A granular composition that comprises one or more microorganisms, two or more plant powders and a biodegradable water-absorbent agent. Also provided is a method of producing a granular composition by admixing a composition comprising two or more plant powders and a biodegradable water-absorbent agent, and (i) one or more lubricants to form a dough, and processing the dough to form granules, or (ii) coating a substrate with the dough to form the granular composition. The microorganism can be located in the admixture, the dough or both the admixture and the dough. The granular composition is applied to soil to, for example, kill or control pests, maintain or increase plant or crop growth, maintain or increase pasture production, maintain or increase plant, crop or pasture yield, deliver probiotics to grazing animals or livestock, and/or bioremediate the soil.
