Release Kinetic Model of Phosphorus Release Encapsulated in Starch-Alginate Controlled Released Fertilizer

To produce supplement of P- nutrient (phosphorus) to the plants, controlled release fertilizer (CRF) based on starch-alginate combination crosslinked with calcium chloride using encapsulation method was researched for agricultural purpose. High performance liquid chromatography is used to determine the release rate of phosphorus. Due to lack of data, the kinetic model is not found. Further data is needed to find the best fitting kinetic model for the release rate of phosphorus. The 3 kinetic models used to analyse in this experiment is Higuchi model, Fickian diffusion model and non - Fickian model.