Purpose: Soil fertility management requires a precise assessment of nutrient release from organic amendments to decide the rates and frequency of application. Methods: Time-dependent release of some macro-and micro-nutrients from farmyard manure, mushroom compost, poultry manure, vermi-compost, biogas slurry and biochar of Lantana sp. was studied during 120 days incubation through entrapment of released nutrients on ion exchange resins. Results: Highest total concentration of K, Ca, Mg and S was in farmyard manure, Fe and Mn in mushroom compost, P, Zn and Cu in biogas slurry and B in biochar. Farmyard manure had the highest C: N ratio (34. 2), while other organic amendment had C: N ratio < 20. The highest release of P, Ca, Mg, Zn and Cu was recorded from biogas slurry, of K and S from farmyard manure, of B from poultry manure and of Fe and Mn from mushroom compost. Mean percentage of total nutrient released was 30. 5% P, 71. 8% K, 23. 1% Ca, 24. 4% Mg, 29. 3% S, 47. 2% Zn, 22. 9% Cu, 38. 6% Fe, 46. 6% Mn, and 70. 9% B. Nutrient release from different organic amendments conformed to zero-order kinetics. The percent of total released nutrient, release kinetic constants and half-life of nutrients was related to the properties of organic amendments. Conclusions: Based on the released amount of nutrients from different organic amendments, the best source seemed to be farmyard manure for S and K, mushroom compost for Fe and Mn, biogas slurry for P, Ca, Mg, Zn and Cu and poultry manure for B.