Home Gardeners Barrel Compost Trial

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Deb Cantrill and members of the Adelaide Hills Biodynamic Group.

AIM

– To investigate if it is possible to make a smaller version of barrel compost (also known as cow pat pit) so home gardeners can easily make their own.

Investigate the possibilities of using other manures to bring in a range of animal influences into the home garden.

METHOD

Literature search on methods used worldwide.

Set up 3 different sized composts in 3 different sized bottomless containers. Unglazed terracotta pots where chosen because they could easily fit into a home garden and are also durable. The bottom is simply removed with an angle grinder. There is also a possibility of making a container to suit. They are easily removed when compost is complete allowing the space to be planted. Peter Proctor was using clay bricks in India.

Cow manure	Egg shells	Rock dust (Fisher creek)	Biodynamic preps	Container
50 litres	200 grams	500 grams	4 sets 8 gams	1/2 wine barrel 63 x 45x 56 cm
25 litres	100 grams	250 grams	2 sets 4 grams	Terracotta pot 47 x 30 x 38 cm
12 litres	50 grams	125 grams	1 set 2 grams	Terracotta pot 40 x 30 x 28 cm

The process started on May 2nd 2009.Cow manure was collected from Claret Ash Farm. The manure was measured out. The 3 portions then had the egg shells and rock dust added and where ‘kneaded by hand for 1 hour.

Mixed by 5 people. Each mixed 10 litres for a time and then passed it on repeated for the hour.

Mixed by 2 people—1/2 each kneaded for 1 hour.

Mixed by 1 person for 1 hour.

After the hour each was placed in its appropriate container, biodynamic preparations added, covered with a damp sack & waterproof lid.

JUNE 4th 2009 All 3 pits were inspected and mixed well with a fork. All looked much the same—the smallest was a little wetter & middle one a little dryer but after mixing the moisture evened out. The tops where smoothed and sack and waterproof lids replaced.

AUGUST the pits were inspected. The smallest compost was ready and removed to storage. The others left to mature a little more. The 25 litre compost was ready two weeks latter. The 50 litre compost is still developing but very close. 14/9/2009

CONCLUSION

All 3 pits matured displaying the same properties of humus development. Highly recommend that home gardeners use this method to produce their own therefore always having their own supply at hand.

FUTURE

Adelaide Hills Biodynamic Group is planing to run this trial again in Spring to investigate the seasonal effect. 10 litres of manure will be used in the small barrel, making an easy 1 bucket measurement. It is also hoped Home garden members will quickly take up the method.

Next autumn we will plan a trial using different mixes of manure to bring a more diverse range of animal influences to the home garden.

Deb Cantrill is an experienced biodynamic orchardist, gardener and educator. Establishing Nirvana Organic Farm in 1983.Deb is the Coordinator and preparation maker/distributor for the Adelaide Hills Biodynamic Group.

Adelaide Hills Biodynamic Team: Chris Banks, Jan Sedunary, Robin Tait, Simon Martin, Martin Fry, Wendy Morris, Yi-Ting Wu, Cathy Smallridge.

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Fact Sheet

Home Garden Barrel Compost

Also known as cow pat pit, ccp or manure concentrate.

Barrel compost activates the soil and soil organisms, encouraging better soil structure and quicker breakdown of inorganic and organic substances. It is used to spread the ‘compost’ influences especially when converting farms.

Background

The development Barrel compost grew out of concern with pollution of Strontium 90 s from atmospheric atomic bomb tests in 1958. Maria Thun and Dr Ehrenfried Pfeiffer collaborated trialing various substances then cultivating plants. An unambiguous result was obtained by growing plants with eggshells and ground basalt; the plants did not incorporate or store any radioactive Stontium90. They then set about a way to bring these two substances to the biodynamic farm. Further experiments and trials saw the development of the barrel compost.

Peter Proctor has developed its use especially on larger farms in Australia and NZ where there is little compost used. In India he has developed wide usage of the preparation. Although the barrel compost is made in a similar fashion all around the world the quantities of compost preparations, egg shells and basalt used vary although the amount of manure was around 50 litres End uses also vary see table below.

Very little is written about its use in the home garden. Deb Cantrill recommends it use for home gardeners on compost heaps, worm farms and to make the whole garden ‘compost’ by guiding the breakdown process especially where heavy mulch are used to protect the soil from heat and dryness. Many of the uses in the table below are also applicable.

