I. Potash Market: Tight Supply and Rising Prices Amid Strategic Standoff; Pre-Spring Ploughing Stockpiling Underway, Tight Circulation Becoming the Norm Recently, China’s domestic potash market has exhibited an unusual pattern of shrinking volumes alongside rising prices. Despite persistent market rumors suggesting policy coordination through long-term contract allocations and direct-supply releases, actual circulating volumes remain tight. Against this backdrop of reduced av

Sodium Tripolyphosphate (STPP) is a vital inorganic phosphate compound widely used in industrial production and food processing. Its molecular structure contains three phosphate units (PO₄³⁻) linked by oxygen bridges to form a linear chain. This unique structure provides multiple chelation-active sites. Consequently, STPP possesses excellent complexing, dispersing, emulsifying, and water-retention properties, making it one of the most produced and used polyphosphates globally

I. Forms and Availability of Phosphorus in Soil Soil phosphorus can be categorized into two major classes based on its chemical properties:  organic phosphorus  and  inorganic phosphorus . The vast majority exists in forms not readily available to plants, such as insoluble inorganic phosphates bound to iron, aluminum, and calcium, or as organic phosphorus compounds (e.g., phytates, phospholipids). Plants primarily absorb  orthophosphate ions (H₂PO₄⁻ or HPO₄²⁻)  from the soil