CHEMICAL COMPOSITION AND PEDOGENESIS OF SOILS OF AGRICULTURAL COLLEGE FARM, NAIRA, ANDHRA PRADESH
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Authors
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P. GURUMURTHY
Department of Soil Science and Agricultural Chemistry, Agricultural College,Acharya N.G. Ranga Agricultural University, Naira- 532 185
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T. SREELATHA
Department of Soil Science and Agricultural Chemistry, Agricultural College,Acharya N.G. Ranga Agricultural University, Naira- 532 185
Keywords:
Elemental composition, Molar ratios, Pedogenesis, Weathering indicesAbstract
The study on elemental composition and pedogenesis of soils of Agricultural College farm, Naira of Srikakulam district was carried-out during 2021. The soils were developed from granite-gneiss parent material. Total silica (SiO2) content of soils ranged from 50.5 to 74.6 percentage. Silica content in general decreased with soil depth, while sesquioxides (R2O3), alumina (Al2O3), iron oxide (Fe2O3), CaO, K2O, Na2O, MnO were found increasing with depth. High silica/ sesquioxide ratio of soils indicated siliceous nature of soils. The aluminum oxide content of the profiles varied from 15.80% to 26.25%. Highest value was reported in lowland profile, whereas, the lowest value was recorded in rainfed upland profile. Iron oxide content varied from 5.04% to 8.50%. Iron oxide content showed slight variation within profiles. Among the other oxides, CaO > MgO > K2O > Na2O was of the order as the soils were developed under semi-arid climate, wherein, basic cations have accumulated in these soil profiles due to limited leaching. The molar concentration of silica (SiO2) ranged from 0.841 to 1.24 moles, and molar concentration of sesquioxide ranged from 0.191 to 0.313 moles. The molar ratio of SiO2 / R2O3 varied from 2.68 to 6.51 in different soil profiles. The SiO2 / Al2O3 ratio varied from 3.33 to 8.02. These wider molar ratios indicated salacious nature of parent material and due to dominance of silica among chemical fractions. Midland (P3) and lowland (P4) soil profiles showed silt/clay ratio of less than 0.45 and upland profiles showed more than 0.45 indicating relatively advanced weathering in mid and lowland profiles while it was moderate weathering in upland profiles. The Weathering Index of Parker (WIP) values of the soils of study area ranged between 2.8 and 32.4. The lower WIP values (2.8 to 8.1) were associated with rainfed uplands and higher values of 14.7- 32.4 with irrigated low lands. The PIA values ranged from 67 to 97 tend to decrease with the depth in all profiles. The profiles examined have the CIA values varied from 66 to 95 indicating high to intense weathering. The CIA values decreased with depth in all the profiles. The surface horizons of P1 and P2 soil profiles were classified as moderately weathered. On the other hand, all subsurface horizons of these two profiles were highly weathered. However, in profiles P3 and P4 the CIA values ranged between 68 to 90 indicating that these soils were highly weathered. CIW values closely followed the trend of CIA values. The bases/R2O3 values of all profiles ranged from 0.061 to 0.608 and found increased with soil depth in all the profiles. Relatively higher values of bases/R2O3 were found in P4 (low lands) indicating base rich character. Middle land and lowland black soil profiles showed silt/clay ratio of less than 0.45 and upland profiles showed morethan 0.45 indicating relatively advanced weathering in mid and lowland profiles while moderate weathering in upland profiles.
References
1. AIS&LUS. 1970. Soil Survey Manual, All India Soil
2. and Land Use Survey, IARI, New Delhi. pp.1-
3. Birkeland, P.W. 1999. Soils and Geomorphology,
4. Third Edition. New York, Oxford University
5. Press. pp 430-435.
6. Dengiz,O Saðlam, M., Özaytekin, H.H and Baskan,
7. O. 2018. Weathering rates and some
8. physico-chemical characteristics of soils
9. developed on a calcic toposequences.
10. Carpathian Journal of Earth and
11. Environmental Sciences. 8(2): 13–24.
12. Dengiz,O and Usul, M. 2017. Multi-criteria
13. approach in land evaluation studies.
14. Eurasian Journal of Soil Science. 7(1): 20-
15. Fedo, C.M., Nesbitt, H.W and Young, G.M. 1995.
16. Unraveling the effects of potassium
17. metasomatism in sedimentary rocks and
18. paleosols with implications for
19. paleoweathering conditions and provenance.
20. Geology. 23 (10): 921–924.
21. Harnois, L. 1988. The CIW index: A new chemical
22. index of weathering. Sedimentary Geology.
