Researchers at the Universidad Politécnica de Madrid have released a study showing that ammonia emissions associated with crop fertilization could be reduced by as much as 82% by modifying fertilizer application strategies. The researchers tested 11 different application scenarios and found that they reduced ammonia emissions.
Four of the scenarios also increased crop yield. The most promising results were achieved by combining the addition of manure and reductions in the amount of urea fertilizers. Manure was incorporated into the soil to depths of 10 cm.