Aim of study: Humic substances (HS) have an impact on the dynamics of phosphorus (P) and zinc (Zn) in soil and consequently can affect the availability of both nutrients to plants. This work aimed to study the effect of humic substances on the availability of P and Zn to wheat depending on the main sorbent surfaces in growth media. Area of study: Growth chambers of the Higher Technica... https://www.markbroyard.com/great-pick-ego-sebitar-solution-500ml-supply-limited-choice/