Nitrogen Testing Explained: How to Measure Soil N Supply for Crops
This lesson explains how nitrogen testing is used in arable farming to estimate soil nitrogen supply and guide fertiliser decisions. Dr Will Talbot, Scientific Officer, covers mineral nitrogen testing, the Potentially Mineralisable Nitrogen (PMN) test, and how regional climate and soil conditions influence nitrogen release. A practical guide to matching soil supply with crop demand for more precise and efficient nitrogen use.
Video details
Duration 2:17
Presented by
Dr Will Talbot
Scientific Officer, Ravensdown
Dr Will Talbot is a Scientific Officer at Ravensdown specialising in nitrogen and nutrient loss reduction. He studied Agricultural Science at Lincoln University, graduating with first class honours, before completing a PhD, with Deans list honours, in soil science focused on the nitrogen cycle. Dr Talbot has published multiple peer-reviewed papers that help inform smarter nutrient management across New Zealand farming systems.