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Status and Distribution of Available Micronutrients Along a Toposequence at Bazargaon Plateau, Maharashtra


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1 Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S), India
     

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A study was carried out to determine the status and distribution of extractable micronutrients zinc (Zn), cupper (Cu), iron (Fe) and manganese (Mn) along a toposequence at Nagpur district, Maharashtra. The twelve profile pits were dug along upper, mid and lower slope positions and soil samples taken from identified horizons were subjected to laboratory analysis. The results show that in toposequence-I, pH of soils ranged from 6.8 to 8.7 indicating slightly neutral to moderately alkaline soil reaction. The EC of the soils in toposequence-I varied from 0.14 to 0.34 dSm-1 and in toposequence-II, it varied from 0.10 to 0.46 dSmv indicating low soluble salt content. Organic carbon content in toposequence-I ranged from 3.10 to 18.77 g kg-1 while in toposequence-II, it ranged from 1.55 to 12.77 g kg-1 and gradually decreased with depth. Exchangeable cations followed the order: Ca2+>Mg2+>Na+>K+ in all the pedons of both the toposequences indicating dominance of calcium bearing minerals in the parent material. Cation exchange capacity in toposequence-I varied from 35.6 to 69.0 cmol (p+) kg-1 while in toposequence-II, it varied from 37.8 to 67.2 cmol (p+) kg-1. Base saturation of toposequence-I varied from 91 to 127 per cent while in toposequence-II, it varied from 89 to 105 per cent. The DTPA extractable micronutrients followed the order: Mn2+>Fe2+>Cu2+>Zn2+ in toposequence-I and Fe2+>Cu2+>Mn2+>Zn2+ in toposequence-II. Almost all the soils of both the toposequences were deficient in Zn2+, respectively.

Keywords

Toposequence, Micronutrients, Soil Fertility.
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  • Status and Distribution of Available Micronutrients Along a Toposequence at Bazargaon Plateau, Maharashtra

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Authors

Jaya N. Giri
Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S), India
Nilima S. Sadanshiv
Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S), India
Prajakta M. Metkari
Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (M.S), India

Abstract


A study was carried out to determine the status and distribution of extractable micronutrients zinc (Zn), cupper (Cu), iron (Fe) and manganese (Mn) along a toposequence at Nagpur district, Maharashtra. The twelve profile pits were dug along upper, mid and lower slope positions and soil samples taken from identified horizons were subjected to laboratory analysis. The results show that in toposequence-I, pH of soils ranged from 6.8 to 8.7 indicating slightly neutral to moderately alkaline soil reaction. The EC of the soils in toposequence-I varied from 0.14 to 0.34 dSm-1 and in toposequence-II, it varied from 0.10 to 0.46 dSmv indicating low soluble salt content. Organic carbon content in toposequence-I ranged from 3.10 to 18.77 g kg-1 while in toposequence-II, it ranged from 1.55 to 12.77 g kg-1 and gradually decreased with depth. Exchangeable cations followed the order: Ca2+>Mg2+>Na+>K+ in all the pedons of both the toposequences indicating dominance of calcium bearing minerals in the parent material. Cation exchange capacity in toposequence-I varied from 35.6 to 69.0 cmol (p+) kg-1 while in toposequence-II, it varied from 37.8 to 67.2 cmol (p+) kg-1. Base saturation of toposequence-I varied from 91 to 127 per cent while in toposequence-II, it varied from 89 to 105 per cent. The DTPA extractable micronutrients followed the order: Mn2+>Fe2+>Cu2+>Zn2+ in toposequence-I and Fe2+>Cu2+>Mn2+>Zn2+ in toposequence-II. Almost all the soils of both the toposequences were deficient in Zn2+, respectively.

Keywords


Toposequence, Micronutrients, Soil Fertility.

References