References
Ahmad R., Jilani G., Arshad M., Zahir Z.A., and Khalid A. 2007. Bio-conversion of organic wastes for their recycling in agriculture: an overview of perspectives and prospects. Annals of Microbiology, 57(4): 471-479.
Allison L.E., and Moodie C.D. 1965. Carbonates. In: Black C.A. (Ed.), Method of Soil Analysis. Part- 3. Agronomy Monogr. No. 9. American Society of Agronomy and Soil Science Society of America, Madison, WI, pp. 1379-1396.
Blouin G. M. and Rindt D. W. 1967. U.S. Patent. No 3,295,950. Washington, DC: U.S. Patent and Trademark Office.
Brown M. E. Hintermann B., and Higgins N. 2009. Markets, climate change, and food security in West Africa. Environmental Science and Technology, 43(21): 8016-8020.
Chien S. H. Prochnow L. I., and Cantarella H. 2009. Recent developments of fertilizer production and use to improve nutrient efficiency and minimize environmental impacts. Advances in Agronomy, 102: 267-322.
Clinton P. W. Newman R. H., and Allen R. B. 1995. Immobilization of 15N in forest litter studied by 15N CPMAS NMR spectroscopy. European Journal of Soil Science, 46(4): 551-556.
Delfine S., Tognetti R., Desiderio E., and Alvino A. 2005. Effect of foliar application of N and humic acids on growth and yield of durum wheat. Agronomy for Sustainable Development, 25(2): 183-191.
Dong L., Córdova-Kreylos A.L., Yang J., Yuan H., and Scow K.M. 2009. Humic acids buffer the effects of urea on soil ammonia oxidizers and potential nitrification. Soil Biology and Biochemistry, 41(8): 1612-1621.
Echeverria S.R., Fernandez M.A.P, Vlaar S., and Finnan T. 2003. Analysis of the legume–rhizobia symbiosis in shrubs from central Western Spain. Applied Journal of Microbiology, 95: 1367–1374.
El-Bana A.Y., and Gomaa M.A. 2000. Effect of N and K fertilization on maize grown in different populations under newly reclaimed sandy soil. Zagazig Agricultural Research, 27(5): 1179-1190.
El-Naggar M.A., and Amer E.A. 1999. The effect of nitrogen fertilizer on some maize cultivars inrelation to the yield and the infestation by Ostrina nubilalis. Minufiya Agricultural Research, 24(3): 937-943.
Emami A. 1996. The Methods of Plant Analysis. Soil and Water Research Institute, Publication No. 982, 128p.
Gee G.W., Bauder J. W., and Klute A. 1986. Particle size analysis. Methods of Soil Analysis. Part-1. Physical and Mineralogical Methods, pp. 383-411.
Gerbens-Leenes P.W., Nonhebel S., and Ivens W.P. 2002. A method to determine land requirements relating to food consumption patterns. Agriculture, Ecosystems and Environment, 90(1): 47-58.
Hanafi M.M., Eltaib S.M., Ahmad M.B., and Syed Omar S.R. 2002. Evaluation of controlled-release compound fertilizers in soil. Communications in Soil Science and Plant Analysis, 33(7-8): 1139-1156.
Heng L.C. 1989. Influence of some humic substances on P-sorption in some Malaysian soils under rubber. Natural Rubber Resources, 4:186-194.
Jie C., Jing-Zhang C., Man-Zhi T., and Zi-tong G. 2002. Soil degradation: a global problem endangering sustainable development. Journal of Geographical Sciences, 12(2): 243-252.
Kononova M.M. 1966. Materia Orgánica del Suelo. Vilassar de Mar. Barcelona, España.
Nelson D.W., and Sommers L.E. 1996. Total carbon, organic carbon and organic matter. In: Sparks D.L. (Ed.), Methods of Soil Analysis. Part-3. Chemical Methods. Soil Science Society of America, Madison, WI, pp. 961-1010.
Peña C.J., Grageda C.O., and Vera N.J. 2001. Nitrogen fertilizer management in Mexico: Use of isotopic techniques (15N). Terra, 20(1): 51-56.
Richards L.A. 1954. Diagnosis and improvement of saline and alkali soils. Soil Science, 78(2): 154.
Samson G., and Visser S.A. 1989. Surface-active effects of humic acids on potato cell membrane properties. Soil Biology and Biochemistry, 21(3): 343-347.
Sarir M.S., and Durrani M.I. 2006. Utilization of natural resources for increase crop production. Journal of Agricultural and Biological Science, 1(2): 16218.
Shaviv A. 2005. Controlled release fertilizers. In: IFA International Workshop on Enhanced-Efficiency Fertilizers. Frankfurt. International Fertilizer Industry Association Paris, France, pp. 28-30.
Tolay I., Erenoglv B., Romheld V., Braon H.J., and Cakmak I. 2001. Phytosiderophore release in Aegilops tauschii and triticumspecies under zinc and iron deficiencies. Journal of Experimental Botany, 52: 1093-1099.
Trenkel M.E. 2010.Slow-and controlled-release and stabilized fertilizers: An option for enhancing nutrient use efficiency in agriculture. International Fertilizer Industry Association.
Wu L., Liu M., and Liang R. 2008. Preparation and properties of a double-coated slow-release NPK compound fertilizer with superabsorbent and water-retention. Bioresource Technology, 99(3): 547-554.
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