# The Action Programme for Nitrate Vulnerable Zones (Scotland) Regulations 2008, Schedule 3: Calculation of maximum nitrogen application to crops

Extent: S

Table 1
Nitrogen Residue Group 1 – Previous Crops in Nitrogen Residue Group 1 are: cereals, carrots, swedes, turnips (removed) & linseed
Predominant Soil Type in Field
Planned crop
Standard yield (t/ha)
Sand or shallow
Sandy loam or other mineral
Humose
Peaty
Adjustments
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
There is no upward adjustment for excess winter rainfall on N Residue Group 1 Crops
Spring Barley (c)(e)
5.5
150
130
80
50
Winter Barley (c)
6.5
200
180
120
80
Spring Wheat (a)(b)
7.0
170
150
100
60
Winter Wheat (a)(b)
8.0
220
200
140
80
Spring Oats (c)
5.0
120
100
50
20
Winter Oats (c)
6.0
160
140
90
50
Spring Oilseed Rape
n/a
100
100
50
20
Winter Oilseed Rape (spring) (d)
4.0
200
200
120
80
Winter Oilseed Rape (autumn)
n/a
30
30
30
30
Potatoes
n/a
245
225
175
145
Forage Maize, Rape
n/a
140
120
70
40
Kale
n/a
180
160
100
60
Swedes and Turnips
n/a
110
90
50
20
Linseed
n/a
80
60
30
0
Nitrogen Residue Group 2 - Previous Crops in Nitrogen Residue Group 2 are: - harvested fodder (whole crop), oilseed rape, hemp, vining peas & potatoes
(1) low N means average N use in last 2 years was less than 150kg/ha/year
Grassland Management Regimes in Residue Group 2: - 1-2 year low N leys(1), not grazed within 2 months of ploughing out or during September or October
Predominant Soil Type in Field
Planned crop
Standard yield
(t/ha)
Sand or shallow
Sandy loam or
Other mineral
Humose
Peaty
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
If actual localised rainfall from 1st Oct – 1st March exceeds 450 mm: add 10kgN/ha
Spring Barley (c) (e)
5.5
140
120
70
40
Winter Barley (c)
6.5
190
170
110
70
Spring Wheat (a) (b)
7.0
160
140
90
50
Winter Wheat (a) (b)
8.0
210
190
130
70
Spring Oats (c)
5.0
110
90
40
10
Winter Oats (c)
6.0
150
130
80
40
Spring Oilseed Rape
n/a
90
90
40
10
Winter Oilseed Rape (spring) (d)
4.0
190
190
110
70
Winter Oilseed Rape (autumn)
n/a
20
20
20
20
Potatoes
n/a
235
215
165
135
Forage Maize, Rape
n/a
130
110
60
30
Kale
n/a
170
150
90
50
Swedes and Turnips
n/a
100
80
40
10
Linseed
n/a
70
50
20
0
Adjustments
Nitrogen Residue Group 3 - Previous Crops in Nitrogen Residue Group 3 are: - harvested fodder (root only), beans, combining peas & whole crop lupins
(2) high N means average N use in last 2 years was more than 150kg/ha/year, or high clover
Grassland Management Regimes in Residue Group 3:
1-2 year low N leys, grazed within 2 months of ploughing out or during September or October
1-2 year high N leys, not grazed within 2 months of ploughing out or during September or October
Thin permanent grass, low N, no clover
Predominant Soil Type in Field
Planned crop
Standard yield
(t/ha)
Sand or shallow
Sandy loam or other mineral
Humose
Peaty
Adjustments
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1st Oct – 1st March exceeds 450 mm:
add 20kgN/ha to crops grown in sandy, shallow or sandy loam soils
add 10kgN/ha to crops grown in other mineral, humose and peaty soils
Spring Barley (c)(e)
5.5
130
110
60
30
Winter Barley (c)
6.5
180
160
100
60
Spring Wheat (a)(b)
7.0
150
130
80
40
Winter Wheat (a)(b)
8.0
200
180
120
60
Spring Oats (c)
5.0
100
80
30
0
Winter Oats (c)
6.0
