worm castings

agriculture animal arm art background beach benefit bio brown cast casting castings closeup coast compost design dirt earth earthworm ecology economize environment farm fertile fertilizer finger flower food footwear garden gardening grow hand invertebrate jewellery leaf leg limb manure nail natural nature nitrogen nutrient ocean organ organic outdoor pattern phosphorus plant poo potassium quality sand sandworm sea soil texture topsoil tropical vacation vermicompost water worm