So just how good is AD compost?

Doing it for the kids

Member
Arable Farmer
Like many I am sure, I can get AD compost locally.

I am about to do some garden works at home which include new beds / boarders and new hedges. new veg garden on the cards too.

our dirt is tough stuff with a lot of clay in, we are stripping top soil else where which I can bring in to enhance beds but I was wondering what (if any) disadvantages there are in using AD compost to help as a conditioner / slow release fert?

screen shot of an analyse here:

1610632543789.png


1610632577880.png


it seems on the face to be good stuff. I imagine there may be some plastic / bottle tops etc which we have seen before which I think I can live with. Its quite course in comparison to a garden centre compost but if I blend with top soil it feels like a good value solution.

what will the weed count be like, I don't think the AD process kills all of them?

advice very welcome, I'm not this scientific but when compared to other examples it seems to hold its own!
 

sjt01

Member
Mixed Farmer
Location
North Norfolk
Like many I am sure, I can get AD compost locally.

I am about to do some garden works at home which include new beds / boarders and new hedges. new veg garden on the cards too.

our dirt is tough stuff with a lot of clay in, we are stripping top soil else where which I can bring in to enhance beds but I was wondering what (if any) disadvantages there are in using AD compost to help as a conditioner / slow release fert?

screen shot of an analyse here:

1610632543789.png


1610632577880.png


it seems on the face to be good stuff. I imagine there may be some plastic / bottle tops etc which we have seen before which I think I can live with. Its quite course in comparison to a garden centre compost but if I blend with top soil it feels like a good value solution.

what will the weed count be like, I don't think the AD process kills all of them?

advice very welcome, I'm not this scientific but when compared to other examples it seems to hold its own!
AD should kill weeds - there are some studies on the WRAP website. Be a little careful not to use it too concentrated, as it tends to contain highish levels of plant growth hormones which can be a problem if too much is present, but good in small quantities.
 

nick...

Member
Arable Farmer
Location
south norfolk
From what I understand the digestion process does not run hot enough to kill black grass seed.heard this from a few people so assuming it’s true.has anyone had some spread and then get an infestation of black grass
nick...
 

vinnie123

Member
Location
dorset

This is from a digester local to us
 

GeorgeK

Member
Location
Leicestershire
I think it's a good idea, however I question whether the eco credentials are as great as they suggest. Bloomin Amazing use maize for AD but if the digestate goes to gardens as compost the farmland is stripped of organic matter and nutrients. I don't think growing maize for AD and not getting digestate back is particularly sustainable personally. I appreciate the percentage going for compost will be relatively small overall, but the sustainable concept isn't without flaws
 

delilah

Member
I think it's a good idea, however I question whether the eco credentials are as great as they suggest. Bloomin Amazing use maize for AD but if the digestate goes to gardens as compost the farmland is stripped of organic matter and nutrients. I don't think growing maize for AD and not getting digestate back is particularly sustainable personally. I appreciate the percentage going for compost will be relatively small overall, but the sustainable concept isn't without flaws

agreed, I would have digestate from a farm plant using slurry, chicken muck etc, but as you say growing crops for it is dubious on environmental and moral grounds.
 

The Son

Member
Location
Herefordshire
A lot of the local gardiners come and pick up our separated digestate for their gardens, they love it, it has spread by word of mouth. In one village about five miles away in the hills I have a number of green fingered ladies that have 12 tonnes a year each!
Mine is farm based no waste plant though.
 

Hindsight

Member
Location
Lincolnshire
Never mind the analysis, what is the feedstock ? If it is from a farm AD plant with known feedstock then fine. If it is municipal waste/ sewage plant then wouldn't touch it with a barge pole, especially as you mention veg patch etc. The waste industry is using farmland as a dumping ground.

1 Municipal waste - same opinion if it is composted, rather than through an AD plant? A waste being dumped on farm land

2 If as sounds you consider this 'waste' should not be dumped on farmland, I presume you prefer landfill.
 

delilah

Member
1 Municipal waste - same opinion if it is composted, rather than through an AD plant? A waste being dumped on farm land

2 If as sounds you consider this 'waste' should not be dumped on farmland, I presume you prefer landfill.

Having for many years run a kerbside collection scheme for kitchen and garden organics, I've a fair understanding that there is compost and there is compost. From a genuine source separation scheme then I would contemplate it. However the way the job has gone, with wheely bin systems that allow no visual inspection and CA site green bins having all manner of crap being thrown in them, no I wouldn't have it on farmland. Sewage sludge, I would say the microplastics is a ticking time bomb.
Use it under turf on landscaping projects, as land raising on former landfill sites to plant trees on, plenty of needs for organic material.
 

Hjcarter

Member
Horticulture
Location
Leicestershire
Just had a 12t load to try in the alleys in our orchard where we need organic matter to stop the ground draining so quickly.

We got 10 to 30 grade compost, there's loads of coarse material in it and the odd 18in lump of wood and bit of wire.

It'll probably do for what I want but will require walking and cleaning up when its been spread. 0 to 10 would have been better but costs way more.

Preference would be digestate but don't know who's got one round here.
 

The Son

Member
Location
Herefordshire
Just had a 12t load to try in the alleys in our orchard where we need organic matter to stop the ground draining so quickly.

We got 10 to 30 grade compost, there's loads of coarse material in it and the odd 18in lump of wood and bit of wire.

It'll probably do for what I want but will require walking and cleaning up when its been spread. 0 to 10 would have been better but costs way more.

Preference would be digestate but don't know who's got one round here.
Where are you?
 

delilah

Member
and bit of wire.

Only takes one to kill a cow.
I hope that arable farmers, who have made themselves available to the waste industry in this manner, don't regret it as they seek to bring livestock back into their rotation.
Everyone quite rightly gets uppity about Chinese lanterns. Same should be true of what we ourselves put on our land.
 

Hjcarter

Member
Horticulture
Location
Leicestershire
Only takes one to kill a cow.
I hope that arable farmers, who have made themselves available to the waste industry in this manner, don't regret it as they seek to bring livestock back into their rotation.
Everyone quite rightly gets uppity about Chinese lanterns. Same should be true of what we ourselves put on our land.
Couldn't agree more, I'd never put livestock on it!
 

S J H

Member
Livestock Farmer
Location
Bedfordshire
Have you got a green waste compost site nearby? That’s what I’ve been using on our garden, I think it’s the second grade screened and it’s been very clean.
 

Brisel

Member
Arable Farmer
Location
Midlands

This is from a digester local to us

Is it all separated? JV Farming do put all the liquor back on the land used to grow the feedstock. There are always tankers on the roads around Dorchester.
 

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