Prediction CEC Value of Soil Using pH Parameters, Organic Carbon and Exchangeable Alumunium (Al-dd) Elmus Rahma* (a), Suprapto (a)
(a) Chemistry Department, Sepuluh November Institute of Technology (ITS), ITS Campus : Sukolilo Street, Surabaya 60111, Indonesia
* newelmusrahma[at]gmail.com
Abstract
Cation Exchange Capacity (CEC) is one of the soil test parameters that shows the ability of the soil to hold exchangeable cations. CEC is the ability of the soil to hold positively charged ions, which is an important indicator of soil fertility. CEC is an important parameter because it affects soil structural stability, nutrient availability, pH and reaction to fertilizers. In Indonesia, generally the determination of CEC is carried out using the Ammonium Acetate method by shaking/extracting, but recently the development for determining CEC by means of Percolation has been carried out. However, both in the extraction and percolation methods, CEC testing is a difficult test, requires a lot of time and process, and uses a lot of solvents where the remaining solvent will be a waste. Another difficulty in this test is the precision results are not good compared to other parameters in soil fertility. In this study, predictions of CEC values will be made using linear regression with several parameters including pH H2O, Organic Carbon and Exchangeable Alumunium (Al-dd) where these three parameters can be analyzed easily in various soil laboratories. In this study, verification of the two CEC methods will also be carried out so that the test results can be accounted for. The results of the CEC test then compared using a t-test between the two methods to find out whether the two methods were significantly different.
