Table 14.3 - Measured nitrogen leaching rates from Danish agricultural and non-agricultural areas

Source: MiljØstyrelsen, 1991

  N-leaching (kg N/ha/year)
Nitrate Total N
Average
Crop Manure
application
Range Average
Natural areas no 0.5­3.3 2.5 (6) -
Green fallow no 2­5 4 (4) -
Permanent grass no 8­35 16 (4) -
Mixed clover and grass no 25 25 (1) 48 (1)
Winter crops and rape no 39­44 41 (3) 49 (2)
Winter crops and rape yes 29­88 62 (6) 78 (6)
Spring barley no 19­166 72 (12) 94 (11)
Spring barley yes 48­147 86 (5) 106 (5)
Root crops yes 28­154 88 (6) 111 (6)

Note: Numbers in parentheses indicate sample size