The Action Programme for Nitrate Vulnerable Zones (Scotland) Regulations 2008

Regulations 12, 13 and 19

SCHEDULE 3 Calculation of maximum nitrogen application to crops

Table 1

Maximum nitrogen application to arable and forage crops

PREVIOUS CROP: N residue group 1 –	cereals
	carrots
	swedes
	turnips (removed)
	linseed

		Predominant Soil Type in Field
Planned crop	Standard yield (tonne/ha)	Sand or shallow	Sandy loam or other mineral	Humose	Peaty
Adjustments
a. An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b. An additional 40kgN/ha is permitted to milling wheat varieties.
c. An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d. The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0 tonne/ha (“t/ha”).
e. An additional 15kg/N/ha is permitted for high N grain distilling varieties.
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

PREVIOUS CROP: N residue group 2 –	Harvested fodder (whole crop)	1–2 year low N leys1, not grazed within 2 months of ploughing out or during September or October
	oilseed rape
	hemp	(1low N means average N use in last 2 years was less than 150 kg/ha/year)
	vining peas
	potatoes

		Predominant Soil Type in Field
Planned crop	Standard yield(t/ha)	Sand or shallow	Sandy loam or other mineral	Humose	Peaty
Adjustments
a. An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b. An additional 40kgN/ha is permitted to milling wheat varieties.
c. An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d. The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
e. An additional 15kg/N/ha is permitted for high N grain distilling varieties.
If actual localised rainfall from 1st October – 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	140	120	70	40
Kale	n/a	170	150	90	50
Swedes and Turnips	n/a	100	80	40	10
Linseed	n/a	70	50	20

PREVIOUS CROP: N residue group 3 –	harvested fodder (root only)	1–2 year low N leys, grazed within 2 months of ploughing out or during September or October
	Beans
	combining peas	1–2 year high N leys2, not grazed within 2 months of ploughing out or during September or October
	whole crop lupins
		2high N means average N use in last 2 years was more than 150 kg/ha/year, or high clover)

		Predominant Soil Type in Field
Planned crop	Standard yield(t/ha)	Sand or shallow	Sandy loam or other mineral	Humose	Peaty
Adjustments
a An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b An additional 40kgN/ha is permitted to milling wheat varieties.
c An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
e An additional 15kg/N/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1st October – 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	140	120	70	40
Kale	n/a	160	140	80	40
Swedes and Turnips	n/a	90	70	30	0
Linseed	n/a	60	40	10	0

PREVIOUS CROP: N residue group 4 –	grain lupin	1–2 year high N leys, grazed within 2 months of ploughing outor during September or October
		3–5 year low N leys, not grazed within 2 months of ploughing outor 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. An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b. An additional 40kgN/ha is permitted to milling wheat varieties.
c. An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d. The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
e. An additional 15kg/N/ha is permitted for high N grain distilling varieties
If actual local rainfall from 1 October – 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	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	140	120	70	40
Kale	n/a	110	90	30	0
Swedes and Turnips	n/a	70	50	10	0
Linseed	n/a	10	0	0	0

PREVIOUS CROP:N residue group 5 –	leafy brassica vegetables	3–5 year high N leys, not grazed within 2 months of ploughing out or during September or October
	Leafy non-brassica vegetables
	grazed fodder	3–5 year low N leys, grazed within 2 months of ploughingout 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. An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b. An additional 40kgN/ha is permitted to milling wheat varieties.
c. An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d. The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
e. An additional 15kg/N/ha is permitted for high N grain distilling varieties
If actual local rainfall from 1 October – 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	80	60	10	0
Winter Barley c.	6.5	140	110	50	10
Spring Wheat a..b.	7.0	100	30	0	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

PREVIOUS CROP: N residue group 6 3–5 year high N leys, 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. An additional 20kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
b. An additional 40kgN/ha is permitted to milling wheat varieties.
c. An additional 15kgN/ha is permitted for every tonne that the expected yield exceeds the standard yield.
d. The spring application can be increased by up to 30kgN/ha if the expected yield is over 4.0t/ha.
e. An additional 15kg/N/ha is permitted for high N grain distilling varieties.
If actual local rainfall from 1 October – 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	170	150	100	60
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