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How Reactive Phosphate Rock (RPR) Works: Slow Release Phosphorus Fertiliser

This lesson explains how Reactive Phosphate Rock (RPR) works as a slow-release phosphorus fertiliser. Dr Ants Roberts, Science Mentor, outlines how particle size and soil acidity control the rate of dissolution, why RPR releases phosphorus over several years, and how ongoing applications build long-term soil fertility. A practical guide to understanding when RPR is suitable for phosphorus management on farm.

 

Video details
Duration 1:27

Presented by

Dr Ants Roberts, Science Mentor at Ravensdown

Dr Ants Roberts

Science Mentor

Dr Ants Roberts is a Science Mentor at Ravensdown and a recognised authority on soil fertility management with more than four decades of experience. He leads agronomic research and development, works directly with farming shareholders, and trains Agri Managers and staff in soils, fertilisers and pastoral agriculture.