3. Standard values and information needed to determine the nitrogen content of organic manures

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You can use either the standard values provided in Table 7 or manure sampling and analysis (see the 'Protocol') to determine the total nitrogen content of imported or exported livestock manures when assessing your compliance with the livestock manure N farm limit (follow the calculations in Leaflet 5). To note: when calculating the total nitrogen content of manures produced by livestock kept on your farm for the livestock manure N farm limit you must use the standard figures in Tables 1 - 4. These figures have been derived differently from those provided in Table 7, as they are used for different purposes, and therefore are not directly comparable.

Table 7 also provides a figure for the maximum application rate that would supply the maximum amount of total N permitted under the organic manure N field limit of 250 kg N/ha/yr (follow the calculations in Leaflet 8). To note: these figures are provided for guidance only and you should determine a suitable application rate for your specific circumstances.

Table 7 contains data for goat farmyard manure and horse manure. These were not shown in Schedule 2 in the Regulations, from which the table is derived, but if these figures are used it will not be considered a breach of the rules.

Table 8 must be used when calculating 'crop available N' from any livestock manure applications when assessing your compliance with the N max limit (follow the calculations in Leaflet 7).

Table 7: The total N content of organic manures and maximum application rates to supply 250 kg N/ha of total nitrogen

Table 8: The percentage of the total nitrogen content of livestock manures that is available for crop uptake in the growing season in which it is spread to land (i.e. crop available N)

Note: Only for use in the N max calculation.