Impact of residues of chicken manure and oil palm shell biochar on water holding capacity and yield of peanuts in ultisol

Abstract

Abstract One of the problems in the development of food crops is the limited availability of fertile land so that the choice is only for less fertile soil, namely Ultisol, which are very widely available in Indonesia. One of the problems is the low organic matter content of the soil so that the ability to hold water in Ultisol is low. The addition of chicken manure and oil palm shell biochar separately or together has been shown to increase the ability of Ultisols to hold water and yield peanuts in the first growing season. The aim of the study was to see the effects of chicken manure and biochar residues in the second growing season. The study was conducted in the Teaching and Research Farm of the Faculty of Agriculture, University of Jambi for 6 months, using a Randomized Block Design (RBD) with 6 treatments, namely: P0 = without manure and biochar; P1 = 10 tons ha−1 manure; P2 = 7.50 tons ha−1 manure and 2.50 tons ha−1 biochar; P3 = 5 tons ha−1 manure and 5 tons ha−1 palm shell biochar, P4 = 2.50 tons ha−1 chicken manure and 7.50 tons ha−1 biochar ; P5 =10 tons ha−1 biochar. The results showed that the application of a combination of chicken manure and oil palm shell biochar was still able to maintain soil water content and peanut yield in the second growing season.