Abegunde, L., Adedeji, O. & Tope-Ajayi, O. (2015). Land suitabilityanalysis for maize production in Egbeda local governmentarea of Oyo state using GIS techniques. International Journalof Environmental and Ecological Engineering, 9(3).
Adegbite K. A., Okafor, M. E., Adekiya, A. O., Alori, E. T. & Adebiyi,O. T. V. (2019). Characterization and classification of soils ofa toposequence in a derived savanna agroecological zone ofNigeria. Open Agric J. 13: 44-55. DOI:10.2174/1874331501913010044
Ahukaemere, C. M., Ekpr, I. I. & Unachukwu, I. C. (2015). Suitabilityevaluation of soils derived from dissimilar lithologicalmaterials for maize and groundnut production in Owerriagricultural zone, southern Nigeria. Malaysian Journal of SoilScience, 19, 73-82
Ajiboye G. A. & Olaniyan J. O (2016). Characteristics and suitabilityevaluation of the “white soils” of Etung local government areafor oil palm and plantain production. Agrosearch 16(2): 25-40
Bremner, J. M. (1960). Determination of nitrogen in soil by the Kjeldahlmethod. Journal of Agricultural Science. 55: 11-31.
Buol, S. W. & Couto, W. (1981). Soil fertility capability assessment foruse in the humid tropics. In Characterization of soils inrelation to their management for crop production: Examplesfrom the humid tropics, ed. D. J. Greenland, 254–61. London:Clarendon Press.
Chandrakala, M., Srinivasan, R, Anil Kumar, K. S., Sujatha, K., Hegde,R. & Singh, S. K. (2019). Land suitability evaluation formajor crops adapted to the tropical humid region of Kerala,India. International Journal of Chemical Studies 7 (4):2446–53.
FAOSTAT (2012) Food and Agriculture Organization of the UnitedNations Data. Statistical Databases.http://faostat.fao.org/default.aspx?lang=en. Retrieved 20thApril, 2024
Filho, W. L., Wolf, F., Salvia, A. L., Beynaghi, A., Shulla, K., Kovaleva,M. & Vasconcelos, C. R.P. (2020). Heading towards anunsustainable world: some of the implications of notachieving the SDGs. A review. Discover sustainability 1: 2.https://doi.org/10.1007/s43621-020-00002-x
Frank, K., Beegle, D. & Denning, J. (1998). Phosphorus. In: Brown, J.R.(Ed.), Recommended chemical soil test procedures for theNorth Central Region, North Central Regional ResearchPublication No. 221 (revised) Missouri Agric. Exp. Stn.,Columbia, MO, pp. 21-26.
Gee, W. G & Or, D. (2002). Particle-size analysis. In: Methods of SoilAnalysis, Book series: 5. Part 4; Dane, J. and G. C. Topp(Eds.), Soil Science Society of America, USA, p. 255-293.
Idris, A. D., Olaniyan, J. O., Affinnih, K. O. & Ajala, O. N. (2017). Formsand distribution of potassium in red laterite soils of Patigi innorth-central Nigeria. Bulgarian Journal of Soil Science 2(1):42-52
Izuogu, C. U., Orji, J. C., Chinaka, I. C., Ankrumah, E. & Njoku, J.(2023). A REVIEW OF THE Nigerian seed system. SelekcijaI Semenarstvo 29(2). https://doi.org/10.5937/SelSem2302039I
Joshua, J. K., Kunda, J., Anyanwu, N. & Jajere, A. (2013). Landsuitability analysis for agricultural planning using GIS andmulti-criteria decision analysis approach in Greater KaruUrban Area, Nasarawa State, Nigeria.
Liu, R., Pan, Y., Liang, S., Bao, H., Jiang, Y., Tu, H., Nong, J., & Huang,W. (2020). Variations in soil physico-chemical propertiesalong slope position gradient in secondary vegetation of thehilly region, Guilin, Southwest China. Sustainability. 12.1303. 10.3390/su12041303.
