Hemp4Soil Project Report

The Hemp4Soil EIP Project, conducted over one year, explored the potential of industrial hemp to promote regenerative agriculture on the Loop Head Peninsula in County Clare, Ireland. It aimed to enhance soil health, biodiversity, and carbon sequestration while providing farmers with alternative revenue streams. The study tested the Futura 75 hemp variety under four treatments: unamended soil, hemp with biochar, hemp with a biochar-slurry mix, and control plots without hemp. Soil samples collected at baseline, mid-point, and harvest were analysed for soil properties, microbial biodiversity (using DNA extraction and next-generation sequencing), and earthworm populations. In amended plots, key findings revealed slight increases in total carbon, nitrogen, and potassium. Biochar and biochar-slurry treatments influenced microbial diversity and promoted taxa that are beneficial for nitrogen cycling. Organic amendments supported better hemp growth, with the biochar-slurry mix producing the highest biomass. No significant effects were observed on soil carbon stocks, earthworm populations, or species richness. The project raised awareness of regenerative farming through events, workshops, and media outreach, sparking interest in hemp cultivation. While findings suggest industrial hemp can contribute to soil health and biodiversity, longer-term studies are needed to confirm its benefits. Continued community support and investment in sustainable agriculture are vital. The Hemp4Soil Project highlights the potential of industrial hemp as a tool for regenerative farming and sustainable agriculture.