140
120
70
30
Spring Oilseed Rape
n/a
80
80
30
0
Winter Oilseed Rape (spring) (d)
4.0
180
180
100
60
Winter Oilseed Rape (autumn)
n/a
10
10
10
10
Potatoes
n/a
225
205
155
125
Forage Maize, Rape
n/a
120
100
50
20
Kale
n/a
160
140
80
40
Swedes and Turnips
n/a
90
70
30
0
Linseed
n/a
60
40
10
0
Nitrogen Residue Group 4 - Previous Crops in Nitrogen Residue Group 4 is: - grain lupin
Grassland Management Regimes in Residue Group 4:
-
1-2 year high N leys, grazed within 2 months of ploughing out or during September or October
-
3-5 year low N leys², not grazed within 2 months of ploughing out or during September or October
-
Thick permanent grass, low N
Predominant Soil Type in Field
Planned crop
Standard yield
(t/ha)
Sand or shallow
Sandy loam or other mineral
Humose
Peaty
Adjustments
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1st Oct – 1st March exceeds 450 mm:
add 20kgN/ha to crops grown in sandy, shallow or sandy loam soils
add 10kgN/ha to crops grown in other mineral, humose and peaty soils
Spring Barley (c)(e)
5.5
110
90
40
10
Winter Barley (c)
6.5
170
140
80
40
Spring Wheat (a)(b)
7.0
130
110
60
20
Winter Wheat (a)(b)
8.0
180
160
100
40
Spring Oats (c)
5.0
80
60
10
0
Winter Oats (c)
6.0
130
100
50
10
Spring Oilseed Rape
n/a
60
60
10
0
Winter Oilseed Rape (spring) (d)
4.0
140
140
80
40
Winter Oilseed Rape (autumn)
n/a
0
0
0
0
Potatoes
n/a
205
185
145
115
Forage Maize, Rape
n/a
100
80
30
0
Kale
n/a
140
120
60
20
Swedes and Turnips
n/a
80
60
20
0
Linseed
n/a
10
0
0
0
Nitrogen Residue Group 5 - Previous Crops in Nitrogen Residue Group 5 are: - leafy brassica vegetables, leafy non-brassica vegetables & grazed fodder
Grassland Management Regimes in Residue Group 5:
-
3 - 5 year high N leys, not grazed within 2 months of ploughing out or during September or October
-
3 - 5 year low N leys, grazed within 2 months of ploughing out or during September or October
-
Permanent grass, high N, not grazed within 2 months of ploughing out or during September or October
Predominant Soil Type in Field
Planned crop
Standard yield
(t/ha)
Sand or shallow
Sandy loam or other mineral
Humose
Peaty
Adjustments
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1st Oct – 1st March exceeds 450 mm:
add 20kgN/ha to crops grown in sandy, shallow or sandy loam soils
add 10kgN/ha to crops grown in other mineral, humose and peaty soils
Spring Barley (c)(e)
5.5
80
60
10
0
Winter Barley (c)
6.5
140
110
50
10
Spring Wheat (a)(b)
7.0
100
80
30
0
Winter Wheat (a)(b)
8.0
150
130
70
10
Spring Oats (c)
5.0
50
30
0
0
Winter Oats (c)
6.0
100
70
20
0
Spring Oilseed Rape
n/a
30
30
0
0
Winter Oilseed Rape (spring) (d)
4.0
110
110
50
0
Winter Oilseed Rape (autumn)
n/a
0
0
0
0
Potatoes
n/a
175
155
135
105
Forage Maize, Rape
n/a
70
50
0
0
Kale
n/a
110
90
30
0
Swedes and Turnips
n/a
70
50
10
0
Linseed
n/a
10
0
0
0
Nitrogen Residue Group 6
Management Regimes in Residue Group 6:
-
3 -5 year high N leys, grazed within 2 months of ploughing out
-
permanent grass, high N, grazed within 2 months of ploughing out
Predominant Soil Type in Field
Planned crop
Standard yield
(t/ha)
Sand or shallow
Sandy loam or other mineral
Humose
Peaty
Adjustments
(a)For wheat, an additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(b)For wheat, an additional 40kgN/ha is permitted to milling wheat varieties.
