Classification of Inceptisol Soil on Robusta Coffee Plantation in Silima Pungga

Abstract

The survey study aims to classify the Inceptisol soil on Robusta coffee plantation in Silima Pugga-Pungga District, from Order level to Sub Group level. The study was conducted on location of sample soil profiles which were determined based on Soil Map Unit (SMU) with the main Inceptisol Order, i.e. from SMU 3 to SMU 7. The soil profiles were described to determine the morphological characteristics of the soil, while the physical and chemical properties were done by laboratory analysis. The soil samples were taken from each horizon in each profile and analyzed in the laboratory in the form of soil texture, bulk density, pH H₂O, pH KCl, C-organic, Bases Exchange (Ca²⁺, Mg²⁺, K⁺, Na⁺) and Cation Exchange Capasity (CEC). The results showed that the classification of Inceptisol soil on Robusta coffee plantation in Silima Pungga-Pungga District based on Soil Taxonomy 2014 has 2 (two) Sub Group, namely in SMU 3,4,5 and 7 are Typic Humudept and SMU 6 is Fluventic Humudept.