ABSTRACTThis study aims to determine the effect of giving various types of ash on the availability of nitrogen nutrients in peat soil. This research was conducted at the Soil Physics-Chemical Laboratory of the Faculty of Agriculture, Lambung Mangkurat University from June 2020 to August 2020. The experimental research method used was a one-factor completely randomized design (CRD) with 5 treatments and 5 replications. So that there are 25 experimental units. The 5 treatments used were: K = peat without the addition of ash, P = peat + rice husk ash 10ton ha-1, S = peat + oil palm ash 10ton ha-1, AB = peat + coal ash 15ton ha-1, Kp = peat + lime 10ton ha-1. The parameters observed were nitrogen in the form of ammonium (NH4 +) and nitrate (NO3-).ABSTRACT
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