... matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... organic matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... organic matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... matter: 20% + Ca, Mg, Zn, Fe, etc.2. ... matter: 50% + Ca, Mg, Zn, Fe, etc.2. ... matter: 50% + Ca, Mg, Zn, Fe, etc.2. ... matter: 50% + Ca, Mg, Zn, Fe, etc.2. ... organic matter: 50% + Ca, Mg, Zn, Fe, etc.Validity: ...