Effectiveness combination of leucaena compost and coconut shell biochar on reduce soil compaction and corn growth in ultisol

Abstract

This study aims to identify optimal dose combinations that significantly impact reducing soil compaction in Ultisols and corn growth. The randomized block design (RBD) was utilized to conduct the study. The ameliorant materials consisted of leucaena compost and coconut shell biochar, which were divided into ten treatments and three treatments with 10 treatments & 3 group for each treatment. The treatments were combinations of coconut shell biochar leucaena compost and inorganic fertilizer. Soil physical parameters, such as soil organic matter, bulk density, porosity, and penetration resistance, were monitored during the study. The analysis was conducted using ANOVA at 95% confidence level (α = 5%). Subsequently, Duncan Multiple Range Test (DMRT) was conducted to evaluate the average effect of treatment. The result of the study indicated that Treatment of 5 tons/ha compost + 5 tons/ha biochar + ½ dose of inorganic fertilizer was able to reduce soil density compared to the control and showed a decrease in bulk density, as well as an increase in soil porosity, and a decrease in the value of soil penetration resistance. Treatment of 10 tons/ha of compost with 10 tons/ha of biochar + ½ dose of inorganic fertilizer is the best treatment for corn growth.