The potential of coffee ground compost to enhance soil pH, growth, and production of mustard greens in acid-dry land

Abstract

Abstract The deficiency of productive agricultural land was an obstacle to the development of mustard green cultivation. The utilization of acid-dry land is a solution for the development of mustard green cultivation. South Kalimantan has acid-dry land covering an area of 87.61% of the total dry land. The use of coffee grounds compost is an alternative technology for improving soil fertility in acid dry land. Coffee grounds compost can increase soil organic matter, so it can fertilize the soil and increase crop production. This study aims to determine the quality of coffee grounds compost and determine the best dosage of coffee grounds compost to increase soil pH, growth, and production of mustard greens in acid dry land. This research method used a single-factor randomized block design (RBD), namely the dose of coffee grounds compost: k0 = 0 t ha−1; k1 = 10 t ha−1; k2 = 20 t ha−1; and k3 = 30 t ha−1. The physical and chemical characteristics of coffee waste compost have met the criteria for quality compost based on SNI No. 19-7030-2004. The results showed the effect of coffee grounds compost on increasing soil pH, growth, and production of mustard greens. The best dose of coffee grounds compost in increasing soil pH, plant fresh weight, and mustard productivity was found in the K3 treatment with increases of 18.05%, 67.21%, and 67.21% respectively compared to the control. The best treatment for increasing plant height, number of leaves, and width of mustard leaves was treatment k1 with an increase of 51.34%, 31.03%, and 40.60% respectively compared to the control.