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Relationship of soil potassium forms with maize potassium contents in soils derived from different parent materials

Rashid Mehmood Butt, Mohammad Saleem Akhtar, Ayaz Mehmood, Muhammad Imran, Shah Rukh, Ghashiya Sattar Kayani, Muhammad Tariq Siddique, Kashif Sarfraz Abbasi, Abdul Qayyum, Zahoor Ahmad
  • Rashid Mehmood Butt
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Mohammad Saleem Akhtar
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Ayaz Mehmood
    Department of Agricultural Sciences, University of Haripur, Haripur, Pakistan | ayaz.gill@uoh.edu.pk
  • Muhammad Imran
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Shah Rukh
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Ghashiya Sattar Kayani
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Muhammad Tariq Siddique
    Department of Soil Science & SWC, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Kashif Sarfraz Abbasi
    Department of Food Technology, Pir Mehr Ali Shah-Arid Agriculture University, Rawalpindi, Pakistan
  • Abdul Qayyum
    Department of Agricultural Sciences, University of Haripur, Haripur, Pakistan
  • Zahoor Ahmad
    Department of Agricultural Sciences, University of Haripur, Haripur, Pakistan; Department of Agriculture and Biological Engineering, University of Florida, Gainesville, FL, United States

Abstract

Understanding of soil potassium (K) dynamics is essential for sustainable crop production. Bioavailability of K depends on forms and distribution within the soil profile. The objectives of this research were to determine which soil K forms control the maize (Zea mays) K contents and compare the extracting capability of sodium tetraphenylborate (NaTPB) with ammonium acetate (NH4OAc) method. Nine soils representing three different parent materials, i.e. loess, sandstone and shale were sampled at three surface genetic horizons. Within each parent material, three soils at varying level of development were selected. Besides basic soil parameters, K was fractioned into water soluble K, exchangeable K, non-exchangeable K, and NaTPB-extracted K. The maize was sown in pots having 2 kg soil from each genetic horizon. Crop was harvested at seven weeks and plant was analysed for K contents. Results show that NaTPB-extracted K gave best correlation as compared to NH4OAc method. This conveys that a non-exchangeable K portion that becomes available to plants can be better estimated by NaTPB method than NH4OAc extraction.

Keywords

Potassium forms; Potassium availability; Parent material; Soil genesis; Maize

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Submitted: 2016-08-03 21:47:55
Published: 2017-06-23 14:19:59
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Copyright (c) 2017 Ayaz Mehmood, Rashid Mehmood Butt, Mohammad Saleem Akhtar, Muhammad Imran, Shah Rukh, Ghashiya Sattar Kayani, Muhammad Tariq Siddique, Kashif Sarfraz Abbasi, Abdul Qayyum, Zahoor Ahmed

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