| [1] |
Gehlot Y, Aakash RG, Bangar KS, Kirar SK. 2019. Nature of soil reaction and status of EC, OC and macro nutrients in Ujjain Tehsil of Madhya Pradesh. International Journal of Chemical Studies 7(6):1323−26 |
| [2] |
Ausari DK, Singh B, Aakash, Kumawat R, Gehlot Y. 2020. GIS based mapping of soil fertility status of Teshil Jobat, District Alirajpur, Madhya Pradesh, India. International Journal of Current Micorbiology and Applied Sciences 9(10):60−69 doi: 10.20546/ijcmas.2020.910.009 |
| [3] |
Atofarati SO, Ewulo BS, Ojeniyi SO. 2012. Characterization and classification of soils of two toposequence at Ile-Oluji, Ondo State, Nigeria. International Journal of Agricultural Science 2(7):642−50 |
| [4] |
Chukwu GO, Madu TU, Chinaka EC, Anyegbunam NK. 2013. Pedologists’ apporaoch to agro-technology transfer: A case study of Ikwuano, Abia State, Nigeria. African Journal of Agricultural Research 8(2):148−52 |
| [5] |
Ofem KI, Abam PO, Ediene VF, Aki EE, Afu SM, et al. 2023. Fertility implication of clay minerals in soils of three limestone geologic formations in southeastern Nigeria. Arabian Journal of Geosciences 16:636 doi: 10.1007/s12517-023-11736-z |
| [6] |
Brady NC, Weil RR. 2004. The nature and properties of soils. 13th Edition. New Jersey: Pearson Education. |
| [7] |
Ali A, Esayas A, Beyene S. 2010. Characterization of soils of Delbo Wegene watershed woliyta zone, Southern Ethiopia for planting appropriate land management. Journal of Soil Science and Environmental Management 1(8):184−99 |
| [8] |
Dessalegn D, Beyene S, Ram N, Walley F, Gala TS. 2014. Effects of topography and land use on soil characteristics along the toposequence of Ele watershed in southern Ethiopia. CATENA 115:47−54 doi: 10.1016/j.catena.2013.11.007 |
| [9] |
Andrews SS, Karlen DL, Cambardella CA. 2004. The soil management assessment framework. Soil Science Society of America Journal 68(6):1945−62 doi: 10.2136/sssaj2004.1945 |
| [10] |
Jenny H. 1994. Factors of soil formation: A system of quantitative pedology. New York: Dover publication Inc. |
| [11] |
Orewere E, Owonubi A. 2022. Assessment of micronutrient status in soils derived from three parent materials on the Jos Plateau, Nigeria. UMYU Scientifica 1(1):84−90 doi: 10.56919/usci.1122.012 |
| [12] |
Ekwueme BN. 2004. Field geology and geological map production and interpretation. Calabar: Bachudo Science Ltd. pp. 142. |
| [13] |
Ibanga IJ. 2006. Soil studies: The pedological approach. Calabar: MEASOT Printing and Computers. 143 pp. |
| [14] |
Salako FK, Tian G, Kirchhof G, Akinbola GE. 2006. Soil particles in agricultural landscapes of a derived savanna in Southwestern Nigeria and implications for selected soil properties. Geoderma 137(1):90−99 doi: 10.1016/j.geoderma.2006.06.017 |
| [15] |
Oriola E, Bamidele I. 2012. Impact of cropping systems on soil properties in derived savanna ecological zone of Kwara State, Nigeria. Confluence Journal of Environmental Studies 7:34−41 |
| [16] |
Onweremadu EU. 2008. Hydrophobicity of soils formed from different lithologies. Malay. Journal of Soil Science 12:19−30 |
| [17] |
Irmak S, Surucu AK, Aydogdu IH. 2007. Effects of different parent material on the mineral characteristics of soils in the arid region of Turkey. Pakistan Journal of Biological Sciences 10:528−36 doi: 10.3923/pjbs.2007.528.536 |
| [18] |
Okamkpa JR, Okonkwo CA, Udejiofor EC, Amoke IA, Aganigbo CI. 2018. Groundwater exploration in parts of Enugu East Local Government Area, Enugu State, Nigeria. Journal of Natural Sciences Research 8(18):32−42 |
| [19] |
Umeugokwe CP, Ajoagu GM, Asadu CLA. 2022. Characterization, classification and suitability evaluation of soils on three geological formations in Nsukka Area of Enugu State for pepper production. Nigerian Journal of Soil Science 32(2):95−104 |
| [20] |
Akamigbo FOR, Asadu CLA. 1983. Influence of parent material on soils of Southeastern Nigeria. East African Agricultural and Forestry Journal 48:81−91 doi: 10.1080/00128325.1982.11663106 |
| [21] |
Ezeaku PI, Eze FU, Oku EJ. 2015. Profile distribution and degradation of soil properties of an Ultisol in Nsukka semi-humid area of Nigeria. African Journal of Agricultural Research 10(11):1306−11 |
