<![CDATA[In the context of supporting the national food security program, increasing rice productivity should be directed toward the use of environmentally friendly fertilizers that can reduce dependence on synthetic chemical inputs. This study aimed to evaluate the effectiveness of liquid organic fertilizer (LOF) on vegetative growth, yield performance, and soil quality of rice variety PMJ-01. The research was conducted in a greenhouse located in Jotosanur, Lamongan, using 13 treatment combinations of LOF 3 ppm concentration and application frequency. The observed parameters included plant height, panicle length, 1000-grain weight, yield per clump, as well as soil quality indicators measured by pH, nitrogen (N), phosphorus (P), and potassium (K) content. The results showed that treatments P2 and P4 produced the best vegetative growth in terms of plant height, while treatments P2, P6, and P10 resulted in the longest panicles. The highest 1000-grain weight was obtained in treatments P2 and P11, whereas yield per clump significantly increased under treatments P2 and P11. Application of LOF 7 ppm also improved soil quality, particularly by increasing soil pH, although the levels of macronutrients (N, P, K) remained below the Indonesian National Standard (SNI). Thus, LOF has the potential to be an alternative to chemical fertilizers in rice cultivation. Therefore, developing LOF formulations with additional macronutrients is necessary to support increased productivity and sustainability of rice farming systems.]]>