Maniyunda, L. M. & Gwari, M. G. (2014). Soil suitability assessment ofHaplustalfs for maize and groundnut in a sub-humidenvironment of Nigeria. International Journal ofDevelopment and Sustainability. ISSN: 2168*8662 –www.isdnet.com/ijds 3(2), 393-403.
Nash, L. N., Blythe, L. J., Cvitanovic, C., Fulton, E. A., Halpern, B. S.,Milner-Gulland, E. J., Addison, P. F. E, Pecl, G. T., Watson,R. A. & Blanchard, J. L. (2020). To achieve a sustainable bluefuture, progress assessments must include interdependenciesbetween the sustainable development goals. One earth 2((2).https://doi.org/10.1016/j.oneear.2020.01.008
Nelson, D.W. & Sommers, L.E. (1992). Total carbon, organic carbon, andorganic matter. In: Page, A. L., Miller, R.H. and Keeney; D.R.(Eds.). Methods of Soil Analysis. Part 2. ASA, Madison, WI,USA, pp. 539-580
Okalebo J. R., Gathua, K. W., & Woomer, P. L. (2000). Laboratorymethods of soil and plant analysis: a working manual.Nairobi: TSBF–KARI–UNESCO.
Olayide, O. E. (2021). Nigeria – land, climate, energy, agriculture anddevelopment: a study in the Sudano-Sahel initiative forregional development, jobs, and food security, ZEF Workingpaper series, NO. 201, University of Bonn, Center forDevelopment Research ((ZEF), Bonn.https://hdl.handle.net/10419/246470
Oyekale, K. O. (2014). Growing an effective seed management system: acase study of Nigeria. Journal of Agricultural andEnvironmental Sciences 3 (2): 345–354.
Pédro, G. (1983). Structuring of some basic pedologicalprocesses. Geoderma, 31: 289–299.
Sanchez, P. A., Palm, C. A. & Buol, S. W. (2003). Fertility capabilityclassification: A tool to assess soil quality in the tropics.Geoderma 114:57–185.
Sanchez, P. A., Water, C., & Buol, S. A. (1982). The fertility capabilitysoil classification system, interpretation, applicability, andmodification. Geoderma 27 (4):283–309. doi:10.1016/0016-7061(82)90019-2.
Senjobi, B. A. & Ogunkunle, O. A. (2010). Effect of land use on soildegradation and soil productivity decline on alfisols andultisols in Ogun state in southwestern Nigeria. AgricultureConspectus Scientificus 75(1): 9-19
Soil Survey Staff. (2017). Soil Survey Manual. Soil Science DivisionStaff. United States Department of Agriculture. HandbookNo. 18. Issued March 2017.
Soil Survey Staff. (2022). Keys to Soil Taxonomy, 13th edition. USDANatural Resources Conservation Service.
Thomas, G. W. (1996). Soil pH and soil acidity. In J. M. Bigham (ed.).Methods of soil analysis: Part 3- chemical methods. SoilScience Society of America Book Series No. 5Soil ScienceSociety of America and American Society of Agronomy,Madison, WI. Pp 475–490.
Walkley, A. & Black, I. A. (1934). Determination of organic matter insoil. Soil Science 37, 549-556 Walkley, A. J., and C. A. Black.1934. An estimation of Deglgare methods for determining soilorganic matter and a proposed modification of the chromicacid titration methods. Soil Science 37 (1):29–38.https://doi.org/10.1097/00010694-193401000-00003
Wambeke, A. (2006). Criteria for classifying tropical soils by age.Journal of Soil Science. 13. 124–132. 10.1111/j.1365-2389.1962.tb00689.x.
Yitbarek, T., Jembere, A. & Kerebeh. H. (2018). Characterization andclassification of soils of Wolkite University research sites,Ethiopia. Eurasian Journal of Soil Science 7:292–99.