Effects of Biopore Infiltration Holes with Compost (BIHC) on Total Soil Nitrogen in Coffee Plantation

Nitrogen loss from the soil will reduce soil fertility and can ultimately affect coffee growth and production. Therefore, the use of Biopore Infiltration Holes with Compost (BIHC) in coffee plantations was assessed, including its effect on nitrogen content in the soil in the root zone of coffee. This study aimed to determine the increase in total nitrogen content in the soil and to analyze the relationship between chlorophyll content and leaf number. The study was conducted with a randomized block design. The treatment was in the form of biopores, namely without biopores (P1), 30 cm biopores and goat compost (P2), 30 cm biopores and coffee pulp compost (P3), 60 cm biopores and goat compost (P4), 60 cm biopores and coffee pulp compost (P5), 30 cm and 60 cm biopores and goat compost (P6), and 30 cm and 60 cm biopores and coffee pulp compost (P7). The data obtained were analyzed using an analysis of variance of 5%. The results showed that BIHC significantly affected total-N and positively correlated with the number of leaves and chlorophyll content. P2 treatment showed the highest total-N of 0.29% and 0.36% at 0-20 cm depth.