Comparison of the Suitability of Contiguous Fallow-forest Lands for Cassava, Yam, Cocoyam and Sweet Potato Production in Nsukka, Southeastern Nigeria
1. Adesodun, J. K, Adeyemi, E. F., & Oyegoke, C. O. (2007). Distribution of nutrient elements within water-stable aggregates of two tropical agro ecological soils under different land uses. Soil and Tillage Research, 92, 190–197. doi: 10.1016/j.still.2006.03.003
2. Ahmed, H. (2002). Assessment of Spatial Variability of Some Physicochemical Properties of Soils under Different Elevations and Land Use Systems in the Western Slopes of Mount Chilalo, Arsi (Master’s thesis, Alemaya University). Ethiopia.
3. Akamigbo, F. O. R, & Asadu, C. L. A. (2001). The influence of parent materials on the soils of Southeastern Nigeria. East African Agriculture and Forest Journal, 48, 81–91.
4. Akamigbo, F. O. R. (1984). The accuracy of field textures in a humid tropical environment. Soil Survey and Land Evaluation, 4, 63–70.
5. Akamigbo, F. O. R. (1999). Influence of land use on soil properties of the humid tropical agroecology of Southeastern Nigeria. Nigerian Agriculture Journal, Vol. 30, 59–76.
6. Akinrinde, E. A., & Obigbesan, G. O. (2000). Evaluation of fertility status of selected soils for crop production in five ecological areas of Nigeria. In 26th Annual Conference Soil Science (pp. 279–288). Ibadan: n. d.
7. Alexandra, M., Charles, R., Jeangros, B., & Sinaj, S. (2013). Effect of organic fertilizers and reduced-tillage on soil properties, crop nitrogen response and crop yield: Results of a 12-year experiment in Changins, Switzerland. Soil and Tillage Research, 126, 11–18. doi: 10.1016/j.still.2012.07.012
8. Allen, V. B., & Pilbeam, D. J. (Eds.). (2007). Handbook of Plant Nutrition. NW: CRC Press.
9. Aluko, A. P., & Fagbenro, J. A. (2000). The role of tree species and land use systems in organic matter and nutrient availability in degraded Ultisol of Onne, Southeastern Nigeria. In 26th Annual Conference Soil Science (pp. 220–236). Ibadan: n. d.
10. Asadu, C. L. A., & Akamigbo, F. O. R. (1990). Relative contributions of organic matter and clay fractions to cation-exchange capacity (CEC) of soils in Southeastern Nigeria. Samaru: Journal of Agriculture Research, 7, 17–23.
11. Asadu, C. L. A., Nwafor, I. A., & Chibuike, G. U. (2015). Contributions of microorganisms to soil fertility in adjacent forest, fallow and cultivated land use types in Nsukka, Nigeria. International Journal Agriculture & Forestry, 5(3), 199–204. Retrieved from http://article.sapub.org/10.5923.j.ijaf.20150503.04.html
12. Asadu, C. L. A, Obasi, S. C., & Dixon A. G. O. (2010). Variations in soil physical properties in a cleared forestland continuously cultivated for seven years in eastern Nsukka, Nigeria. Communications in Soil Science and Plant Analysis, 41(2), 123–132. doi: 10.1080/00103620903426931
13. Asadu, C. L. A. (1990). A Comparative characterization of two foot-slope soils in Nsukka area of Eastern Nigeria. Soil Science, 150, 527–534.