| [22] |
Lal R. 2015. Restoring soil quality to mitigate soil degradation. Sustainability 7:5875−95 doi: 10.3390/su7055875 |
| [23] |
Asadu CLA. 2002. Fluctuations in the characteristics of an important short tropical season August break in Eastern Nigeria. Dis covery and Innovations 14:92−100 |
| [24] |
Ezeaku PI, Iwuanyanwu FC. 2013. Degradation rates of soil chemical fertility as influenced by topography in Southeastern Nigeria. Journal of Environmental Science, Toxicology and Food Technology 6(6):39−49 doi: 10.9790/2402-0663949 |
| [25] |
Food and Agriculture Organization (FAO). 2006. Guidelines for soil description. 4th Edition. Rome: FAO. pp. 97−109. www.fao.org/4/a0541e/a0541e.pdf |
| [26] |
Gee GW, Bauder JW. 1986. Particle-size analysis. In Methods of soil analysis, Part 1 Physical and Mineralogical Methods, Agronomy Monograph No. 9, ed. Klute A. 2nd Edition. Madison, WI: American Society of Agronomy, Soil Science Society of America. pp 383−411. https://doi.org/10.2136/sssabookser5.1.2ed.c15 |
| [27] |
Grossman RB, Reinsch TG. 2002. The solid phase, bulk density and linear extensibility. Methods of Soil Analysis: Part 4 Physical Methods, eds. Dane JH, Topp GC. USA: Soil Science Society of America. pp. 201−28. https://doi.org/10.2136/sssabookser5.4.c9 |
| [28] |
McWhorter DB, Sunada DK. 1977. Ground-water hydrology and hydraulics. Highlands Ranch, Colorado: Water Resources Publication. |
| [29] |
Danielson RE, Sutherland PL. 1986. Porosity. In Methods of Soil Analysis: Part 1 Physical and Mineralogical Methods, ed. Klute A. 2nd Edition. Madison, WI, USA: the American Society of Agronomy, Soil Science Society of America. pp. 443−61. https://doi.org/10.2136/sssabookser5.1.2ed.c18 |
| [30] |
Nelson DW, Sommers LE. 1982. Total carbon, organic carbon, and organic matter. In Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, Agronomy Monographs 9, ed. Page AL. Madison, WI, USA: the American Society of Agronomy, Soil Science Society of America. pp. 539−79. https://doi.org/10.2134/agronmonogr9.2.2ed.c29 |
| [31] |
Udo EJ, Ibia TO, Ogunwale JA, Ano AO, Esu IE. 2009. Manual of soil, plant and water analysis. Lagos: Sibon Books Limited. pp. 4−8. |
| [32] |
Olsen SR, Sommers LE. 1982. Phosphorus. In Methods of Soil Analysis: Part 2 Chemical and Microbiological Properties, Agronomy Monographs 9, ed. Page AL. Madison, WI, USA: the American Society of Agronomy, Soil Science Society of America. pp. 403−30. https://doi.org/10.2134/agronmonogr9.2.2ed.c24 |
| [33] |
Summer ME, Miller WP. 1996. Cation exchange capacity and exchange coefficients. In Methods of Soil Analysis Part 3: Chemical Methods, SSSA Book Series 5, ed. Sparks DL. Madison, Wisconsin: Soil Science Society of America. pp. 1201−30. |
| [34] |
Hendershot WH, Lalande H, Duquette M. 2008. Soil reaction and exchangeable acidity. In Soil Sampling and Methods of Analysis, ed. Carter MR, Gregorich EG. FL, USA: CRC Press. pp. 173−78. https://doi.org/10.1201/9781420005271.ch16 |
| [35] |
Wilding LP, Bouma J, Goss DW. 1994. Impact of spatial variability on interpretive modeling. Quantitative Modeling of Soil Forming Processes 39:61−75 doi: 10.2136/sssaspecpub39.c4 |
| [36] |
Hailu AH, Kibret K, Gebrekidan H. 2015. Characterization and classification of soils of Kabe sub watershed in South Wollo zone, Northern Ethiopia. African Journal of Soil Science 3(7):134−46 |
| [37] |
Brady NC, Weil RR. 2006. Elements of the nature and properties of soils. New York: Prentice Hall Inc. pp. 95. |
| [38] |
Malgwi WB, Ojanuga AG, Chude VO, Kparmwang T, Raji BA. 2000. Morphological and physical properties of some soils at Samaru, Zaria, Nigeria. Nigerian Journal of Soil Research 1:58−64 |
| [39] |
Idoga S, Abagyeh SO, Agber PI. 2005. Characteristics and classification of crop production potentials of soils of the Aliade plain, Benue State, Nigeria. Journal of Soil Science 15:101−10 |
| [40] |
Simon A, Wilhelmy M, Klosterhuber R, Cocuzza E, Geitner C, et al. 2021. A system for classifying subsolum geological substrates as a basis for describing soil formation. CATENA 198:105026 doi: 10.1016/j.catena.2020.105026 |
