Optimization of Dried Nutmeg Leaf Compost on the Growth and Productivity of Red Potatoes (Solanum tuberosum L.) in the Highlands

The red potato (Solanum tuberosum L.) is a pivotal horticultural crop contributing to global food security. However, its sustainable production is challenged by overdependence on chemical fertilizers and the underutilization of local organic resources. In regions like North Maluku, Indonesia, nutmeg leaf waste remains largely unused despite its potential as an organic soil amendment. This study aims to assess the effect of various doses of compost fertilizer derived from dried nutmeg (Myristica fragrans) leaves on the growth and yield of red potato plants. The treatments included five compost doses: K0 (control, no compost), K1 (100 g/plant), K2 (200 g/plant), K3 (300 g/plant), and K4 (400 g/plant). Growth and yield parameters observed were plant height, number of shoots, number of tubers per sample and plot, and tuber weight per sample and plot. Results showed that dried nutmeg leaf compost significantly influenced plant performance, especially during weeks 7 and 8 after planting. The highest productivity was observed in treatment K4, with a plant height of 28.6 cm, increased shoot formation, an average of 84 tubers per plot, and a tuber weight of 840 g per plot. Statistical analysis supports the potential of dried nutmeg leaf compost as a sustainable, eco-friendly organic fertilizer that enhances red potato productivity.