Uji Efektivitas Abu Dan Biochar Cangkang Kemiri Serta Pemupukan NPK Pada Tanaman Jagung (Zea mays L.) Di Tanah Ultisol

Abstract

The increasing amount of candlenut shells that are difficult to decompose causes environmental pollution due to the accumulation of waste. Processing candlenut shell waste into ash or biochar can increase the benefits of candlenut shell. Candlenut shell ash and biochar can be used as ameliorants in NPK fertilization. This study aims to assess the effectiveness of ash and biochar candlenut shell in the availability of NPK nutrients in corn plants (Zea mays L.) in ultisol soil. This research was conducted in Pangururan, Samosir Regency, starting from June 2024 to November 2024. The results showed that ameliorants ash and biochar candlenut shell can increase the growth and production of corn plants (Zea Mays L.) in ultisol soil. Candlenut shell ash is more effective than candlenut shell biochar as ameliorant in NPK fertilization. The treatment of candlenut shell ash at a dose of 10 tons/ha and 1 dose of NPK fertilizer (A12) can increase the growth and production of corn plants (Zea Mays L.) in ultisol soil.