(c)For barley and oats, an additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
(d)On winter oil seed rape, the spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
(e)On spring barley, an additional 15kgN/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1 Oct – 1 March exceeds 450 mm:
add 20kgN/ha to crops grown in sandy, shallow or sandy loam soils
add 10kgN/ha to crops grown in other mineral, humose and peaty soils
Spring Barley (c)(e)
5.5
40
20
0
0
Winter Barley (c)
6.5
100
70
10
0
Spring Wheat (a)(b)
7.0
70
0
0
0
Winter Wheat (a)(b)
8.0
110
90
30
0
Spring Oats (c)
5.0
10
0
0
0
Winter Oats (c)
6.0
60
30
0
0
Spring Oilseed Rape
n/a
0
0
0
0
Winter Oilseed Rape (spring) (d)
4.0
70
70
10
0
Winter Oilseed Rape (autumn)
n/a
0
0
0
0
Potatoes
n/a
135
115
115
115
Forage Maize, Rape
n/a
30
10
0
0
Kale
n/a
70
50
0
0
Swedes and Turnips
n/a
50
30
0
0
Linseed
n/a
0
0
0
0
Table 2
Site Classes– Applicable to grassland
Grassland production is limited by growing conditions, in particular the quantity of rainfall between April and September and soil type. The combined effect of these factors defines the site class.
Average April – September rainfall mm (inches)
Soil texture
More than 500
425–500
350–425
Less than 350
(20)
(17–20)
(14–17)
(14)
Sands and shallow soils
2
3
4
5
All other soils
1
2
2
3
Table 3
Maximum nitrogen application to grassland
Site
Site
Site
Site
Site
Grass management
Class 1
Class 2
Class 3
Class 4
Class 5
kgN/ha
kgN/ha
kgN/ha
kgN/ha
kgN/ha
2 or 3 cut silage and grazing
310
300
290
280
270
1 cut silage and grazing
280
270
260
250
240
Grazing with low clover
270
260
250
240
230
Hay and grazing
220
210
200
190
180
Grass with high clover
100
90
80
70
60
Table 4
Percentage of Nitrogen available to next crop
PART A—Farmyard manure (FYM) – Percentage of nitrogen available to next crop following FYM applications (all crops and all soil types).
FYM type
Manure Reference Number
Total N (kg/t)
Dry Matter %
% N available to following crop
Cattle FYM
1
6
25
10
Separated solids from cattle slurry
2
4
20
10
Pig FYM
3
7
25
10
Separated solids from pig slurry
4
5
20
10
Sheep FYM
5
7
25
10
Duck FYM
6
6.5
25
10
Horse FYM
7
7
30
10
PART B—Poultry manure – Percentage of nitrogen available to next crop following Poultry Manure applications (use the value in brackets for grassland and winter oilseed rape cropping).
*These values assume incorporation by ploughing. Cultivation using discs or tines is likely to be less effective in minimising ammonia losses and intermediate values of nitrogen availability should be used.
Autumn
Winter
Spring
Summer use on Grassland
August–October
November–January
February–April
Manure Type
Manure Reference Number
Incorporation time*
Total N (kg/t)
Dry Matter %
Sands Sandy Loams Shallow
All other soils
Sands Sandy Loams Shallow
All other soils
All Soils
All Soils
Layer manure
8
Over 24 hrs
19
35
20
25 (30)
25
25
35
35
Layer manure
9
Within 24 hrs
19
35
20
25 (30)
25
40
50
N/A
Broiler/Turkey litter
10
Over 24 hrs
30
60
20
35 (40)
20
25
30
30
Broiler/Turkey litter
11
Within 24 hrs
30
60
20
30 (35)
20
30
40
N/A
PART C—Cattle, Dirty Water and Pig Slurry – Percentage of nitrogen available to next crop following Cattle Slurry, Dirty Water and Pig Slurry applications (use the value in brackets for grassland and winter oilseed rape cropping).
