"Rich compost" refers to the decayed organic matter that is very nutrient-rich and suitable for improving the quality of soil in gardens or farms. Full definition
Their passion for premium quality materials allows them to produce their own nutrient rich compost on site with no artificial fillers. (rooflitesoil.com)
The program as a whole is impressive and a great model for reducing waste in other cities with nearby organic farms that can use rich compost. (treehugger.com)
You're invited to inspect the sewage works and find out how their waste, shredded office papers and kitchen preparation scraps are turned into rich compost in the onsite worm farm and then used to grow herbs for the kitchen. (kingfisherbay.com)