The paper presents data on the annual rate of humus accumulation after 10 and 20 years of a strict experimental routine carried out on sterile waste dumps (anthropic protosol) from Căpuş, cultivated with maize, oat and esparcet. Basic dressing applied was the following: V₁ – unfertilizcd, V₂ – 40 t/ha manure, V₃ – 15 t/ha poultry manure, V₄ – 40 t/ha manure + N₁₀₀ P₆₀ K₄₀, V₅ – 15 t/ha poultry manure + N₁₀₀ P₆₀ K₄₀, V₆ – N₁₀₀ P₆₀ K₈₀, V₇ – N₁₀₀ P₆₀ K₄₀, V₈ – N₂₀₀ P₁₂₀ K₈₀, V₉ – N₃₀₀ P₁₈₀ K₁₂₀. The results obtained revealed that the variant with 40 t/ha manure + N₁₀₀ P₆₀ K₄₀ (V₄) after 10 years accumulated 1.724% humus and after 20 years 4.100% humus. It means that the annual average rate was 0.115% and 0.176%, respectively, at a depth of 0-20 cm. The next variant is the variant with 15 t/ha poultry manure+ N₁₀₀ P₆₀ K₄₀ (V₅) where 1.207% of humus was accumulated after 10 years and 3.760% of humus after 20 years; the annual average rate 0.055% and 0.155%, respectively.