Cakmak, I. and Marschner, H. 1988. Increase in membrane permeability and exudation in roots of zinc deficient plants. Journal of Plant Physiology 132: 356-361.
Cazetta, J. O. and Villela, L. C. V. 2004. Nitrate reductase activity in leaves and stems of tanner grass (Brachiaria radicans Napper). Brazilia Scientia Agricola 61: 640-648.
CIAT. 1983. Annual report. International center for tropical agriculture, Apartado Aereo 6713, Cali, Colombia, South America.
CIAT. 1985. Annual Report. pp. 222–224. International center for tropical agriculture, Apartado Aereo 6713, Cali, Colombia, South America.
Gopalakrishnan, S., Subbarao, G. V., Nakahara, K., Yoshihashi, T., Ito, O., Meada, I., Ono, H. and Yoshida, M. 2007. Nitrification inhibitors from the root tissues of Brachiaria. Journal of Agriculture and Food Chemistry 55: 1385 –1388.
Ishikawa, T, Watanabe, T. and Minami, K. 1999. Possibility of nitrification suppression by a tropical grass. The effect on multiplication of ammonium-oxidizing bacteria and nitrous oxide efflux. Japanese Journal of Soil Science and Plant Nutrition 70: 762-768.
Ishikawa, T., Subbarao, G. V., Ito, O. and Okada, K. 2003. Suppression of nitrification and nitrous oxide emission by the tropical grass Brachiaria humidicola. Plant and Soil 255: 413-419.
Jones, D. L., Hodge, A. and Kuzyakov, Y. 2004. Plant and mycorrhizal regulation of rhizodeposition. New Phytologist 163: 459 – 480.
Kandeler, E. 1993. Bodenbiologische Arbeitsmethoden, Springer- Verlag, Heidelberg, Germany 163-167.
Lata, C., Degrange, V., Raynaud, X., Maron, P. A., Lensi, R. and Abbadie, L. 2004. Grass populations control nitrification in savanna soils. Functional Ecology 18: 605-611.
Liljeroth, E. and Baath, E. 1988. Bacteria and fungi on roots of different barley varieties (Hordeum vulgare L.). Biology and Fertility of Soils. 7: 53– 57.
Mergulhao, A., Burity, H. A., Tabosa, J. N., Figueiredo, M. and Maia, L. C., 2002. Influence of NaCl on Brachiaria humidicola inoculated or not with Glomus etunicatum. Investigacion Agraria Produccion y Proteccion Vegetales 17: 219-227.
Nakamura, T., Kanno, T., Miranda, C., Ohwaki, Y. and Macedo, M. 2005. Characterization of nitrogen utilization by Brachiara grasses in Brazilian savannas, (Cerrados). Soil Science and Plant Nutrition 51: 973-979.
Neumann, G. and Römheld, V. 2000. The release of root exudates as affected by the plant physiological status, In: R. Pinton, Z.Varanini, Z. Nannipieri (eds.) The rhizosphere: biochemistry and organic substances at the soil-plant interface. Marcel Dekker 2000.
Römheld, V. and Marschner, H. 1986. Evidence for a specific uptake system for iron phytosiderophores in roots of grasses. Plant Physiology 80: 175–180.
Souri, M.K. 2008. Characterization of natural and synthetic nitrification inhibitors and their potential use in tomato culture, PhD dissertation, University of Hohenheim, Stuttgart-Germany.
Subbarao, G. V., Ito, O., Wang, H. Y., Nakahara, K., Suenaga, K. and Rondon, M., Rao, I. M., Carlos, L. and Ishitani, M. 2005. Root exudates of Brachiaria humidicola inhibt nitrification characterization and quantification of this unique biological phenomenon. Plant nutrition for food security, human health and environmental protection, pp. 444-445.
Subbarao, G. V., Ito, O., Sahrawat, K., Berry, W. L., Nakahara, K., Ishikawa, T., Watanabe, T., Suenaga, K., Rondon, M. and Rao, I. 2006. Scope and strategies for regulation of nitrification in agricultural systems-challenges and opportunities. Critical Reviews in Plant Sciences 25: 303-335.
Subbarao, G. V., Wang, H. Y., Ito, O., Nakahara, K. and Berry, W. L. 2007a. NH4+ triggers the synthesis and release of biological nitrification inhibition compounds in Brachiaria humidicola roots. Plant and Soil 290: 245-257.
Subbarao, G. V., Rondon, M., Ito, O., Ishikawa, T., Rao, I. M., Nakahara, K., Carlos, L. and Berry, W. L. 2007b. Biological nitrification inhibition (BNI)-is it a widespread phenomenon?. Plant and Soil 294: 5-18.
Subbarao, G. V., Nakahara, K., Ishikawa, T., Ito, O., Ono, H., Kameyama, M., Yoshida, M., Rondon, M., Rao, I. M., Lascano, C. and Ishitani, M. 2007c. Nitrification inhibitor and soil improver and fertilizer containing the same, United States Patent 20070028659. http://www.freepatentsonline.com/20070028659.html. (accessed 5 July 2007).
Subbarao, G. V., Nakahara, K., Ishikawa, T., Yoshihashi, T., Ito, O., Ono, H., Ohnishi-Kameyama, M., Yoshida, M., Kawano, N. and Berry, W. L. 2008. Free fatty acids from the pasture grass Brachiaria humidicola and one of their methyl esters as inhibitors of nitrification. Plant and Soil 313: 89-99.
Sylvester-Bradley, R., Mosquera, D. and Mendez, J. E. 1988. Inhibition of nitrate accumulation in tropical grassland soils: effect of nitrogen fertilization and soil disturbance. Journal of Soil Science 39 : 407–416.
Wang, H. Y., Subbarao, G. V., Ito, O. and Nakahara, K. 2005. Regulation of nitrification inhibitory (NI) activity in the root exudates of Brachiaria humidicola. Plant Nutrition for Food Security, Human Health and Environmental Protection, pp. 478-479, China.
Wenzl, P., Mancilla, L. I., Mayer, J. E., Albert, R. and Idupulapati, M. R. 2003. Simulation infertile acid soils with nutrient solutions: The effects on Brachiaria species. Soil Science Society of American Journal 67: 1457-1469.