<![CDATA[Limited water availability and low soil organic matter constrain peanut productivity in former intensive paddy soils, requiring locally available soil amendments that can improve crop performance during dry cultivation periods. This study aimed to evaluate the growth and yield response of Hypoma peanut to different rice husk biochar rates under limited water availability. The experiment was conducted from January to April 2026 in a greenhouse located in Palang District, Tuban Regency, East Java, Indonesia. A randomized block design was used with four rice husk biochar rates, namely 0, 5, 10, and 15 t ha⁻¹, and four replications, resulting in 16 experimental units. Rice husk biochar was applied 10 days before planting, while plant height, number of leaves, plant dry weight, and 100-seed weight were measured at 56 days after planting and analyzed using analysis of variance followed by the least significant difference test at 5%. Rice husk biochar improved all observed growth and yield-related variables, with the strongest response generally obtained at 10 t ha⁻¹. This rate produced plant height of 42.7 cm, 58.7 leaves plant⁻¹, plant dry weight of 21.6 g plant⁻¹, and 100-seed weight of 46.9 g. Therefore, 10 t ha⁻¹ rice husk biochar was the most effective rate for improving Hypoma peanut performance under limited water availability. These findings support rice husk biochar as a sustainable soil amendment for peanut cultivation in water-limited, low-organic-matter soils.]]>
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