Yard waste includes materials such as grass clippings, leaves, bushes, and tree prunings. The rate and composition of this waste vary across different seasons and regions. Disposal methods like landfilling and incineration (or combustion in waste-to-energy plants) are not suitable for handling materials such as grass, leaves, and branches. Because yard waste is a relatively clean and biodegradable material, sending it to landfills is both unnecessary and inefficient, as it consumes valuable landfill space. Moreover, its decomposition in landfills can lead to the generation of methane gas and acidic leachate, contributing to environmental problems.

The present study was conducted to compost yard waste using various admixtures and earthworms. The process design considered key stages, including solid waste recovery, preparation, composting, stabilization, and storage. Six different treatments of yard waste were prepared using three types of admixtures: Panchagavya, a green gram mixture, and cow dung. Earthworms (Eisenia fetida) were introduced into three of these partially decomposed treatments. Moisture content was maintained by regularly sprinkling water over the composting material. The results indicated that the nutrient content of the compost improved significantly with the addition of earthworms in appropriate proportions.