1. Olabanji OG, Omeje MU, Mohammed I, Ndahi WB, Nkama I. Wheat: In Cereal Crops of Nigeria: Cereals: Principles of production and utilization. (N.U.4, Iden, F.A. Showemimo eds). 2004; 230 –249.
2. Ohiagu CE, Ahmed A, Orakwe FC, Maurya P, Ajayi O, Falaki A, Kaul N. A National Wheat Production Strategy: 1987–1996.Prepared by Cereal Research Programme ,IAR, Amadu Bello University, Zaria., 1987; 67.
3. Levi GR. Sodicity. In: M.E. Sumner eds. Hand Book of Soil Science, CRC Press Boca Raton Florida. 2000; 29-63.
4. Meena D. Organic farming: Scope and importance. Agrobios Newsletter. 2007;6 (4):14.
5. Atafar Z, Mesdaghinia A, Nauri J, Homaee M, Ahmadimoghaddam M, Mahvi AH.. Effect of fertilizer application on soil heavy metal concentration. Environ Monit Assess. 2010; 160:83-89.
6. Dao TH, Unger PW. Agronomic practices in relation to soil amendments and pesticides. In Soil Amendments and Environmental Quality. Rechcigl, J.E., Ed. Lewis Publishers Boca Raton FL. 1995; 427-470.
7. Martine S, Griswold W. Human health effect of heavy metals. Environ. Sci. Technol. Briefs for citizens. 2009; 15:1-6.
8. Pereira MG, Arruda MAZ. Vermicompost as a natural adsorbent material: characterization and potentialities for cadmium adsorption. J Braz Chem Soc. 2003; 14:39-47.
9. Reinecke AJ, Viljoen SA, Saayman RJ. The suitability of Eudrilus eugeniae, Perionyx excavatus and Eisenia fetida (Oligochaeta) for vermicomposting in southern Africa in terms of their temperature requirements. Soil Biol Biochem. 1992; 24 (12):1295-1307.
10. Kaplan O, Yildrim NC, Yildirim N, Cimen M. Toxic elements in animal products and environmental health. Asian J Anim Vet Adv. 2011; 6(3):228-232.
11. Bardos P. Composting of mechanically segregated fractions of municipal solid waste-a review. Falfield, Bristol, SITA Environmental Trust. 2004; 1-143.
12. Muthukumaravel K, Amsath A, Sukumaran M. Vermicomposting of vegetable waste using cow dung. Europ J Chem. 2008; 5:810-813.
13. Kaviraj, Sharma S. Municipal solid wastes management throw vermicomposting employing exotic and local species of earthworm. Biores Technol. 2003; 90:169-173.
14. Bhatacharya SS, Chattopadhyay GN. Transformation of nitrogen during vermicomposting of fly ash. Waste Management Resource. 2004; 22:488-491.
15. Hussain F, Khaliq A, Durrani MJ. Ethnobotanical studies of some plants of Dabargai Hills, Swat. Proceedings of First Training Workshop on Ethnobotany and its application to Conservation. National Harbariun/PASA/PARC. Islamabad Pakistan. 1995; 207-215.
16. Bhartiya DK, Singh K. Heavy metals accumulation from municipal solid wastes with different animal dung through vermicomposting by earthworm Eisenia fetida. World Appl Sci J. 2012; 17:133-139.
17. Nikhil K. Heavy metals in medicinal plants of Jharia coal field area, India. Pollut Res. 2006; 25:1-7.
18. Li-wenfan Z, Ping L, Zhou M, Ping YW. Influences of heavy metals pollution of the environment on the health of sheep. Chinese J Vet Sci Tech. 1995; 25:15-17.
19. Rajaganapathy V, Xavier F, Sreekumar D, Mandal PK. Heavy metal contamination in soil, water and fodder and their presence in livestock and product: a review. J Env Sci Tech. 2011; 4(3):234-249.
20. Kotwal SK, Sharma RK, Srivastava AK. Industrial pollutants and animal health – a review. Indian J Anim Sci. 2005; 75:713-722.
21. Aschner M. Neurotoxic machanism of fish-bone methylmetry. Environ Toxicol Phamacol. 2002;12:101-102.
22. Aycicek M, Kaplan O, Yaman M. Effect of cadmium on germination, seedling growth and metal contents of sunflower (Helianthus annus L.). Asian J Chem. 2008; 20:2663-2672.
23. Mueller M, Anke M. Distribution of cadmium in the food chain (soil-plant-human), of a cadmium exposed area and the health risks of the general population. Sci Total Environ. 1994; 156:151-158.
24. Roels HA, Van Asche FJ, Overstays M, De Groof M, Lauwerys RR, Lison D. Reversibility of microproteinuria in cadmium workers with incipient tubular dysfunction after reduction of exposure. Am J Ind Med. 1997; 31:645-652.
25. Odoh R, Agbaji EB, Kagbu JA, Thomas SA. Heavy metal speciation in agricultural farmland in some selected local government areas of Benue state, Nigeria. Arch Appl Sci Res. 2011; 3(3):560-573.
26. Garg VK, Chand S, Chhillar A, Yadav VK. Growth and reproduction of Eisenia foetida in various animal wastes during vermicomposting. Appl. Ecol. & Environ. Res., Hungary. 2005; 3(2):51-59.
