TY - JOUR AU - Mangual Crespo, Gerardo AU - Kluson, Robert AU - Schröder, Eduardo C. PY - 1987/01/01 Y2 - 2024/03/29 TI - Nitrogen levels and Rhizobium inoculation and yields of native white bean (Phaseolus vulgaris L.) JF - The Journal of Agriculture of the University of Puerto Rico JA - JAUPR VL - 71 IS - 1 SE - Articles DO - 10.46429/jaupr.v71i1.6918 UR - https://revistas.upr.edu/index.php/jaupr/article/view/6918 SP - 1-6 AB - The combined effect of N fertilization and <em>Rhizobium inoculation</em> on bean (<em>Phaseolus vulgaris</em> L., cv. Bonita) nodulation and yield was studied in the semi-arid southern region of Puerto Rico. Six N treatments: 0, 22, 45, 90, 180 and 360 kg/ha were tested in inoculated and noninoculated plots arranged in a split-plot design with 4 replications. The application of 22 kg/ha of N in the inoculated plots increased plant nodulation 4 and 8 weeks after planting. Higher rates of N fertilization reduced the number and size of bean nodules at both sampling dates. On the other hand, dry beans consistently increased with applications of 0 to 180 kg/ha of N in the presence of <em>Rhizobium</em>. ER -