Question

Calculate the amount of K₂O that would be contained in 600kg of a compound fertilizer, 30:20:10(N:P₂O₅:K2O respectively)

Answer 1

10kg K₂O is contained in 100kg of the fertilizer;
600kg fertilizer=¹⁰/₁₀₀  × 600
                       =60 Kg K₂O