Randomized Block Design evaluates effects on sorghum production in Medan, suggesting beneficial uses for coffee waste.
This study aims to determine the response of growth and production of sorghum (Sorghum bicolor L.) Kawali Variety to the Application of Coffee Peel Waste and NPK 16:16:16 Fertilizer in Ratoon I. This research was conducted at Jalan Harmonika Baru, Padang Bulan Selayang II, Medan Selayang District, Medan with an altitude of ± 25 meters. This research was conducted from June to October 2023. The design used Randomized Bloc Design (RBD) with 2 factors I coffee skin compost: 0 kg/plot, 3.5 kg/plot, 7 kg/plot, and 10.5 kg/plot. Factor II NPK 16:16:16 fertilizer: 0 g/planting hole and 20 g/planting hole. Based on the results of the research conducted that the provision of coffee skin compost has a significant effect on plant, stem diameter, number of tillers, 1000 seed production, seed production per sample. The application of NPK 16:16:16 fertilizer has an effect on stem diameter. The interaction of the treatment of coffee husk compost and NPK 16:16:16 fertilizer had a significant effect on plant height.
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Ginting et al. (2025) studied this question.
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