<![CDATA[Sustainable agriculture requires effective strategies for managing soil and water resources, one of whichis through the application of appropriate irrigation techniques and rice straw biomass amendments. Thisstudy aims to analyze soil nutrient content in variations of irrigation techniques and rice straw biomassamendments. The research was conducted at Subak Suala, Pitera Village, Penebel District, TabananRegency, using a Completely Randomized Design (CRD) consisting of two factors: variations inirrigation techniques (Ngenyatin, Flooding, and Alternate Wetting and Drying or AWD) and variationsin rice straw biomass amendments (burned rice straw and incorporated rice straw). Data were obtainedfrom treatments that were replicated five times, resulting in a total of 30 experimental plots. Parameterswere tested in the laboratory, and the data were analyzed using two-way analysis of variance (two-wayANOVA). The parameters analyzed included total nitrogen content, organic carbon, ammonium, andnitrate. The results of data analysis showed that the total nitrogen content ranged from 0.247% to0.412%, with an increase observed after the growing period in the incorporated rice straw-floodingtreatment. Organic carbon content ranged from 2.576% to 3.312%, with a decrease after the growingperiod noted in the incorporated rice straw-AWD treatment. Ammonium concentration ranged from4.551 to 8.248 ppm and decreased across all treatments, with the highest decline after the growing periodfound in the incorporated rice straw-Ngenyatin treatment. Meanwhile, nitrate concentration ranged from8.267 to 94.224 ppm, with a significant increase occurring in the burned rice straw-Ngenyatin treatment.Based on the analysis conducted, it can be concluded that the most effective treatment in maintaining181the balance of total nitrogen, C-organic, ammonium, and nitrate is incorporated rice straw (not burned)with the AWD (Alternate Wetting and Drying) irrigation technique.]]>
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