Autumn
Winter
Spring
Summer use on Grassland
August-October
November-January
Feb - April
Manure Type
Dry
Matter
%
Ref
No.
Incorporation time/method
Total N
(kg/t)
Sands
Sandy Loams
Shallow
All other soils
Sands
Sandy Loams
Shallow
All other soils
All
Soils
Cattle slurry – Surface applied
2
12
Not incorporated
1.6
20
30 (35)
30
30
45
30
Cattle slurry – Surface applied
6
13
Not incorporated
2.6
20
25 (30)
25
25
35
25
Cattle slurry – Surface applied
10
14
Not incorporated
3.6
20
20 (25)
20
20
25
20
Cattle slurry – ploughed in
2
15
Within 6 hrs
1.6
20
35 (40)
30
35
50
N/A
Cattle slurry – ploughed in
6
16
Within 6 hrs
2.6
20
30 (35)
25
30
40
N/A
Cattle slurry – ploughed in
10
17
Within 6 hrs
3.6
20
25 (30)
20
25
30
N/A
Cattle slurry – Band-spread
2
18
Band-spread
1.6
20
30 (35)
30
30
50
40
Cattle slurry – Band-spread
6
19
Band-spread
2.6
20
25 (30)
25
25
40
30
Cattle slurry – Band-spread
10
20
Band-spread
3.6
20
20 (25)
20
20
30
25
Cattle slurry – shallow injected
2
21
Shallow injected
1.6
20
30 (35)
35
35
55
45
Cattle slurry – shallow injected
6
22
Shallow injected
2.6
20
25 (30)
30
30
45
35
Cattle slurry – shallow injected
10
23
Shallow injected
3.6
20
20 (25)
25
25
35
30
Separated – Strainer box
*
24
Select from above
1.5
*Use the appropriate values for 2% dry matter cattle slurry
Separated – Weeping wall
*
25
2
Separated – Mechanical
*
26
3
Dirty Water
0.5
27
Not incorporated
0.5
20
35 (40)
35
35
50
30
Pig slurry – surface applied
2
28
Not incorporated
3.0
25
35 (40)
40
40
55
55
Pig slurry – surface applied
4
29
Not incorporated
3.6
25
30 (35)
35
35
50
50
Pig slurry – surface applied
6
30
Not incorporated
4.4
25
25 (30)
30
30
45
45
Pig slurry – ploughed in
2
31
Within 6 hrs
3.0
25
45 (50)
35
50
65
N/A
Pig slurry – ploughed in
4
32
Within 6 hrs
3.6
25
40 (45)
30
45
60
N/A
Pig slurry – ploughed in
6
33
Within 6 hrs
4.4
25
40 (45)
30
40
55
N/A
Pig slurry – Band-spread
2
34
Band-spread
3.0
25
35 (40)
40
40
60
60
Pig slurry – Band-spread
4
35
Band-spread
3.6
25
35 (40)
35
35
55
55
Pig slurry – Band-spread
6
36
Band-spread
4.4
25
30 (35)
35
35
50
50
Pig slurry - shallow injected
2
37
Shallow injected
3.0
25
40 (45)
45
45
65
65
Pig slurry - shallow injected
4
38
Shallow injected
3.6
25
35 (40)
40
40
60
60
Pig slurry - shallow injected
6
39
Shallow injected
4.4
25
35 (40)
40
40
55
55
Mechanical separator
**
40
Select from above
3.6
**Use the appropriate value for 2% dry matter pig slurry
Table 5
Percentage nitrogen content taken up by a crop per given quantity of livestock manure
Column 1
Column 2
Column 3
Type of livestock manure
Percentage content of nitrogen taken up by crop until and including 31 December 2011
Percentage content of nitrogen taken up by crop on and from 1st January 2012
Cattle slurry
20%
40%
Pig slurry
25%
50%
Poultry manure or litter
20%
30%
Solid manure
10%
10%

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Source: https://www.legislation.gov.uk/ssi/2008/298/schedule/3 (the official version)
Page: https://openlegislation.uk/action-programme-for-nitrate-vulnerable-zones-scotland-regulations-2008/schedule-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.