Author(s):

Rakesh Kumar and PS Sangwan

Abstract: A laboratory experiment was conducted to determine the distribution of Zinc fractions and their relationship with soil properties in different soil series of Haryana. Surface soil samples (0-15 cm) were collected from each soil series using Global Positioning System (GPS). The soil samples were processed and analyzed for the determination of total Zn and zinc fractions (exchangeable, organic bound, calcium carbonate bound and residual). Zinc fractions were analyzed by sequential extraction procedure. Results showed that total amount of the Zn ranged from 36.02 to 72.45 mg kg^-1 in all the soil series. The amount Ex- Zn, OM- Zn and CaCO₃- Zn, comprised 0.4-1.9, 2.1-7.7 and 3.5-17.6% of total Zn, respectively.The highest fraction of the total Zn (74.0-90.4%) was present in the residual fraction. The residual fraction varied from 30.68 to 50.02 mg kg^-1 with a mean value of 39.30 mg kg^-1 in soil series of Aeolian Plain while it ranged from 27.23 to 59.75 mg kg^-1 with a mean value of 42.48 mg kg^-1 in soil series of Alluvium Plain. The Sohna soil series of Aravali Hills had 39.60 mg kg^-1 residual Zn. Different Zn fractions followed the order: Res- > CaCO₃- >OM- > Ex- in Aeolian Plain and Alluvial Plain while in Aravali Hills soils order: Res- > CaCO₃- ~ OM- > Ex- was followed. Results reflected that soil properties influence the distribution of different Zn fractions in soils.

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