27. Gupta SK, Tewari A, Srivastava R, Murthy RC, Chandra S. Potential of Eisenia foetida for sustainable and efficient vermicomposting of fly ash. Water Air Soil Pollut. 2005; 163:293-302.
28. Garg P, Gupta A, Satya S. Vermicomposting of different types of waste using Eisenia foetida: A comparative study. Biores Technol. 2006; 97:391-395.
29. Bianchina JN. Development of a flowsystem for the determination of Cd in fiel alcohol using vermicompost as bioabsorbent. Talanta. 2009; 78:333-336.
30. Jain S, Singh V. Lightning Paths in Sky Share Similarities with Channel Networks on Earth. EOS, Transactions of the American Geophysical Union 2004; 85(26): doi: 10.1029/2004EO260001. ISSN: 0096-3941.
31. Khan S, Cao Q, Zheng YM, Huang YZ, Zhu YG. Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China. Environ Pollution. 2008; 152:686-692.
32. Zhang MK, Liu ZY Wang H. Use of single extraction methods to predict bioavailability of heavy metals in polluted soils to rice. Communic Soil Sci and Pl Anal. 2010; 41:820-831.
33. Kirpichtchikova TA, Manceau A, Spadini L, Panfili F, Marcus MA Jacquet T. Speciation and solubility of heavy metals in contaminated soil using X-ray microfluorescence, EXAFS spectroscopy, chemical extraction, and thermodynamic modeling. Geochimica et Cosmochimica Acta. 2006; 70:2163-2190,
34. Adriano DC. Trace Elements in Terrestrial Environments: Biogeo-chemistry, Bioavailability and Risks of Metals, Springer, New York, NY, USA, 2nd edition. 2003.
35. Contreras-Ramos SM, Alvarez-Bernal D, Trujillo-Tapia N, Dendooven L. Composting of tannery effluent with cow manure and wheat straw. Biores Technol. 2004; 94:223–228.
36. Brahambhatt A. Vermistabilization of Biosolids. 20 CP Project submitted for the partial fulfilment of the degree of Master in Environmental Engineering; School of Environmental Engineering, Griffith University, Brisbane, June. 2006.
37. Suthar S, Singh S. Vermicomposting of domestic waste by using two epigeic earthworms (Perionyx excavatus and Perionyx sansibaricus). Int J Environ Sci Technol. 2008; 5:99-106.
38. Jordao CP, Nascentes CC, Cecon PR, Fontes RLF, Pereira JL. Heavy metal availability in soil amended with composted urban solid wastes. Environmental Monitoring and Assessment. 2006; 112:309-326.
39. Lee J, Rounce JR, Mackay AD Grace ND. Accumulation of cadmium with time in Romney sheep grazing ryegrass-white clover pasture: Effect of chromium from pasture and soil intake. Aust J Agric Res. 1996; 47:877-894.
40. Suthar S. Vermicomposting potential of Perionyx sansibaricus (Perrier) in different waste materials. Biores Technol. 2007; 98:1231-1237.
41. Hsu MJ, Selvaraj K, Agoramoorthy G. Taiwan’s industrial heavy metal pollution threatens terrestrial biota. Environ Pollut. 2006; 143:327-334
42. Tripathi G, Bhardwaj P. Decompostion of kitchen waste amended with cow manure using an epigeic species (Eisenia fetida) and an anecic species (Lampito mauritii). Biores Technol. 2004; 92:215-218.
43. Sharma S, Pradhan K, Satya S, Vasudevan P. Potentiality of earthworms for waste management and in other uses-a review. J Amer Sci. 2005; 1(1):4-16.
44. Arancon NQ, Edwards CA, Atiyeh R, Metzger JD. Effects of vermicomposts produced from food waste on the growth and yields of greenhouse peppers. Biores Technol. 2004; 93:139-144.
45. Wang K, Qiao Y, Zhang H, Yue S, Li H, Ji X, Liu L. Bioaccumulation of heavy metals in earthworms from ﬁeld contaminated soil in a subtropical area of China. Ecotaxicol and Environ Safety. 2018;148:876-883
46. Ruiz D, Arroyave MP, Molina AM, Barros JF, Gutierrez ME, Zapata PA. Signals of climate variability/change in surface water supply of high-mountain watersheds – case study: Claro River high mountain basin, Los Nevados Natural Park, Andean Central Mountain Range, Colombia. Medellin: World Bank Group and School of Engineering. 2009; 207.
47. Arancon NQ, Edwards CA, Bierman P, Metzger JD, Lee S, Welch C. Effects of vermicomposts on growth and marketable fruits of field-grown tomatoes, peppers and strawberries. Pedobiologia. 2003; 47:731-735.
48. Tatyana TT, Ekaterina Y, Alkhutova. Peculiarities of heavy metals accumulation by the plants of meadow phytocenosis. Open J Soil Sci. 2012; 2:275-281.
49. Kwon YT, Lee CW, Yun JH. Development of vermicast from sludge and powdered oyster shell. J Clean Prod. 2009; 17:708-711.
50. Suthar S, Singh S. Vermicomposting of domestic waste by using two epigeic earthworms (Perionyx excavatus and Perionyx sansibaricus). Int J Environ Sci Technol. 2008; 5:99-106.