Assefa K (1978). Effects of humus on water retention capacity of the soil, and its role in fight against desertification. MSc Thesis, Department of Environmental Science, Helsinki University.

Assunta MP, Giacomo G, Sergio L, Stefano D, Piero P (2004). Effect of fire on soil C, N and microbial biomass. INRA, EDP Sciences 2004, France. Agron. Sustain. Dev. 24:47-53.

Barauah TC, Barthakulh HP (1997). A Textbook of Soil Analysis. Viskas Publishing House, New Delhi, India.

Berhanu D (1985). The Vertisols of Ethiopia: their properties, classification and management. In: Fifth Meeting of the Eastern African Sub-Committee for Soil Correlation and Land Evaluation. Wad Medani, Sudan. 5-10 December 1983. World Soil Resources Reports No. 56. FAO (Food and Agriculture Organization), Rome.

Black CA (1965). Methods of Soil Analysis. Part I, American Society of Agronomy, Madison, Wisconsin, USA.

Bouyoucos GJ (1962). Hydrometer method improved for making particle size analysis of soils. Agron. J. 54:464-465.
Crossref

Certini G (2005). Effect of fire on properties of soil. A review. Oecologia 143:1-10.
Crossref

Choromanska U, DeLuca TM (2002). Microbial activity and nitrogen mineralization in forest mineral soils following heating: Evaluation of post-fire effects. Soil Biol. Biochem. 34:263-271.
Crossref

Devis J, Freitans F (1984). Physical and Chemical Methods of Soil and Water Analysis, Food and Agriculture Organization. Soil Bulletin 10. Rome, Italy, pp. 275-289.

Emerson WW (1995). Water retention, organic carbon and soil texture. Aust. J. Soil Res. 33:241-251.
Crossref

Hillel D (1980). Fundamentals of Soil Physics. Harcourt Brace Jovanivich Publisher, Academic Press, Inc. San Diego.

Huffman EL, MacDonald LH, Stednick JD (2001). Strength and persistence of fire-induced soil hydrophobicity under ponderosa and lodgepole pine, Colorado Front Range. Hydrol. Process. 15:2877-2892.
Crossref

Landon JR (Ed.) (1991). Booker Tropical Soil Manual: A Handbook for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. Longman Scientific and Technical, Essex, New York, USA.

Letey J (1969). Measurement of contact angle, water drop penetration time, and critical surface tension. pp. 34-47, In: DeBano LF, Letey J (Eds.). Proceedings of the Symposium on Water Repellent Soils. 6th-10th May 1968, Riverside, CA.

Mulongey K, Merck R (Eds.)(1993). Soil organic matter dynamics and sustainability of tropical agriculture. John Wiley and Sons, Inc., New York.

Oguntunde PG, Fosu M, Ajayi AE, Giesen N (2004). Effects of charcoal production on maize yield, chemical properties and texture of soil. Biol. Fertil. Soils 39:295-299.
Crossref

SAS (Statistical Analysis System) (2004). SAS/STAT user's guide. Proprietary software version 9.00.

Ulery AL, Graham RC (1993). Forest fire effects on soil color and texture. Am. J. Soil Sci. Soc. 57(1):135-140.
Crossref

Wakene N (2001). Assessment of important physicochemical properties of Dystric Udalf (Dystric Nitosols) under different management systems in Bako area, western Ethiopia. MSc Thesis, Alemaya University, Alemaya.