Olk DC, Cassman KG (1993). Reduction <strong>of</strong> potassium fixation by organic matter invermiculitic soils. Soil Organic Matter Dynamics and Sustainability <strong>of</strong> TropicalAgriculture, pp. 307-315.Olsen SR, Cole CV, Watanabe FS, Dean LA (1954). Estimation <strong>of</strong> available phosphorusin soil by extraction with sodium bicarbonate. United States Department <strong>of</strong>Agriculture, circular No.939. Govt Printing <strong>of</strong>fice, Washington, pp. 1-9.Orozco FH, Cegarra J, Trujillo LM, Roig A (1996). Vermicomposting <strong>of</strong> c<strong>of</strong>fee pulpusing the earthworm Eisenia fetida: effects on C and N contents and theavailability <strong>of</strong> nutrients. Biol. Fert. Soils 22: 162-166.Parmelee, R.W. Crossley, D.A. Jr. (1988). Earthworm production and role in the nitrogencycle <strong>of</strong> a no-tillage agroecosystem on the Georgia piedmont. Pedobiologia, 32(5/6), 355-361.Pashanasi, B. Melendez, G. Szott, L. Lavelle, P. (1992). Effect <strong>of</strong> inoculation with theendogeic earthworm Pontoscolex corethrurus (Glossocolecidae) on N availability,soil microbial biomass and the growth <strong>of</strong> three tropical fruit tree seedlings in a potexperiment. Soil Biology & Biochemistry, 24 (12), 1655-1659.Peech, M.,R.L. Cowan, and J.H. Baker (1962). A critical study <strong>of</strong> the BaCl 2 -triethanolamine and ammonium acetate methods for determining theexchangeable hydrogen content <strong>of</strong> the soils. Soil Sci. Soc. Amer. Proc. 26: 37-40.Rangel, A., Thomas, R. J., Jimenez, J.J., Decaens, T. (1999). Nitrogen dynamicsassociated with earthworm casts <strong>of</strong> Martiodrilus carimaguensis Jimenez andMoreno in a Colombian savanna Oxisol. Pedobiologia, 43 (6), 557-560.68
Rao S, Subba Rao A, Takkar PN (1996). Changes in different forms <strong>of</strong> K underearthworm activity. National Seminar on Organic Farming and SustainableAgriculture, India, pp. 9-11.Raw, F. (1962). <strong>Studies</strong> <strong>of</strong> earthworm populations in orchards. I. Leaf burial in appleorchards. Ann. Appl. Biol. 50:389-404.Reinecke, A.J. and F.A. Visser. (1980). <strong>The</strong> influence <strong>of</strong> agricultural land use practiceson the population density <strong>of</strong> Allolobophora trapezoides and Eisenia rosea(Oligochaeta) in Southern Africa. In: Dindal, D.L. (ed.). Soil Biology as Relatedto Land Use Practices. EPA Washington, DC. pp. 310-324.Reynolds, J.W., and D.G. Cook. (1993). Supplementum Tertium: A catalogue <strong>of</strong> names,description and type speciment <strong>of</strong> the Oligochaeta, New Brunswick: NewBrunswick Museum Monographic series (Natural Science) No.9.Ruz-Jerez, B.E. Ball, P.R. Tillman, R.W. (1992). Laboratory assessment <strong>of</strong> nutrientrelease from a pasture soil receiving grass or clover residues, in the presence orabsence <strong>of</strong> Lumbricus rubellus or Eisenia fetida. Soil Biology & Biochemistry, 24(12), 1529-1534.Ruz Jerez, E., P.R. Ball and R.W. Tillman. (1988). <strong>The</strong> role <strong>of</strong> earthworms in nitrogenrelease from herbage residues. In: Jenkinson, D.S. and K.A. Smith (eds.).Nitrogen Efficiency in Agricultural Soils. (publisher unknown) pp. 355-370.Santamaria-Romero-S; Ferrera-Cerrato-R; Almaraz-Suarez-JJ; Galvis-Spinola-A; Barois-Boullard-I. 2001. Dynamics and relationships among microorganisms, C-organic69
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Mekelle UniversityThe School of Gra
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AbstractVermicomposting is the proc
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AcronymsANRS-----------------------
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4.2 DISCUSSIONS ...................
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Chapter 1: Introduction1.1 Backgrou
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ConclusionUSCIRF has and will conti
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Introduction of earthworms to areas
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1.4 General objectiveThe objective
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- Page 33 and 34: sand, respectively (Borowski, 1995)
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- Page 45 and 46: Without earthwormPredetermined mixW
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- Page 49 and 50: Figure 2: Effects of C/N ratio on C
- Page 51 and 52: Figure 4: Effects of C/N ratio on C
- Page 53 and 54: 4.2 DiscussionsAddition of earthwor
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- Page 57 and 58: esults were found by Ndegwa and Tho
- Page 59 and 60: is bound in organic matter in a for
- Page 61 and 62: Therefore, developing countries lik
- Page 63 and 64: Bostrom, U. (1986). The effect of s
- Page 65 and 66: Gerard, B.M. and R.K.M. Hay. (1979)
- Page 67: Marinissen, J.C.Y. Dexter, A.R. (19
- Page 71 and 72: Simek, M. and V. Pizl. (1989). The
- Page 73 and 74: www.vermico.comYeates, G.W. (1981).
- Page 75 and 76: 2: Calculated Mass of Ingredients u
- Page 77 and 78: Ingredient % Moisture % Carbon % Ni
- Page 79 and 80: Ingredient % Moisture % Carbon % Ni
- Page 81 and 82: 4: Data analysis using JMP modelTab
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- Page 87 and 88: Table 4. Oneway Analysis of Total N
- Page 89 and 90: Table 5. Oneway Analysis of CEC (cm
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- Page 95 and 96: Table 8. Oneway Analysis of Ex. Mg
- Page 97 and 98: Table 9. Oneway Analysis of Ex. Aci
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