References
Awodun, M.A (2007). Effect of Reduced Tillage on Soil Properties and Cowpea Yield in Rainforest Zone of South West Nigeria . Asian Journal of Agricultural Research, 1: 23-26 Belnap, J. (2001). Factors influencing nitrogen fixation and nitrogen relevance in biological soil crusts. In: Biological soil crusts; structure, Functional and management (Behiap, J. and Lange, O.L. Eds). Springer-Verlag Berlin Heidelberg, Germany, 241-484. Bremmer, J.M and C.S Mulvaney (1982). Total Nitrogen determination. In : Methods of Soil analysis part 2 chemical microbiological properties. 2nd edition Agronomy monograph No.9:5 95 – 622. FAO, 2016. FAOSTAT Pulse, Nutritious Seed for a Sustainable Future. Food and Agriculture Organization of the United Nations, Rome, Italy.pg1-12 Gee, G.W. and Or, D. (2002) Particle Size Analysis. In: Dane, J.H. and Topp, G.C., Eds., Methods of Soil Analysis, Part 4, Physical Methods, Soils Science Society of America, Book Series No. 5, Madison, 255-293 Gabasawa, A.I, Mohammed, H., Aliyu, I.A., Abubakar, F.J., Abdullahi, A.A. and Yusuf, A.A., (2014). Groundnut (Arachis hypogaea L.) Root growth as influenced by crop genotype and soil salinity in Sudan agro-ecological zone of Nigeria. Proceedings of the 38th Annual Conference of the Soil Science Society of Nigeria, University of Uyo, Akwa-Ibom State, 10th – 14th March, 2014. Gabasawa, A.I, Yusuf, A.A. and I.A. Aliyu (2012). The effect of applied phosphorus and groundnut (Arachis hypogaea l.) cultivars on the rhizosphere acid and alkaline phosphatase activities. Biological and Environmental Science Journal for the Tropics, 9(4): 1-7. Gabasawa, A.I. (2011). Varietal differences in phosphorus use efficiency and nitrogen fixation in groundnuts at Samaru, Nigeria. Completed MSc Soil Science Research Dissertation. https//:doi.org/10.13140/RG.2.2.32223.18087. Gabasawa, A.I. (2021). Evaluation of selected groundnut genotypes for biological nitrogen fixation and yield in P-deficient soils of the Nigerian savannahs. Completed PhD Soil Science Research Thesis. https//:doi.org/10.13140/RG.2.2.35925.14566. Gabasawa, A.I. and Yusuf, A.A. (2012). Biological nitrogen fixation of some groundnuts as affected by genotype and applied phosphorus at Samaru, northern Guinea savannah of Nigeria. Bayero Journal of Pure and Applied Sciences, 5(2): 132-135. Gabasawa, A.I., Yusuf, A.A., Iwuafor, E.N.O. and Echekwu, C.A. (2018). Symbiotic nitrogen fixation in groundnuts (Arachis hypogaea (L.)) due to phosphorus source on a P-deficient Alfisols in Samaru, Nigeria. Journal of Crop Research, Agroforestry and Environment, 2(10): 22-34. Gabasawa, A.I., Yusuf, A.A., Iwuafor, E.N.O. and Echekwu, C.A. (2016). Prospects for Nitrogen fixation of groundnuts (Arachis hypogaea (L.)) due to phosphorus on a P-deficient Minjibir Alfisol. Proceedings of the 1st Ahmadu Bello University Postgraduate Students’ Conference 2016, Ahmadu Bello University Zaria, Nigeria, 23rd - 24th November, 2016. Jabro, J., Stevens, W. and Iversen, W. (2020) Comparing Two Methods for Measuring Soil Bulk Density and Moisture Content. Open Journal of Soil Science, 10, 233-243. doi: 10.4236/ojss.2020.106012 Kumar, R.M. Reddy, P.S. Sinha, J. Tirkey, M.K. Singh and B.C. Prasad, 2010. Impact of Leguminous Biomulching on Soil Properties, Leaf Yield and Cocoon Productivity of Tropical Tasarculture under Rain-Fed Conditions. Journal of Entomology, 7: 219-226. DOI: 10.3923/je.2010.219.226 Mapfumo, P., Campbell,BM ., Mpepereki, S., and Manfongoya, P. (2001) Legumes in Soil Fertility Management: The case of Pigeonpea in Smallholder Farming System in Zimbabwe. African Crop Science Journal, Vol.( 9). 4, pp. 629-644,ISSN 1021-973012001. Mokwunye, U. (eds) Fighting Poverty in Sub-Saharan Africa: The Multiple Roles of Legumes in Integrated Soil Fertility Management. Springer, Dordrecht. https://doi.org/10.1007/978- 94-007-1536-3_7 Mugendi, D., Waswa, B., Mucheru-Muna, M., Kimetu, J., and Palm, C.. (2011). Comparative Analysis of the Current and Potential Role of Legumes in Integrated Soil Fertility Management in East Africa. In: Bationo, A., Waswa, B., Okeyo, J., Maina, F., Kihara, J., Naab JB, Chimphango SMB, Dakora FD. N2 fixation in cowpea plants grown in farmers’ fields in the Upper West Region of Ghana, measured using 15N natural abundance. Symbiosis. 2009;48:37-46 Obianefo, F. U., Agbana, I.O; and Tanee, F.G.B. (2017). Physiochemical characteristics of soil from selected solid wastes dumpsite in Port Harcourt, Rives State, Nigeria, JASEM.21(6). Olsen S.R and L.E. Sommers (1994). Determination of available phosphorus. In: Methods of soil analysis part 2 Chemical and microbiological properties. Agronomy Monograph. No. 9 (2nd Edition): 403 – 430 Rowell, D.L. (1994). Soil Science: Methods & Applications (1st ed.). Routledge. https://doi.org/10.4324/9781315844855pp pp 79- 84 Stagnari, F., Maggio, A., Galieni, A. et al. Multiple benefits of legumes for agriculture sustainability: an overview. Chem. Biol. Technol. Agric. 4, 2 (2017).https://doi.org/10.1186/s40538-016-0085-1R. Tang, C. (1998) Factors affecting soil acidification under legumes I. Effect of potassium supply. Plant and Soil 199, 275–282 . https://doi.org/10.1023/A:1004361205533- Walkley, A. and I.A Black (1934). An examination of the Degt Jareff Method for determing Soil organic matter and proposed modification of the chromic acid titration method. Soil Sc.37:29-38. Witcombe Alexia M. and Tiemann Lisa K.(2022) Potential Contribution of Groundnut Residues to Soil N and the Influence of Farmer Management in Western Uganda. Frontiers in Sustainable Food Systems(5) URL: https://www.frontiers in.org/articles/10.3389/fsufs.2021.691786 ;DOI: 10.3389/fsufs.2021.691786 ISSN:2571- 581X. Yuvaraj, Muthuraman, Pandiyan, Muthaiyan, Gayathri, Pandurangan. "Role of Legumes in Improving Soil Fertility Status" In Legume Crops: Prospects, Production and Uses, edited by Mirza Hasanuzzaman. London: IntechOpen, 2020. 10.5772/intechopen.93247