Respon Pertumbuhan dan Produksi Sorgum (Sorghum bicolor (L.) Moench) terhadap Pemberian Limbah Kulit Kopi dan Pupuk NPK

Abstract

The aim of this study was to determine the influence of coffee bark waste as a growing medium and the addition of NPK fertilizer on the growth and production of sorghum plants. The study was conducted on community land in Jalan Harmonika Baru, Padang Bulan Selayang II, Medan Selayang District, Medan in June to November 2022. The study used a two-factor Randomized Group K (RAK) and three iterations, the first factor being Coffee Skin Waste and the second factor being NPK 16-16-16. The observed variables are plant height, trunk diameter, weight of fresh shoots, weight of dry shoots, weight of fresh roots, weight of dry roots, weight of 1000 seeds, weight of sample seeds, weight of seeds per plot and flowering age. The results of the study showed that the treatment of coffee leaf waste 9 kg/plot actually improved almost all of the observed variables except in flowering age. Treatment of NPK 20 g/real planting hole improved all observed variables. The combination of treatment of coffee husk waste 9 kg/plot and NPK 20 g/planting hole was the best combination in improving all observed variables