Abstract: Disclosed is a compound for capturing carbon dioxide and improving the arability of soil. The compound includes a quantity of calcium hydroxide and a quantity of basalt. The calcium hydroxide improves the arability of soil by raising soil alkalinity and acting as a pH buffer to prevent it from becoming too acidic. The quantity of basalt sequesters carbon dioxide by providing reactive minerals capable of facilitating carbon mineralization. Also disclosed are methods of making and experimental results demonstrating the compound's efficacy.