14. Asadu, C. L. A., & Ekeleman, L. D. (2014). The effects of continuous cropping and fallowing on the chemical properties of an ultisol in Nsukka, Nigeria. Agro-Science, 12(2), 1–28. doi: 10.4314/as.v12i2.4
15. Asadu, C. L. A., Diels, J., & Vanluawe, B. (1997). A comparison of the contributions of clay, silt and organic matter to the effective CEC of soils in sub-Saharan Africa. Soil Science, 162, 785-794. doi: 10.1097/00010694-199711000-00003
16. Asadu, C. L. A., Dixon, A. G. O., & Okechukwu, R. (2002). Comparative evaluation of the contribution of soil physicochemical properties to variations in the yield of four major staple food crops in eastern Nigeria. Soil Tillage Research, 65, 141–155. doi: 10.1016/s0167-1987(01)00276-8
17. Asadu, C. L. A., Obasi, S. C., Dixon, A. G. O., Ugele, N., & Chibuike, G. U. (2013). Soil fertility recovery in cleared forestland cultivated and fallowed for seven years. Journal of Agriculture and Biodiversity Research, 2(5), 110–116. Retrieved from http://onlineresearchjournals.org/JABR/pdf/2013/jul/Asadu%20et%20al..pdf
18. Awotoye, O. O., Ogunkunle, C. O., & Adeniyi, S. A. (2011). Assessment of soil quality under various land use practices in a humid agro-ecological zone of Nigeria. African Journal of Plant Science, 5(10), 565–569. Retrieved from http://www.academicjournals.org/article/article1380095760_Awotoye%20et%20al.pdf
19. Blake, G. R., & Hartge, K. H. (1965). Bulk density . In C. A. Black (Ed.), Methods of Soil Analysis (Part 1, Physical and mineralogical properties, including statistics of measurement and sampling, pp. 363–382). Madison: American Society of Agronomy, Crop Science Society of America : Soil Science Society of America.
20. Brady, N. C., & Weil, R. R. (2010). Elements of the nature and properties of soils. N. J.: Pearson Prentice Hall.
21. Bremner, J. M. (1965). Inorganic forms of nitrogen. Agronomy, 9, 1179–1237.
22. Chapman, H. D. (1965). Cation exchange capacity. In C. A. Black (Ed.), Methods of Soil Analysis (Part 1, Physical and mineralogical properties, including statistics of measurement and sampling, pp. 891–901). Madison: American Society of Agronomy, Crop Science Society of America : Soil Science Society of America.
23. Cronan, C. S., & Grigal, D. F. (1995). Use of Calcium/Aluminum Ratios as Indicators of Stress in Forest Ecosystems. Journal of Environmental Quality, 24(2), 209. doi: 10.2134/jeq1995.00472425002400020002x
24. Donahue, R. L, Miller, R. W., Schickluna, J. C. (1977). Soils: An introduction to soils and plant growth. N. J.: Prentice-Hall.
25. Ezeaku, P. I., Alaci, D. (2008). Analytical situations of land degradation and sustainable management strategies in Africa. Journal of Agriculture & Social Science, 4, 42–52.
26. Ezeaku, P. I., (2011). Sustainable Soil Management and Productivity. Nsukka: Great AP Express Publishers ltd.
27. Food and Agricultural Organization of the United Nation. (1976). A Framework for Land Evaluation. Retrieved from http://www.fao.org/docrep/X5310E/x5310e00.htm
28. Food and Agricultural Organization of the United Nation. (1995). Guidelines for Land Evaluation for Rainfall Agriculture. Retrieved from http://www.fao.org/docrep/003/x6083f/x6083f00.htm
29. Food and Agricultural Organization of the United Nation. (2014). World Reference Base for Soil Resources. Retrieved from http://www.fao.org/3/a-i3794e.pdf
30. Food and Agricultural Organization of the United Nation. (2006). Guidelines for Soil Description (4th ed.). Retrieved from http://www.fao.org/docrep/019/a0541e/a0541e.pdf
31. Food and Agricultural Organization of the United Nation. (2013). FAO STAT. Retrieved July 7, 2016, from http://faostat3.fao.org/home/index.html#DOWNLOAD.
32. Food and Agricultural Organization of the United Nation. (2002). Land and agriculture: A Compendium of recent sustainable development initiatives in the field of agriculture and land management. Retrieved from ftp://ftp.fao.org/agl/agll/docs/landandagric.pdf
33. Food and Agricultural Organization of the United Nation. (2012). FAOSTAT Nigeria. Retrieved March 18, 2016, from http://www.fao.org/faostat/en/#country/159
34. Fetter, C. W. (1994). Applied Hydrogeology. London: Prentice-Hall.
35. Gee, G. W., & Bauder, J. W. (1965). Particle-size analysis. In C. A. Black (Ed.), Methods of Soil Analysis (Part 1, Physical and mineralogical properties, including statistics of measurement and sampling, pp. 383). Madison: American Society of Agronomy, Crop Science Society of America : Soil Science Society of America.
