“The Effect of Concentration and Application Interval of Plant Growth-Promoting Rhizobacteria (PGPR) from Thorny Bamboo Roots (Bambusa blumeana) on the Growth and Yield of Chili Pepper (Capsicum frutescens L.) ”, metamorfosa, vol. 12, no. 2, pp. 134–147, Feb. 2026, doi: 10.24843/metamorfosa.2025.v12.i02.p4.