Cau Dien compost is a nutriment which is nutrient for soil and good for trees, is manufactured in Spain, is upgraded by Japanese technology especially the controllability fermentative technique (temperature, moisture, oxygen, pH, C/N), and is supported by JICA 3R Hanoi. The input material is organics which is source separation (more than 92% of organics). Cau Dien compost has the stable quality and its nutrients ingredient is balanced among N, P and K, especially the organics content is higher with 22.5%.