36. The Humanity Development Library. (2016). Tonnia (Xanthosoma spp.) and Taro (Colocasia esculenta). Retrieved from https://goo.gl/YGr8L9
37. Ikeorgu J. E. G. (2003). Effect of size and spacing of minitubers on yield of three selected yam cultivars in the humid tropics of Nigeria. Nigerian Agricultural Journal, 34, 58–62. doi: 10.4314/naj.v34i1.3170
38. Jackson, M. L. (1958). Soil chemistry analysis. London: London Constable.
39. Klute, A., & Dirksen, C. (1965). Hydraulic conductivity and diffusivity. In C. A. Black (Ed.), Methods of Soil Analysis (Part 1, Physical and mineralogical properties, including statistics of measurement and sampling, pp. 694-783). Madison: American Society of Agronomy, Crop Science Society of America : Soil Science Society of America.
40. Landon, J. R. (Ed.). (1984). Booker tropical soil manual: A Handbook for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. London: Booker Agriculture International.
41. Marler, J. B., & Wallin, J. R. (2006). Human health, the nutritional quality of harvested food and sustainable farming. Bellevue: Nutrition Security Institute. Retrieved from http://www.nutritionsecurity.org/PDF/NSI_White%20Paper_Web.pdf
42. Oguike P. C., Mbagwu, J. S. C. (2009). Variations in some physical properties and organic matter content of soils of coastal plain sand under different land use types. World Journal of Agricultural Science, 5(1), 63–69. Retrieved from https://www.idosi.org/wjas/wjas5(1)/9.pdf
43. Oko-ibom, G. O., Asiegbu, J. E., (2006). Growth and yield responses of rainy season field tomatoes to timing and splitting of fertilizer application. Journal of Agriculture, Food, Environment and Extension, 5(1), 17–25. doi: 10.4314/as.v5i1.1540
44. Omotoso, T. I. (1973). Factors guiding the determination of phosphorus fertilizer requirements of cocoa growing soils in Western Nigeria. Retrieved from https://goo.gl/26O2XI
45. Reddy, R. S., Shiva Prasad, C. R. (1999). Characterization and evaluation of potato growing soils of Karnataka. Journal of the Indian Society of Soil Science, 47, 525–532.
46. Rhoades, J. D. (1982). Cation Exchange Capacity. In: A. Page (Ed.), Methods of Soil Analysis (Part 2, Chemical and microbiological properties, 2nd ed., pp. 149-157). Madison: American Society of Agronomy, Crop Science Society of America : Soil Science Society of America.
47. Rhoades, J. D. (1996). Salinity: Electrical conductivity and total dissolved solids. In. D. L. Sparks et al. (Eds.), Methods of Soil Analysis: Chemical Methods (Part 3, pp. 417–435). Madison: ASA, SSSA.
48. Riue, M., Sposito, G. (1991). Fractal fragmentation, soil porosity, and soil water properties: I. Theory. Soil Science Society of America Journal, 55, 1231–1238. doi: 10.2136/sssaj1991.03615995005500050006x
49. Selassie. Y, Anemut and Addisus (2015). The effects of land use types, management practices and slope classes on selected soil physico-chemical properties in Zikre watershed, North-Western Ethiopia. Environmental Systems Research, 4(1). doi: 10.1186/s40068-015-0027-0
50. Styger, E., & Fernandes, E. C. M. (2006). Contributions of managed fallows to soil fertility recovery. In N. Th. Uphoff (Ed.), Biological Approaches to Sustainable Soil Systems (pp. 425–437). Boca Raton: CRC/Taylor&Francis.
51. Sys, C. (1985). Land Evaluation. Brussel: Algemeen Bestuur van de Ontwikkelingssamenwerking.
52. Van Reeuwijk, L. P. (1992). Procedures for soil analysis (, 3rd ed.). Wageningen: International Soil Reference and Information Center.
53. Stroosnijder, L., Sterk, G., & Bewket, W. (2003). Towards Integrated Watershed Management in High land Ethiopia: the Chemoga watershed case study (Doctoral thesis). Retrieved from https://goo.gl/8ZXDOQ54. Yakubu, M., Baraya, S., & Noma, S. S. (2007). Assessment of soil and water quality along river Kadarko in Sanyinna District, Sokoto State. In W. A. Hassan et al. (Eds.), Mobilizing agricultural research towards attaining food security and Industrial growth in Nigeria. Proceedings of the 45th Annual Conference of the Agriculture Society of Nigeria.
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