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Category: Manure Management
Farm type
Arable
Arable + manure
Dairy
Beef
Broilers
Indoor pigs
Outdoor pigs
Reduction in pollutant loss at the farm scale
(baseline loss for the farm type is shown in parentheses)
Nitrate (kg N/ha)
Total P (kg P/ha)
FIOs (%)*
sandy loam
clay loam sandy loam clay loam sandy loam
clay loam
n/a (51)
n/a (47)
n/a (0.3)
n/a (2.3)
n/a
(0)
n/a
(0)
0.5 (57)
0.2 (51) 0.00 (0.4) 0.01 (2.5)
0
(1)
0
(1)
n/a (61)
n/a (34)
n/a (0.2)
n/a (2.8)
n/a (36)
n/a (100)
0.1 (18)
0.1 (12) 0.01 (0.2) 0.03 (1.0)
10 (15)
10 (43)
0.5 (82)
0.2 (68) 0.00 (0.4) 0.04 (3.2)
0
(0)
0
(0)
n/a (89)
n/a (74)
n/a (0.5)
n/a (3.7)
n/a
(4)
n/a (10)
n/a (10.5)
n/a (190)
n/a (108)
*Baseline losses for FIOs are in relative units, where the loss from the dairy farm system on a clay loam
soil = 100 units. Reductions are shown as percentage reductions of the baseline FIO loss.
Other benefits or risk of pollution swapping: The method will also reduce water pollution risks from
ammonium-N and elevated levels of BOD. It is unlikely to increase any pollutant losses above those
normally arising from manure storage.
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