Résultats pour Auteur : "Okalebo, John Robert"

Minjingu phosphate rock applications increase the population of phosphate solubilising microorganisms with a positive impact on crop yields in a Kenyan Ferralsol. Ndung'u-Magiroi Keziah Wairimu, Waswa Boaz, Bationo André, Okalebo John Robert, Othieno Calebo O., Herrmann Laetitia, Lesueur Didier. 2015. Nutrient Cycling in Agroecosystems, 102 (1) : 91-99.

Commercial rhizobial inoculants significantly enhance growth and nitrogen fixation of a promiscuous soybean variety in Kenyan soils. Thuita Moses, Pypers Pieter, Herrmann Laetitia, Okalebo John Robert, Othieno Calebo O., Muema Esther, Lesueur Didier. 2012. Biology and Fertility of Soils, 48 (1) : 87-96.

Efficiency of different formulations of Bradyrhizobium japonicum and effect of co-inoculation of Bacillus subtilis with two different strains of Bradyrhizobium japonicum. Atieno Mary, Herrmann Laetitia, Okalebo John Robert, Lesueur Didier. 2012. World Journal of Microbiology and Biotechnology, 28 (7) : 2541-2550.

Occurrence and genetic diversity of phosphate-solubilizing bacteria in soils of differing chemical characteristics in Kenya. Ndung'u-Magiroi Keziah Wairimu, Herrmann Laetitia, Okalebo John Robert, Othieno Calebo O., Pypers Pieter, Lesueur Didier. 2012. Annals of Microbiology, 62 (3) : 897-904.

Do commercial biological and chemical products increase crop yields and economic returns under smallholder farmer conditions? Jefwa Joyce Mnyazi, Pypers Pieter, Jemo M., Thuita Moses, Mutegi Edwin, Laditi M.A., Faye A., Kavoo A., Munyahali Wivine, Herrmann Laetitia, Atieno Mary, Okalebo John Robert, Yusuf Azeez, Ibrahim A., Ndung'u-Magiroi K.W., Asrat A., Muletta D., Ncho C., Kamaa Mary M., Lesueur Didier. 2014. In : Challenges and opportunities for agricultural intensification of the humid highland systems of Sub-Saharan Africa. Vanlauwe Bernard (ed.), VanAsten Piet (ed.), Blomme Guy (ed.). Cham : Springer International Publishing, 81-96. ISBN 978-3-319-07662-1

Population of native PSM increased by Minjingu PR application and positive impact on crop yields in a Kenyan Ferralsol. Ndung'u-Magiroi Keziah Wairimu, Herrmann Laetitia, Okalebo John Robert, Lesueur Didier. 2014. In : PSP5 2014 Facing Phosphorus Scarcity Phosphorus in Soils and Plants. Montpellier : s.n., 74. International Symposium Phosphorus in Soils and Plants. 5, Montpellier, France, 26 Août 2014/29 Août 2014.

Phosphate fertilizers and cereal/legume rotation improve crop yield and total microbial community diversity in soil of Western Kenya. Ndung'u-Magiroi Keziah Wairimu, Wasma Boaz, Bationo André, Pypers Pieter, Okalebo John Robert, Othieno Calebo O., Lesueur Didier. 2011. In : Soil Interfaces in a Changing World 6th ISMOM. INRA. Montpellier : INRA, Résumé, 220. Soil Interfaces in a Changing World - ISMOM 2011, Montpellier, France, 26 Juin 2011/1 Juillet 2011.

Molecular identification of the strains contained in commercial products for improving agriculture in Africa. Herrmann Laetitia, Atieno Mary, Okalebo John Robert, Lesueur Didier. 2010. In : Microbes Stewards of a changing planet : 13th International Symposium on Microbial Ecology (ISME13), Seattle, USA, 22-27 August 2010. ISME. s.l. : s.n., 1 p. International Symposium on Microbial Ecology. 13, Seattle, États-Unis, 22 Août 2010/27 Août 2010.

Occurrence, distribution and genetic diversity of soil Phosphate Solubilizing Bacteria in soils of different chemical characteristics in Kenya. Ndung'u Keziah, Herrmann Laetitia, Okalebo John Robert, Othieno Calebo O., Pypers Pieter, Lesueur Didier. 2010. In : 4th International Symposium on Phosphorus Dynamics in the Soil-Plant Continuum (ISPDSPC), Beijing, China, September 19-23, 2010. s.l. : s.n., Résumé, 1 p. International Symposium on Phosphorus Dynamics in the Soil-Plant Continuum. 4, Pékin, Chine, 19 Septembre 2010/23 Septembre 2010.

Competitiveness and persistence of commercial rhizobial soybean inoculants in central and western Kenya. Thuita Moses, Herrmann Laetitia, Pypers Pieter, Okalebo John Robert, Othieno Calebo O., Lesueur Didier. 2011. . Perth : s.n., Résumé, 1 p. Rhizosphere 3 International Conference, Perth, Australie, 25 Septembre 2011/1 Octobre 2011.

Efficiency of Bradyrhizobium japonicum in different formulations and when co-inoculated with Bacillus subtilis on soybean in a Kenyan soil. Atieno Mary, Herrmann Laetitia, Okalebo John Robert, Lesueur Didier. 2011. . Perth : s.n., Résumé, 1 p. International Conference on Nitrogen Fixation. 17, Perth, Australie, 27 Novembre 2011/1 Décembre 2011.

Field evaluation of a rhizobial inoculant: high nodule occupancy by the strain doesn't lead to improved soybean yields in Kenya. Herrmann Laetitia, Majengo Collins, Mutegi Edwin, Kimanthi Martin, Onyango Paul, Okalebo John Robert, Lesueur Didier. 2011. . Perth : s.n., Résumé, 1 p. International Conference on Nitrogen Fixation. 17, Perth, Australie, 27 Novembre 2011/1 Décembre 2011.

How commercial rhizobial inoculants can contribute to improved livelihoods of resource poor African farmers. Lesueur Didier, Herrmann Laetitia, Thuita Moses, Atieno Mary, Mutegi Edwin, Ndung'u Keziah, Faye Aliou, Kamaa Mary M., Pypers Pieter, Okalebo John Robert. 2011. . Perth : s.n., Résumé, 1 p. International Conference on Nitrogen Fixation. 17, Perth, Australie, 27 Novembre 2011/1 Décembre 2011.

Synergistic effects of commercial biofertilizers with nitrogen fixing, arbuscular mycorrhiza fungi and phosphate solubilizing bacteria on soybean yield. Ndung'u-Magiroi Keziah Wairimu, Faye Aliou, Pypers Pieter, Herrmann Laetitia, Okalebo John Robert, Othieno Calebo O., Lesueur Didier. 2011. . Perth : s.n., Résumé, 1 p. Rhizosphere 3 International Conference 2011, Perth, Australie, 25 Septembre 2011/1 Octobre 2011.

An evaluation of alternative methods of P application for increased maize production under smallholder farmers' conditions in Kenya. Pypers Pieter, Munyahali Wivine, Mutegi Edwin, Musyoki Mary, Mburu Margaret, Okalebo John Robert, Mucheru-Muna Monicah Wanjiku, Lesueur Didier. 2010. In : 4th International Symposium on Phosphorus Dynamics in the Soil-Plant Continuum (ISPDSPC), Beijing, China, September 19-23, 2010. s.l. : s.n., Résumé, 1 p. International Symposium on Phosphorus Dynamics in the Soil-Plant Continuum. 4, Pékin, Chine, 19 Septembre 2010/23 Septembre 2010.