vermi compost cow dung

abstract agricultural agriculture angle animal background bedding bio biodegradable biological biology biotechnology brown compose compost compound cow create cultivated cultivation decomposing decomposition dirt dirtied dirty dung earth earthworm earthworms environment environmental farm fertilizer field food garden good ground grow growth humus ingredient isolated land materials mixture natural nature nourishment nutrient organic plant preparation process product quality red reusing rural species tropical vegetable vermi vermi-compost vermicast vermicompost waste white wigglers working worm worms