Cauliflower and broccoli have a low nitrogen-utilisation index. Only 57% and 51% of the total amount of nitrogen that is available to the crop is actually absorbed by the crop. In addition, large amounts of nitrogen stay behind in the crop residues which makes it impossible to meet the Nitrates Directive of 50 ml/l nitrate in the groundwater.
To meet these standards in the future, other cultivation systems are needed. Also will be aimed to reduce the use of pesticides. Growers will only accept these systems when is shown that they are robust, reliable and economically viable. The aim of this project is to provide Dutch cauliflower- and broccoli growers with cultivation systems that can reduce the leaching of nitrogen and phosphorus by more than 70%.