Home Garden Barrel Compost.

*This was developed by Deb Cantrill and the Adelaide Hills Biodynamic Group to encourage and enable home gardeners to have their own supply thus increasing its frequency of use on the home garden.

To make the Home Garden Barrel Compost

• Bottomless Container* Terracotta pot with bottom cut out.
• 10 litres (1 bucket) good quality firm cow manure
• 1 x 2gram biodynamic compost set
• 125gm Fine rock dust e.g. fish creek
• 50 gm ground egg shells

Method

1. Dig a hole 150cm deep and place bottomless container in hole and back fill up sides of container.
2. Mix cow manure, rock dust and egg shells using a hand kneading action for 1 hour. You will observe quite a change.
3. Place manure mix in container, add compost preparations as per usual.
4. Cover manure with a damp hession sack.
5. Cover container with waterproof lid.
6. After 1 month fork over manure, smooth out and cover again.
7. Check every 4 weeks or so. It should be ready in 3 months.
8. Remove to storage container and store as per 500.

Preparing the Barrel Compost for use

CCP is generally applied in the afternoon. For a home garden take 20gm and place in 5 litres warm water. Stir as per 500 for 20 minutes and apply to selected area as per 500.

Applications

Application	benefits	Stir	timing	rate	source
Soil spray	Influence of compost preps during conversion	At least 15m 1hour 20 min	Afternoon Afternoon 3x Afternoon	1kg /40l per acre 100g/portion 500 60g/10litres 20gm /5litres	PPI PPN MTL AHBG
In conjunction with stirring 500.	Getting effects of 502/507 over the land	Last 15 min of stirring Last 20min	Afternoon Afternoon	100grams per acre 50g per gal	PPI BAA
Used on the soil around all fruit trees	as a soil inoculants or soil conditioner		Before mulching trees	1kg/40 litres per acre	PPI
Foliar feed on all fruit trees	Strengthen the plants against possible fungus or insect attack		Every 14 days before and after flowering	1kg/40 litres per acre	PPI
Tree paste on bark of fruit trees	Strengthen the bark. This can bring good soil micro organisms up onto the tree			1kg/40 litres per acre	PPI BAA
Dip roots of all young trees, shrubs or grapes prior to planting	Encourage new root development			1kg/40 litres per acre	PPI
Soak seeds prior to sowing	Encourage root development		Soak for 30 minutes, dry off , sow immediately	1kg/40 litres per acre	PPI BAA
Dip seed potatoes before planting	This seems to protect the potato against blight		Dip potatoes and dry before planting.	1kg/40 litres per acre	PPI
Soak cuttings	Assist root development		Soak overnight prior to planting	1kg/40 litres per acre	PPI BAA
Inoculate compost heap			Poured into holes along top of the heap. Or Sprinkled into successive layers while building the heap.	1 kg/40 litres for each 5 meters of compost	PPI
Liquid manures	Add compost preps influence		Stir 10 minutes	1kg/45litre/acre	PPI PPN
Used as one component of the sequence of BD sprays of 500,501,502/507 and 508	Brings the effect of all the preparations onto the land over a short period. Gives Strength and quality to plants			1kg/40 litres per acre	PPI
When green manures are turned in	Add compost preps influence- guide breakdown and humus formation.		1x		MTL BAA
When compost is applied			1x		MTL
On winter furrows			1x		MTL
Inoculants in dairy shed effluent, mainly with flowforms	Add compost preps influence- guide breakdown and humus formation.	20 minutes		240g /40 litres/ 1 bucketful per 5,000 litres 1kg/1weeks effluent/100 cows	BAA PPNZ
Compost tea	Brings in bacteria & fungal activity- humus + trace elements + soil life	20 minutes	150g per ha for smaller areas, 75g per ha boardacre		BAA

BAA Biodynamic Agriculture Australia

PPNZ Peter Proctor various NZ publications

PPI Peter Proctor ‘Biodynamic agriculture in India’

MTL Maria Thun ‘Gardening for Life’

AHBG Adelaide Hills Biodynamic Group.

*See HOME GARDENERS BARREL COMPOST TRIAL . Adelaide Hills Biodynamic Group