Matt Taylor, ADAS

1. HOW WILL THE DIGESTATE MARKET DEVELOP?
CHAIR:
DR DAVID TOMPKINS, WRAP
PANEL:
ANNA BECVAR, EARTHCARE TECHNICAL LTD
DR NICK CHEFFINS, PEAKHILL ASSOCIATES LTD
DR PAUL GIBBS, 4R GROUP LTD
MATT TAYLOR, ADAS UK LTD

2. Recycling of digestate toagricultural land
Matt Taylor
www.adas.uk

3. Organic materials analyses
Units
Cattle slurry
Manure- based digestate
Crop (maize) based- digestate
Fibre crop (maize) based- digestate
Application rate
t/ha or m3/ha
30
30
30
40
Norfolk
Dry matter
%
7
5
8
16
pH
7.8
8.2
8.1
8.3
Total N
kg/ha
90
98
142
230
Ammonium-N
kg/ha
52
59
77
6
Gleadthorpe
Dry matter
%
7
8
8
22
pH
7.5
8.3
8.3
8.5
Total N
kg/ha
91
112
180
270
Ammonium-N
kg/ha
56
59
163
121

4. Ammonia emissions following organic material applications at Wensum(31 August 2011 )
P<0.001
* Incorporated within 24hours
*
*
P<0.001
Digestate stayed in a band; ‘slow’ infiltration

5. Ammonia emissions following organic material applications at Wensum(22 February 2012 )
0.05
P<0.05
Digestate did not stay in a band (ponding); ‘rapid’ infiltration

6. Wensum -winter wheat (2012): N use efficiency (% of total N applied)
Yield method

7. Organic material use of farm
•Know what you are applying:
–laboratory analysis
–predict crop available nutrients
•Apply accurately and evenly:
–precisionapplication machinery
•Make best use of nutrients:
–integrate into farm nutrient management plan
–reduce bagged fertiliser accordingly
Note:As for most organic material applications, consult the purchaser of your crop regarding any possible restrictions on use

8. The Renewable Fertiliser Matrix (an exert)
Cropping category
BSI PAS110 digestate
Pasteurised1
Non-pasteurised
Fresh produce
Group 1

Before drilling/ planting2

NOT within 12 months of harvest and also at least 6 months before drilling/ planting2
Group 2

Before drilling/ planting2

NOT within 12 months of harvest and also at least 6 months before drilling/ planting2
Group 3

Before drilling/ planting2

NOT within 12 months of harvest and also at least 6 months before drilling/ planting2
Combinableand animal feed crops

5

5
Grassland and forage -grazed

Statutoryno-graze intervals apply4

4 week no grazing period applies
Grasslandand forage -harvested

Statutoryno-harvest intervals apply4

4 week no harvest period applies