An understanding of how the substrate works with plants and nutrients leads to this conclusion (see the last section for more details).
Nhazi Setịpụrụ na- enye ohere ka onye ọrụ jiri aka rụọ ọrụ nhazi na nrụzi ọrụ (lee foto na-esote na ụlọ ahịa a maka nkọwa ndị ọzọ).