (1978) is commonly used for evaluating soil fertility status in respect to micro-nutrients cations, i. e. Fe, Zn, Mn and Cu. The universal soil test for alkaline soils (AB-DTPA) is equally effective for determining micro-nutrient cations including Zn in alkaline soils.

M.R. Yadav

Thank u very much sir

Annangi Subba Rao

Dr.Yadav,I wish to further add or supplement to Dr.Tarafdar's pertinent comments.One more multinutrient or univeral soil test which can be used for Zn is Mehlich3(Mehlich,1984) which can be used in acid to neutral soils.For Zinc fractionation we used a sequestional extraction procedure.The following paper gives the details of the method.

Effects of farmyard manure and phosphorus on zinc transformations and phyto-availability in two alfisols of India.By Rupa,T.R. etal.2003.Bioresource Technology 87:279-288.The paper is also available on researchgate.

https:www.researchgate.net/profile/Srinivasarao_Ch/publication/10968178

Article Effects of farmyard manure and phosphorus on zinc transforma...