ARCHIVE: Fertiliser Manual (RB209)

Cattle, pig, sheep, duck or horse farmyard manure – total and available nutrients

Nitrogen – typical total and readily available nitrogen contents (fresh weight basis)

    

'Old' FYM ex-storagea  

'Fresh' FYMb

  

Dry matter (%)

Total nitrogen (kg N/t)

Readily available nitrogen (kg N/t)

Readily available nitrogen (kg N/t)

Cattle farmyard manure

25

6.0

0.6

1.2

Pig farmyard manure

25

7.0

1.0

1.8

Sheep farmyard manure

25

7.0

0.7

1.4

Duck farmyard manure

25

6.5

1.0

1.6

Horse farmyard manure

30

7.0

ND

ND

ND = no data
a. FYM that has been stored for 3 months or more
b. FYM that is spread straight from the building

For cattle FYM from organic farms, dry matter and total nitrogen contents are the same as in the table above. However, the readily available nitrogen content of FYM (ex – storage) is 5% of the total, i.e. 0.3 kg/t. For further information see Booklet 4 of the Managing Livestock Manures series.

Duck farmyard manure is included here because the availability of its nitrogen is generally lower than that of other poultry manures.
To convert kg/t to units/ton, multiply by 2.

Nitrogen – percentage of total nitrogen available to next crop

 

Autumna (Aug-Oct, 450 mm rainfall to end of March)

Wintera (Nov-Jan, 250 mm rainfall to end of March)

Springa (Feb-April)

Summera use on grassland

 

Sandy / shallowb

Medium / heavyb

Sandy / shallowb

Medium / heavyb

All soils

All soils

Surface applied (i.e. not soil incorporated)            
FYM (old and fresh)

5

10

10

10

10

10

Soil incorporated 24 hrs after applicationd            
FYM            
- Old

5

10

10

10

10

N/A

- Freshc

5

10

10

10

15

N/A

N/A = Not available

a. The nitrogen availability estimates assume 450 mm of rainfall (after autumn application) and 250 mm (after winter application) up to the end of soil drainage (end March). Where rainfall differs from these amounts, intermediate values of nitrogen availability should be used. For spring or summer applications, rainfall is not likely to cause movement of agronomically important amounts of nitrogen to below crop rooting depth.
b. Sandy/shallow = light sand soils and shallow soils (see Appendix 1) Medium/heavy = medium, deep fertile silt and deep clay soils. Use this category for organic and peaty soils.
c. Fresh FYM – manure which has not been stored prior to land application and has an estimated ammonium-N content of 20% (cattle and sheep FYM) or 25% (pig and duck FYM) of total N. Old FYM – manure which has been stored for 3 months or more and has an estimated ammonium-N and nitrate-N content of 10% (cattle and sheep FYM) or 15% (pig and duck FYM) of the total N.
d. The values assume incorporation by ploughing. Cultivation using discs or tines is less effective in minimising ammonia losses and intermediate values of nitrogen availability should be used.

Phosphate, potash, magnesium and sulphur (fresh weight basis)

 

DM(%)

Phosphate

Potasha

Total S

Total Mg

   

Total phosphate
kg P2O5/t

Availability %

Available
phosphate kg P2O5/t

Total
potash kg K2O/t

Availability %

Available
potash kg K2O/t

kg SO3/t 

kg MgO/t

Cattle FYM

25

3.2

60

1.9

8.0

90

7.2

2.4

1.8

Pig FYM

25

6.0

60

3.6

8.0

90

7.2

3.4

1.8

Sheep FYM

25

3.2

60

1.9

8.0

90

7.2

3.0

1.6

Duck FYM

25

5.5

60

3.3

7.5

90

6.8

2.6

1.2

Horse FYM

30

5.0

60

3.0

6.0

90

5.4

ND

ND

ND = No data
a. Values of potash may be lower for FYM stored for long periods in the open.
To convert kg/t to units/ton, multiply by 2.

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