Cows and opportunities

In the dairy industry crops are fertilized with manure and artificial fertilizer to meet their need for nitrogen and phosphate. Prtial crop uptake of nitrogen and phosphate completely cause mineral surpluses in soils and losses to the environment. Therefore, the Nitrates Directive sets a maximum on animal manure. For some crops this is not enough so they are also enriched with artificial fertilizer.


The goal of this project is to map out what the agricultural and environmental consequences of the application of nitrogen with the liquid fraction are instead of artificial nitrogen fertilizer. Environmental impacts in this context are: 1) Nitrate leaching, 2) Ammonia-, nitrous oxide emissions, methane emissions and the impact on CO2 emissions, 3) Flow of phosphate and potash to the soil and 4) Leaching of heavy metals into the groundwater and surface water. Agronomic effects are: 1) Mineral balance (nitrogen and phosphate, 2) Utilisation of nitrogen, 3) Crop yield and -quality, 4) Operational management and 5) Financial results for the farmer.