Dutch agriculture faces challenges due to cutbacks on derogation limiting manure and fertilizer application and a focus on nutrient-contaminated areas. To maintain crop quality, farmers are seeking methods to achieve the same or higher yields with less nutrient input. We are testing various tools to gain insight into the nutrient availability in the soil and leaf juice. Together they provide information on how successful the current nutrient management is and if further nutrient application is necessary. Using this information the farmer can make improvements in their nutrient management system.