Nutrient Management Planning

2

N Nitrogen

P Phosphorus

K Potassium

………NO3 Nitrate

………P2O5 Phosphate

………K2O Potash………

Nutrients needed by grass and crops for growth

3

Nutrient Management PlanningGetting the balance right!

Nutrients In

Nutrients Out

4

Why manage nutrients?

1. Potential to reduce fertiliser costs

2. Protect the environment

3. Meet Nitrates Directive requirements

5

2. Protect the environment

Nutrient loss – phosphates and nitrates

1. Slurry & fertiliser runoff

2. Leaching through the soil

3. Soil particle loss

Causes nutrient enrichment (eutrophication)

6

3. Meet Nitrates Directive requirements

• Must show that any chemical P fertiliser used is needed by the crop:– Soil Analysis– P recommendation for the crop

• Must show that any chemical N fertiliser that is used for crops other than grass is needed by the crop:– Soil N supply index– N recommendation for the crop

7

Step 1 - Soil sampleStep 2 - What does the soil analysis mean?Step 3 - Estimate Nitrogen requirementsStep 4 - What nutrients does the crop require?Step 5 - How much nutrient can be supplied by

organic manures?Step 6 - Which chemical fertiliser can supply the

remaining nutrients required

C. How is it done?

8

Soil

• Valuable source often overlooked.

• Amount of nutrients depends on soil type, rainfall and previous management

• How to find out what’s in soil?− Soil sampling− Soil analysis

9

Mr AN Other

Somewhere

Report generated on: 07 March 2008

Date Received: 29 February 2009

pH Texture Lime Requirement Phosphorus Potassium Magnesium

Lab No./

Reference

Arable

t/ha

(t/acre)

Grass

t/ha

(t/acre)

mg/l

(index)

mg/l

(index)

mg/l

(index)

400-2008

Soil

1-19-60 Field 4

6.1 SZL

(Sandy silt loam)

4.00

(2.00)

0.00

(0.00)

20.0

(2)

216

(2+)

102

(3)

Farm Survey & Field Number

pH Texture Lime requirement for arable & Grass

Soil Analysis Laboratory Report

10

Soil pH, nutrient availability and plant growth

Plant Growth

Nutrient Availability

11

4.5 5.5 6.5 7.5 8.5

Potatoes

Grass

Cereals

Soil pH range for optimum crop growth

pH

Lime is used to improve acidic soils

(raise low pH soils)

12

N Requirements for some Arable crops (kg/ha)Pages 68- 69 NAP Guidance Booklet

SNS1 SNS2 SNS3

W. Wheat 220 190 160

W. Barley 170 140 110

W. Oats 120 90 60

W. O.S.Rape 190+30* 160+30* 120

S. Barley 140 110 70

S. Oats 110 70 40

S. Wheat 180 150 120

F. Maize 100 50 20 * +30 in the seedbed

13

Step 5 -Nutrient Content of Slurry & Manure (kg/m3)

6% dry matter

2.42.03.0 4% dry matter

3.21.22.3 6% dry matter

3.21.23.0 6% dry matter

K20P205NLivestock Type

181633 Broiler litter (60% Dry Matter)

14

This Calculation on paper for Nitrates Records

Page 43

15

Crop Nutrient Recommendation Calculator (www.dardni.gov.uk)

• Determine N, P2O5 and K2O required by crops;

• Calculate the amount of nutrients supplied by organic manures,

• Select the correct chemical fertiliser and application rate,

• Retain information required for record keeping.

16

17

`

18

19

20

21

22

23

24

AN Other

25

29

AN Other

30

31

How to access calculators?

• Go to dardni website at www.dardni.gov.uk

• If not registered, click New User? Sign up now and follow instructions

• Once registered, click Online Services and select Secure online Services

• Select Farm Nutrient Management Calculators