biostudies-literatureUnknown12Goni OEnterprise IrelandIntensive agricultural production utilizes large amounts of nitrogen (N) mineral fertilizers that are applied to the soil to secure high crop yields. Unfortunately, up to 65% of this N fertilizer is not taken up by crops and is lost to the environment. To compensate these issues, growers usually apply more fertilizer than crops actually need, contributing significantly to N pollution and to GHG emissions. In order to combat the need for such large N inputs, a better understanding of nitrogen use efficiency (NUE) and agronomic solutions that increase NUE within crops is required. The application of biostimulants derived from extracts of the brown seaweed <i>Ascophyllum nodosum</i> has long been accepted by growers as a sustainable crop production input. However, little is known on how <i>AsFrontiers in plant science664682https://www.ebi.ac.uk/biostudies/studies/S-EPMC8132967biostudies-literatureReducing Nitrogen Input in Barley Crops While Maintaining Yields Using an Engineered Biostimulant Derived From <i>Ascophyllum nodosum</i> to Enhance Nitrogen Use Efficiency.PMC8132967Langowski LGoni OO'Connell SQuille PFeeney EfalseReducing Nitrogen Input in Barley Crops While Maintaining Yields Using an Engineered Biostimulant Derived From <i>Ascophyllum nodosum</i> to Enhance Nitrogen Use Efficiency.Intensive agricultural production utilizes large amounts of nitrogen (N) mineral fertilizers that are applied to the soil to secure high crop yields. Unfortunately, up to 65% of this N fertilizer is not taken up by crops and is lost to the environment. To compensate these issues, growers usually apply more fertilizer than crops actually need, contributing significantly to N pollution and to GHG emissions. In order to combat the need for such large N inputs, a better understanding of nitrogen use efficiency (NUE) and agronomic solutions that increase NUE within crops is required. The application of biostimulants derived from extracts of the brown seaweed <i>Ascophyllum nodosum</i> has long been accepted by growers as a sustainable crop production input. However, little is known on how <i>As2021-01-01T00:00:00Z20212025-04-05T10:30:32.313Z2025-04-05T10:30:32.313ZS-EPMC81329673402570210.3389/fpls.2021.664682