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Olk DC, Cassman KG (1993). Reduction of potassium fixation by organic matter invermiculitic soils. Soil Organic Matter Dynamics and Sustainability of TropicalAgriculture, pp. 307-315.Olsen SR, Cole CV, Watanabe FS, Dean LA (1954). Estimation of available phosphorusin soil by extraction with sodium bicarbonate. United States Department ofAgriculture, circular No.939. Govt Printing office, Washington, pp. 1-9.Orozco FH, Cegarra J, Trujillo LM, Roig A (1996). Vermicomposting of coffee pulpusing the earthworm Eisenia fetida: effects on C and N contents and theavailability of nutrients. Biol. Fert. Soils 22: 162-166.Parmelee, R.W. Crossley, D.A. Jr. (1988). Earthworm production and role in the nitrogencycle of a no-tillage agroecosystem on the Georgia piedmont. Pedobiologia, 32(5/6), 355-361.Pashanasi, B. Melendez, G. Szott, L. Lavelle, P. (1992). Effect of inoculation with theendogeic earthworm Pontoscolex corethrurus (Glossocolecidae) on N availability,soil microbial biomass and the growth of 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 of the BaCl 2 -triethanolamine and ammonium acetate methods for determining theexchangeable hydrogen content of 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 of Martiodrilus carimaguensis Jimenez andMoreno in a Colombian savanna Oxisol. Pedobiologia, 43 (6), 557-560.68
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Mekelle UniversityThe School of Gra
Page 3 and 4:
AbstractVermicomposting is the proc
Page 5 and 6:
AcronymsANRS-----------------------
Page 7 and 8:
4.2 DISCUSSIONS ...................
Page 9 and 10:
Chapter 1: Introduction1.1 Backgrou
Page 11 and 12:
ConclusionUSCIRF has and will conti
Page 13 and 14:
Introduction of earthworms to areas
Page 15 and 16:
1.4 General objectiveThe objective
Page 17 and 18: segments of sexually mature individ
Page 19 and 20: scab fungus, spores of which are tr
Page 21 and 22: compaction caused by agricultural t
Page 23 and 24: 2.6 Palatability of the Substrata t
Page 25 and 26: circumstances. As Eisenia foetida t
Page 27 and 28: the field. Lumbricus terrestris is
Page 29 and 30: earthworms were added to soil made
Page 31 and 32: 2.14 Production of Earthworm CastsA
Page 33 and 34: sand, respectively (Borowski, 1995)
Page 35 and 36: A recent study found that earthworm
Page 37 and 38: Chapter 3: Materials and Methods3.1
Page 39 and 40: exchangeable capacity using ammoniu
Page 41 and 42: And the three ingredient equation f
Page 43 and 44: The four-ingredient equation for mo
Page 45 and 46: Without earthwormPredetermined mixW
Page 47 and 48: Chapter 4: Results and Discussions4
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
Page 55 and 56: earthworm dead tissue, nitrogen exc
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
Page 83 and 84: Table 2. Oneway Analysis of Organic
Page 85 and 86: Table 3. Oneway Analysis of Availab
Page 87 and 88: Table 4. Oneway Analysis of Total N
Page 89 and 90: Table 5. Oneway Analysis of CEC (cm
Page 91 and 92: Table 6. Oneway Analysis of Ex. Ca
Page 93 and 94: Table 7. Oneway Analysis of Ex. K (
Page 95 and 96: Table 8. Oneway Analysis of Ex. Mg
Page 97 and 98: Table 9. Oneway Analysis of Ex. Aci
Page 99: 5: Summary of number of Earthworm f
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