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Nitrogen farm surplus per ha - Derogation farms

Nitrogen farm surplus decreased in 2019
30/09/2021

The nitrogen farm surplus on farms in the derogation monitoring network fell to 164 kg/ha in 2019 and is therefore at a relatively low level compared to previous years. Compared to 2018, the nitrogen input per hectare decreased in particular. The nitrogen output per hectare in 2019 did not differ much from 2018.

Lower nitrogen farm surplus in 2019
The average nitrogen farm surplus on farms in the derogation monitoring network was relatively low in 2019 and amounted 164 kg/ha. Since 2006, the average nitrogen farm surplus was only lower in the year 2014 with favourable growing conditions, at 162 kg/ha. In 2018, the nitrogen farm surplus was still relatively high as a result of very dry weather conditions and therefore lower crop yields. In 2019, the nitrogen farm surplus was highest in the Clay Region with 187 kg/ha, followed by the Sand-230 Region with 162 kg/ha, the Sand-250 Region with 149 kg/ha and the Peat Region with 143 kg/ha. At 123 kg/ha, the Loess Region had the lowest nitrogen farm surplus in 2019. This was a decrease of 64 kg/ha compared to 2018.



Less nitrogen supply via feed in 2019  
In 2019, the average supply of nitrogen per hectare decreased to 339 kg/ha. In the four previous years, the average nitrogen supply was higher and varied from 361 to 370 kg/ha. In 2019, 199 kg of nitrogen per hectare was supplied from feed. The supply of nitrogen from feed was therefore clearly lower than in 2018. At that time, as a result of very dry weather conditions, 228 kg nitrogen per hectare was supplied from feed, mainly due to a negative stock change (= stock decrease). The nitrogen input from fertilisers increased in 2019 by almost 4 kg/ha compared to 2018 to 126 kg, but was still at a relatively low level compared to other years in the period 2006-2019. Feed and fertilisers were also by far the largest nitrogen inputs in 2019. The contribution of organic manure, animals and plant products to the total nitrogen input was of limited importance with a total of only 14 kg/ha in 2019. The nitrogen input via feed was by far the highest in 2019 in the Sand-230 Region with 251 kg/ha, followed at a distance by the Loess Region with 198 kg/ha. The Sand-230 Region was also the most intensive in terms of milk production per hectare in 2019. In the Sand-250 Region, the nitrogen supply via feed was lowest with 173 kg/ha. The nitrogen input via fertiliser was by far the highest in 2019 in the Clay Region with 152 kg/ha and lowest in the Loess region with 100 kg/ha. The total supply of nitrogen in 2019 was highest in the Sand-230 Region with 380 kg/ha, followed by the Clay Region (349 kg/ha), the Loess Region (307 kg/ha), the Peat Region (299 kg/ha) and the Sand-250 Region (292 kg/ha).



Lower nitrogen output in 2018 and 2019 
Over the entire period 2006-2019, the total nitrogen output from farms in the derogation monitoring network shows an upward trend. Especially after 2013 (143 kg nitrogen discharge per hectare), there was a sharp increase to 196 kg/ha in both 2016 and 2017. In 2018 and 2019 the total nitrogen output was again lower with 171 and 175 kg/ha respectively. Nitrogen discharge was lower in 2018, in particular due to less output from plant products (this concerns the construction and potential sale of roughage) as a result of lower crop yields due to dry weather conditions. In 2018, there was an output of 10 kg nitrogen/ha via plant products, compared to 32 kg/ha in 2017. In 2019, the output was 18 kg/ha. The output of organic manure also decreased in 2018 and 2019 and amounted to 51 and 48 kg/ha respectively. The largest nitrogen output item on farms in the derogation monitoring network in all years concerns the output via animal products (mainly milk). In 2019 this was 89 kg/ha, almost the same as in the previous three years. The output via organic manure was by far the highest in 2019 in the Sand-230 Region with 76 kg/ha, followed at a distance by the Loess Region with 52 kg/ha. The high nitrogen output via organic manure in the Sand-230 Region was the result of the high intensity on the one hand and of the regulations on the other, whereby from 2014 a maximum of 230 kg nitrogen per hectare from animal manure may be used on sandy soil in the provinces of Overijssel, Gelderland, Utrecht, Noord-Brabant and Limburg instead of 250 kg nitrogen.

The total output of nitrogen in 2019 was highest in the Sand-230 Region with 218 kg/ha, followed by the Loess region (184 kg/ha), the Clay region (162 kg/ha) and the Peat region (156 kg/ha). Nitrogen output was lowest in the Sand-250 Region with 143 kg/ha.




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Marga Hoogeveen
+3170-3358325
 

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