Banziger, O. (1999) Tropical Agriculturist in grain and fruit crop. CTA, Netherlands, 75-76.
 Simonne E.H. (1999) Water melon varieties and nutritional importance. Alabama Cooperative Extension System Bulletin, 11, 1-2.
 Moyin-Jesu, E.I. (2003) Incorporation of agro-industrial biomass and their effects on four successive crops of Amanranthus. Pertanika Journal of Tropical Agricultural Science, 26, 35-40.
 Moyin-Jesu, E.I. (2007) Evaluation of different organic fertilizers on the soil fertility, leaf chemical composition and growth performance of coffee seedlings. African Journal of Science & Technology, 2, 1-6.
 Moyin-Jesu, E.I. (2009) Evaluation of sole and amended organic fertilizers on soil fertility and growth of kola seedlings (Cola acuminate). Pertanika Journal of Tropical Agricultural Science, 32, 17-23.
 Moyin-Jesu, E.I. (2004) Effect of different organic fertilizers on the soil fertility, leaf chemical composition and growth of budded rubber. Pertanika Journal of Tropical Agricultural Science, 24, 91-100.
 Mallick, F. (2005) Neem; The wonder tree. Bulletin Research Foundation for Science Technology and Natural Resource, 4, 1-3.
 Moyin-Jesu, E.I. (2010) Comparative evaluation of modified neem leaf, neem leaf and woodash extracts as pest control in maize (Zea mays L). Emirate Journal of Food and Agricultural, 22, 34-44.
 Soil Survey Staff (1999) Soil Taxonomy. A basis system of soil classification for making and interpreting, soil surveys. USDA Handbook No. 436, Washington DC.
 Crockford, L. and Nowell, R. (1956) Laboratory manual of physical chemistry. John Wiley and Sons, New York, Expts, 31-32, 58-59.
 Walkley, A. and Black, I.A. (1934) An examination of degtajaroff method for determining soil organic matter and a proposed modification of the chromic acid filtration. Soil Science, 37, 29-38.
 AOAC (1970) Official Analytical Chemists, Arlington, Virginia.
 Murphy, J. and Riley, J.P. (1962) A modified single solution method for determination of phosphate in natural waters. Analytical Glumi Acta, 27, 31-36.
 Jackson, M.L. (1958) Soil Chemical Analysis Englewood Cliffs, Pren-tice Hall Inc., New York.
 McLean, E.O. (1965) Aluminum P. 927-932. In: Black, M.C.A., Eds., Method of Soil Analysis Parts, Agronomy 9, American Society of Agronomy, Madison Wisconsin, USA.
 Ogunwale, J.A. and Udo, E.J. (1978) A laboratory manual for soil and plant analysis. Agronomy Department, University of Ibadan, Nigeria, 201-206.
 Bouycous, J. (1951) Hydrometer method for soil particle size analysis. Agronomy Journal, 54, 464-465.
 Gomez, K.A. and Gomez, A.A. (1984) Statistical procedures for Agricultural Research. 2nd Edition, John Willey and Sons, New York.
 Agboola, A. A. and Corey, R.B. (1973) Soil testing N, P, K for maize in the soil derived from metamorphic and igneous rocks of Western State of Nigeria. Journal of West African Science Association, 17, 93-100.
 Sobulo, R.A. and Osiname, O.A. (1981) Soils and fertilizer use in Western Nigeria. Research Bulletin No. 11, I.A.R. & T., University of Ife.
 Moyin-Jesu, E.I. and Atoyosoye, B. (2002) Utilization of Agricultural Wastes for the growth, leaf and soil chemical composition of cocoa seedlings in the nursery. Pertanika Journal of Tropical Agricultural Science, 26, 49-58.
 Folorunso, O. O., Agboola, A. A. and Adeoye, G.O. (2000) Comparative evaluation of three fertilizer models on phosphorus and potassium uptake in maize. Nigerian Journal of Technical Education, 2, 63-70.
 Parker, R.N. (1993) The economic of food production and soil conservation. Journal of Modern African Studies, 2, 112-115.
 Moyin-Jesu, E.I. (2008) Effects of different organic fertilizers on the soil and leaf chemical composition and growth of mango seedlings. Emirates Journal of Food and Agriculture, 20, 31-45.
 Ayelari, O.P and Tijani-Eniola, H. (2009) Influence of density of groundnut on the performance of cassava and groundnut intercropping system. Applied Tropical Agriculture, 14, 9-15.
 Osundare, B. (2008) Effect of increasing maize (Zea mays L) population density in a cassava/maize mixture on major nutrients and performance of cassava (Manihot esculenta L). Nigerian Journal of Soil Science, 18, 60-67.