Authors : Ngoyi Kalewu Junior; Muya Mukengele Claude; Tshibamba Mukendi John; Landu Ndambo Gaston; Nkongolo Mulambuila Michel; Muyayabantu Mupala Georges

Volume/Issue : Volume 11 - 2026, Issue 4 - April

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DOI : https://doi.org/10.38124/ijisrt/26apr673

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Abstract : The low fertility of tropical ferralsols is a major constraint for soybean (Glycine max L.) and pearl millet (Pennisetum glaucum L.) production in the Democratic Republic of Congo. This study, conducted in the Katanda territory (Kasaï Oriental), aimed to evaluate the effect of commercial biofertilizers (Super Gro, Fertiplus, D.I. Grow Vert) and local organic amendments (bat guano and poultry manure) on the productivity of soybean and millet in monoculture and intercropping. A split-plot experimental design with three replications was used to measure production parameters and agronomic advantages (RYEM, RYIS, AAY). Results show that bat guano (0.93 t/ha) and Super Gro (0.89 t/ha) significantly improved soybean yield compared to the control (0.29 t/ha). In the soybean-millet intercrop, the actual soybean yield reached 1.1 t/ha with Super Gro and bat guano, confirming the agronomic advantage of intercropping. These findings demonstrate that integrating liquid and solid biofertilizers into a soybean-millet system constitutes a sustainable alternative to improve productivity and resilience of agricultural systems on ferralsols.

Keywords : Soybean, Millet, Biofertilizers, Ferralsol, Katanda, Agronomic Advantage.

References :

1. Ayew A. E., Muhoja S. N., Ocwa A., Jeffery D. E., & Tünde K. E. (2026). Role of biostimulants in sustainable soybean (Glycine max L.) production. Sustainable cropping systems and agricultural products for climate-resilient agriculture. Sustainability, 18(2), 636. https://doi.org/10.3390/su18020636
2. Ballo, B., Turquin, L., & N'Gbesso, M. (2018). Effect of bacterial inoculum of strain IRAT-FA 3 of Bradyrhizobium japonicum on the production of three soybean varieties in Côte d'Ivoire. International Journal of Biological and Chemical Sciences, 12(6), 2667–2679. https://doi.org/10.4314/ijbcs.v12i6.16
3. Dhutmal, R. R., Wankhade, M. P., Shinde, D., & Deshmukh, J. D. (2025). Evaluation of liquid bio-fertilizers in enhancing seed yield and quality in soybean variety JS 20-116. International Journal of Research in Agronomy, 8(7), 1080–1083. https://www.doi.org/10.33545/2618060X.2025.v8.i7n.3345
4. Dimande, P., Arrobas, M., & Rodrigues, M. Â. (2023). Under a tropical climate and in sandy soils, bat guano mineralises very quickly, behaving more like a mineral fertiliser than a conventional farmyard manure. Agronomy, 13(5), 1367. https://doi.org/10.3390/agronomy13051367
5. Landor. (2024). Fertiplus Bio: Complete liquid organic fertilizer. Landor AG. Retrieved from https://landor.ch
6. LOUMATEK. (2022). D.I. Grow Vert: Growth-accelerating foliar fertilizer. LOUMATEK. Retrieved from https://loumatek.com
7. Muyayabantu M. G. (2017). Maize cultivation on oxisols in the Democratic Republic of Congo. Course Notes Collection. L'Harmattan, Paris, ISBN: 978-2-343-11074-5, 248 p.
8. Muyayabantu, G. M., Kadiata, B. D., & Nkongolo, K. K. (2013). Evaluation of the effects of integrated soil fertility management on biological efficiency and economic benefits of maize crops intercropped with soybean in DRC. African Journal of Agricultural Research, 8(12), 1501–1515.
9. N'Gbesso, M. F. D. P., Kouamé, C. N., Zohouri, G. P., & Konaté, D. (2013). Final evaluation of yield and phytosanitary parameters of soybean lines in two agroecological zones of savanna in Côte d'Ivoire. International Journal of Biological and Chemical Sciences, 7(2), 574–583. https://doi.org/10.4314/ijbcs.v7i2.14
10. Ngoyi K. J., Muyayabantu M. G., Yalombe N. G., Landu N. G., & Biaya C. A. (2025). Evaluation of maize response to fertilizer application (Super Gro, Poultry manure, N₁₇P₁₇K₁₇ and N₂₀P₂₀K₂₀_foliar) in a cropping system in Mbujimayi (DRC). International Journal of Scientific Research (Revue-IRS), 3(6), 7195–7208. https://doi.org/10.5281/zenodo.18093730
11. Nsimba Nsiku, D., Mbuya Kankolongo, A., Asanzi Mbeyame, C., Risasi Etutu, R., Mumba Djamba, A., & Lukombo Lukeba, J.-C. (2023). Trial of combining mineral fertilizer microdoses with Super Gro on the productivity of the new biofortified maize variety UPN1 in a sandy soil of Kinshasa. Revue Congo Research Papers, 3, 87–107. https://congoresearchpapers.net
12. Pale S., Barro A., Koumbem M., Sere A., & Traore H. (2021). Effects of tillage and organo-mineral fertilization on millet yields in the Sudano-Sahelian zone of Burkina Faso. Int. J. Biol. Chem. Sci., 15(2), 497-510. http://ajol.info/index.php/ijbcs
13. Qiao, M., Sun, R., Wang, Z., Dumack, K., Xie, X., Dai, C., Wang, E., Zhou, J., Bonkowski, M., & Chen, Y. (2024). Legume rhizodeposition promotes nitrogen fixation by soil microbiota under crop diversification. Nature Communications, 15, 2924. https://doi.org/10.1038/s41467-024-47159-x
14. Traore A. C., Kouyate A. B., & Famanta M. (2025). Effects of cropping system, fertilization and calco-magnesian amendment on maize (Zea mays), sorghum (Sorghum bicolor) and groundnut (Arachis hypogaea) in the Sudanian zone of Mali. Afrique SCIENCE, 26(6), 89–107. http://www.afriquescience.net
15. Tshibangu E. B., & Kabamba, C. L. (2023). Response of Glycine max L. to organic matter application based on Tithonia diversifolia on a ferralsol in Mbuji-Mayi/DRC. Journal of Oasis Agriculture and Sustainable Development, 4(2), 21–35. https://doi.org/10.56027/JOASD.042023
16. Yalombe N. G., Ngoyi K. J., Tshinyangu K. A., & Muyayabantu M. G. (2025). Combined effects of fertilization and topping on aluminum acidity and cowpea yield in Tshilenge. International Journal of Scientific Research (Revue-IRS), 3(6), 6648-6659. https://doi.org/10.5281/zenodo.17681559