The present study was undertaken to develop non-conventional organic amendments using agro wastes and evaluation of the effect of these organic amendments in increasing soil fertility and crop productivity in the sandy loam soils of Onattukara. For the development of non- conventional organic amendments, effective microorganism concentrate was prepared from locally available fruits and vegetables. Three types of non- conventional organic amendments were prepared from rice husk, rice straw, crop residues, aquatic weeds, cow dung, poultry manure, dry leaves and paper wastes and each were inoculated with EM concentrate, and it was converted into compost. Compost tea was also prepared from these composts. Evaluation of the effect of these non- conventional organic amendments on crop growth and yield was carried out using the tomato variety Vellayani Vijai as test crop. Yield and quality parameters were significantly influenced by the application of non- conventional organic amendments. Application of the recommended dose of fertilizers and organic manure (compost 3) as per KAU POP (T4) recorded significantly higher yield (2.69 kg per plant) compared to other treatments. Compost 3 was prepared from rice husk , rice straw, weed biomass, cow dung, poultry manure, rock phosphate and dolomite. Quality parameters like TSS, ascorbic acid, lycopene were also enhanced by the application of non- conventional organic amendments and compost tea. Application of non - conventional organic amendments from agrowastes resulted in a significant increase in yield and quality parameters of tomato compared to farmyard manure. Hence the scarcity of farmyard manure in this region can be overcome by the use of these non- conventional organic amendments for the improvement of soil health and enhanced crop productivity.