This study evaluated nitrogen transfer from 81-year-old Caragana shelterbelts to adjacent forage crops in Saskatchewan, Canada using stable isotope analysis. The results showed up to 64% nitrogen transfer (32 kg N/ha) to triticale and 70% (23 kg N/ha) to oats. Nitrogen transferred from the shelterbelt contributed up to 50% of the nitrogen requirement of the crops. Only crude protein levels in the forage crops showed a significant relationship with nitrogen transfer levels. The study concludes that Caragana shelterbelts hold potential to complement nitrogen requirements of forage crops in agroforestry systems through nitrogen transfer.
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