Fuente: WIPO "tomato" The disclosure provides compositions and kits comprising i) a biofertilizer comprising a microorganism, wherein the microorganism is Xanthobacter autotrophicus, and ii) a primer of nitrogen fixation, wherein the primer is optionally glucose, fructose, or a combination thereof. In some aspects, disclosed herein are methods of using a biofertilizer and a primer of nitrogen fixation for priming nitrogen fixation, enhancing exopolysaccharides (EPS) production of a biofertilizer, enhancing microbial root colonization of a plant, and/or increasing viability of a biofertilizer.