The research project, Determination of the concentration of nutrients N, P, K in selective organic solid waste from Ayaymaman market using the technique of composting, specific aims: Perform classification Generation Sectors Organic Solid Waste, Ayaymaman Market Moyobamba ~ity; build processing Composting for Organic Solid Waste; determine the concentrations of N, P, K, pH, electrical conductivity and organic matter contained in the compost. The problem statement was: What is the concentration of nutrients in selective organic solid waste, from Ayaymaman market? The variables were: lndependent Variable, Xi: Fields of study. And dependent variable Yi: concentration of nutrients N, P, K, EC, pH and organic matter. The hypothesis to prove, If, elaborate compost Organic Solid Waste selective Ayaymaman from the market, then the concentration of nutrients N, P, K are significant. The methodolo...