Northern Ireland’s Soil Scheme Tests Nearly Half of Fields

Nearly half of Northern Ireland’s fields have undergone testing as part of an initiative designed to assist farmers in understanding their soil’s nutrient content. Almost 70% of farms have registered for the Soil Nutrient Health Scheme, a program that is the first of its kind anywhere in the world. The Agri-Food and Biosciences Institute manages this £37 million undertaking. This program aids agricultural producers in comprehending their soil’s nutrient composition, including levels of nitrogen and phosphorus. These elements, through run-off, can contribute to issues with water quality and the formation of algal blooms in Lough Neagh. Consequently, fertilizer application can be optimized to specific areas, and excessive nutrients can be progressively reduced. The third year of the initiative is commencing in the north west region. Fields within zones one and two that have not yet been sampled will also be included. Soil samplers traverse each field in a W-shaped pattern, extracting soil plugs at predetermined intervals. These samples are subsequently analyzed to ascertain the field’s existing content and where future nutrient additions should be directed. Farmers receive comprehensive maps detailing the findings, along with instruction on what their fields require to achieve optimal soil health for grass cultivation. Alex Higgins, the project lead for the sampling program, noted that while every farm possesses distinct characteristics, the soil’s pH balance in the zones examined thus far was below recommended thresholds. He explained that variations in the average pH between zones one and two reflected differences in agricultural practices and “physical conditions, such as higher rainfall, as you move west.” However, he further stated that the average pH in both zones “sits below the optimum levels, which would be most effective at maximising nutrient uptake.” Adjusting soil to be more neutral in its acid-alkaline properties will also assist in diminishing the run-off of nutrients such as nitrogen (N) and phosphorus (P) into aquatic environments like Lough Neagh. Scientists have indicated that the quantity of phosphorus already present in the lough will require approximately 40 years to naturally dissipate. Dr. Rachel Cassidy, the scheme’s scientific lead, reported that the phosphorus levels in the soils already tested exceeded the advised limit. She stated: “Considering ongoing concerns over Lough Neagh, farmers are encouraged to carefully consider their P applications and to use the results in conjunction with the online run-off risk maps, which indicate areas of fields most at risk of nutrient loss during rainfall.” By the program’s scheduled completion in 2026, the objective is for all 700,000 fields across Northern Ireland to have been sampled and mapped. Copyright 2024 BBC. All rights reserved. The BBC bears no responsibility for material found on external websites. Information regarding our approach to external links is available.