Quantity and quality of OM greatly influence phytoavailability of Ni by forming complexes and chelates of varying stabilities. Organic amendments could affect distribution and chemical partitioning of Ni in soils thereby altering its phyto-availability. Addition of OM could decrease phytoavailability of Ni by transforming phyto-available forms of Ni to form bound with OM, oxides or carbonates. However, decomposition of OM could release Ni into soil solution thereby increasing its phytoavailability.Due to accumulation of Ni in plant shoots at toxic level, it reduces the photosynthesis in plants. At the end it is concluded that, the application of farmyard manure performed best than compost. Farmyard manure application increased root and shoot fresh weight over that of control, while compost application decreased shoot and root fresh weight and enhance metal uptake in plants.

About the Author

Mr.Aamanat Ali Phd scholar in the University of Agriculture, Faisalabad, Pakistan.I completed my matriculation from Govt. Pilot Secondary School Sharaqpur and F.Sc(Pre-Medical)from Govt. Islamia College Civil Lines, Lahore. I completed my B.Sc(Hons)Agri. and M.Sc(Hons)Agri. in major Soil Science From the University of Agriculture, Faisalabad.

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