| [41] |
Soil Quality Institute. 1998. Soil quality test kit guide. USA: Soil Quality Institute, National Resources Conservation Service, United States Department of Agriculture. pp. 82. |
| [42] |
Nwaoba OW, Adesemuyi EA, Okonkwo EI. 2021. Properties and classification of soils developed under two contrasting parent materials in South East Nigeria. International Journal of Agriculture and Rural Development 24(2):5894−904 |
| [43] |
Hallaq AH. 2010. The impact of soil texture on nitrates leaching into groundwater in the North Governorate, Gaza Strip. Journal of the Social Sciences 38(2):11−35 |
| [44] |
Igwe CA, Udegbunam ON. 2008. Soil properties influencing water-dispersible clay and silt in an Ultisol in southern Nigeria. International Agrophysics 22(4):319−25. |
| [45] |
Landon JR. 1991. Booker tropical soil manual: A handbook for soil survey and agricultural land evaluation in the tropics and subtropics. 1st Edition. London: Routledge. https://doi.org/10.4324/9781315846842 |
| [46] |
Oshunsanya S. (Ed. ). 2019. Soil pH for nutrient availability and crop performance. IntechOpen. https://doi.org/10.5772/68057 |
| [47] |
Matus FJ. 2021. Fine silt and clay content is the main factor defining maximal C and N accumulations in soils: a meta-analysis. Scientific Reports 11:6438 doi: 10.1038/s41598-021-84821-6 |
| [48] |
Lawal BA, Tsado PA, Eze PC, Idefoh KK, Zaki AA, et al. 2014. Effect of slope positions on some properties of soils under a Tectona grandis plantation in Minna, Southern Guinea Savanna of Nigeria. International Journal of Research in Agriculture and Forestry 1(2):37−43 |
| [49] |
Afu SM, Isong IA, Awaogu CE. 2019. Agricultural potentials of floodplain soils with contrasting parent material in Cross River State, Nigeria. Global Journal of Pure and Applied Sciences 25:13−22 doi: 10.4314/gjpas.v25i1.3 |
| [50] |
Nwachukwu OI, Olim DM, Afu SM, Akpa EA, Adie PI. 2021. Comparative effect of organic amendments on heavy metals adsorption in soils and their chemical properties. Asian Journal of Applied Sciences 9:59−65 doi: 10.24203/ajas.v9i1.6558 |
| [51] |
Meysner T, Szajdak L, Kus J. 2006. Impact of the farming systems on the content of biologically active substances and the forms of nitrogen in the soils. Agronomy Research 4(2):531−42 |
| [52] |
Harman B. 2017. The major role of phosphorus in plant growth and productivity. IFA Cooperator Magazine 83(2):00 |
| [53] |
Adegbite KA, Okafor ME, Adekiya AO, Alori ET. Adebiyi OTV. 2019. Characterization and classification of soils of a toposequence in a Derived Savannah Agroecological Zone of Nigeria. The Open Agriculture Journal 13(1):44−50 doi: 10.2174/1874331501913010044 |
| [54] |
Orimoloye JR, Gheghere EJ, Aliku O, Nkwocha HU. 2018. The effect of parent material and physiography on selected soil chemical properties in Ibadan, southwestern Nigeria. Proceedings of the 42nd Annual Conference of the Soil Science Society of Nigeria (SSSN), Ibadan, 2018. pp. 138−50. |
| [55] |
Okebalama CB, Igwe CA, Onunwa AO. 2022. Enumeration of carbon and nitrogen contents of water-stable aggregates in layers of topsoils from cultivated and adjacent bush-fallow loamy soils. Agro-Science 21(1):103−13 doi: 10.4314/as.v21i1.16 |
| [56] |
Chikezie IA, Eswaran H, Asawalam DO, Ano AO. 2010. Characterization of two benchmark soils of contrasting parent materials in Abia State, southeastern Nigeria. Global Journal of Pure and Applied Sciences 16(1):23−29 doi: 10.4314/gjpas.v16i1.66190 |
| [57] |
Ndukwu BN, Chukwuma MC, Idigbor CM, Obasi SN. 2012. Forms and distribution of potassium in soils underlain by three lithologies in southeastern, Nigeria. International Journal of Agriculture and Rural Development 15(2):1104−8 |
| [58] |
Ukabiala ME, Ezeaku PI, Kolo J, Umeugokwe CP, Okenmuo FC. 2022. Characterization, classification, and suitability evaluation of soils formed in fluvial deposits within eastern part of Kogi State in Nigeria for rice and maize production. Agro-Science 21(2):100−10 doi: 10.4314/as.v21i2.12 |