Slow release nitrogen fertiliser - based on acylated urea

摘要

The fertiliser is based on a 1-4C acylated urea as N-source. In an example a mixt. of CuSO4 (20g), Fe2(SO4)3 (10g) and a powdered mixt of acetyl urea, alkali sinter phosphate and K2SO4 such that N: P2O5 : K2O = 3:1:2/m3 (2-6 kg) are mixed with a peat/sand 5:1 mixt. used as a base for growing Camellia japonica.