23. (3-4) : 319-322.
24. Hesse, P. R. 1971. A Text Book of Soil Chemical
25. Analysis. John Murry Ltd., London. pp.71-
26. Himabindu, K 2018. Taxonomic studies of soils of
27. Thotapalli ayacut area of North coastal
28. Andhra Pradesh. M.Sc thesis submitted to
29. Acharya N.G. Ranga Agricultural University,
30. Guntur.
31. Himabindu, K and Gurumurthy, P. 2019. Elemental DOI: https://doi.org/10.1287/754bd7b2-131f-44eb-aa89-98b4099a2c0c
32. composition and molar ratios of soils of
33. Thotapalli ayacut area of north coastal
34. Andhra Pradesh. The Journal of Research
35. ANGRAU. 46(4): 17-24.
36. ISSS. 2016. Fundamentals of Soil Science. Indian
37. Society of Soil Science. pp. 209-210.
38. Jackson, M. L. 1973. Soil Chemical Analysis.
39. Oxford IBH Publishing Company, Bombay.
40. pp. 58-75.
41. Nesbitt, Y.W., Young, G. M. 1982. Early proterozoic
42. climates and plate motions inferred from
43. major element chemistry of lutites. Nature.
44. : 715-717.
45. Nwokocha, C.C., Akamigbo, F.R. and Chukwu,
46. G.O. 2003. Characterization and evaluation
47. of soils of Umuahia locala area of Abia Sate
48. for agricultural production. In: Ojeniyi et al.,
49. (Edited), Land degradation, Agricultural
50. Productivity and Rural Poverty:
51. Environmental Implications. Proceedings of
52. the 28th Annual Conference of SSSN 4- 7th
53. Nov, 2003, Umudike, Nigeria. pp. 308-315.
54. Ozaytekin, H.H., Mutlu, H.H and Dedeoglu, M.
55. Soil formation on a calcic
56. chronosequence of ancient Lake Konya in
57. Central Anatolia, Turkey. Journal of African
58. Earth Science. 76: 66-74.
59. Parker, A. 1970. An index of weathering for silicate DOI: https://doi.org/10.1017/S0016756800058581
60. rocks. Geological Magazine. 107(6): 501-
61. Prabhavathi, K., Dasog, G.S., Sahrawat, K.L.,
62. Patil, P.L and Wani, S.P. 2017.
63. Characterization, and classification of soils
64. from three agro-climatic zones of Belgavi
65. district, Karnataka. Journal of the Indian
66. Society of Soil Science. 65 (1): 1-9.
67. Price, J.R and Velbel, M.A. 2003. Chemical
68. weathering indices applied to weathering
69. profiles developed on heterogeneous felsic
70. metamorphic parent rocks. Chemical
71. Geology. 202(3-4): 397-416.
72. Ramprakash, T and Seshagirirao, M. 2012.
73. Characterization and classification of some
74. soils in a part of Krishna district, Andhra
75. Pradesh. The Andhra Agricultural Journal.
76. (3&4): 228-236.
77. Shan, H.M., Liang, H.C., Peng, S.X., Longe, A.A
78. and Zhou, A.G. 2015. Effects of watersaturation
79. and water-loss processes on
80. composition and structure variations of
81. landslide, Three Gorges reservoir, China. In:
82. Water- Rock Interaction. Birkle, P., Torres-
83. Alvarado, I. S. (Eds.). CRC Press, New York,
84. USA. pp. 921-924.
85. Sharma, R.P., Raja, P and Bhaskar, B.P. 2020
86. Pedogenesis and minerology of alluvial soils
87. from suthern part of Rajashtan in Aravalli
88. range, India. Journal Geological Society of
89. India. 95: 59-66.
90. Sreedharreddy, K and Naidu, M.V.S. 2016.
91. Characterization and classification of soils
92. in semi-arid region of Chennur mandal in
93. Kadapa district, Andhra Pradesh. Journal of
94. the Indian Society of Soil Science. 64 (3):
95. -217.
96. Tulay, T., Oran, D., Ilhami, B., Seref, K and Oguz,
97. B. 2019. Chemical weathering indices
98. applied to soils developed on old lake
99. sediments in semi-arid region of Turkey.
100. Eurasian Journal of Soil Science. 8 (1) 60-
101. Vogt, T. 1927. Sulitjelmafeltets geologiog petrografi
102. Norges Geologiske Undersokelse (In
103. Norwegian, with English Abstract) 121: 1-56.
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