Testimonials

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Deb Stokes and Jonathan Dick, Wellington, January 2008:
About a year ago, we were inspired by TV3's show 'Wasted' to start thinking about ways to reduce our rubbish & recycle. We came across Earthmaker whilst doing some net research into composting, and liked what we read on the site, it just seemed to make sense how they did it.
        We duly purchased an Earthmaker kit and quickly got it set up and going (assembly was simplicity itself).
The results were noticeable straight away. Prior to starting up with Earthmaker, we had at least two bags of household rubbish going out for collection each week. This is now down to one every week, and some weeks there are none. That's 52 less bags of rubbish to the landfill!
        Everything than can go into the Earthmaker does, and what can go in is surprising. Not just the usual fruit & veggie waste, but some papers, eggshells, tea bags and coffee grinds. It can also happily swallow two to three full catchers of lawn clippings. The organic waste breaks down quickly & efficiently, and following the instructions to keep it cycling over work really well.
        We are extremely happy with our Earthmaker, and would unhesitatingly recommend it to anyone.

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Terry Moore, writer, New Zealand Gardener magazine, September 2007:
Bins need to let air in - the famous Kiwi three-bin system is ideal.
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Alan Fielding, Resource Conservation Officer, Palmerston North City Council:
It is my personal and professional belief that the Earthmaker is the world's finest composter. I say this with 50 years of gardening and composting experience, an academic background in horticulture and considerable experience of over 50 of the world's composter technologies.
      Earthmakers excel because they are: successfully aerobic, continuous cycle, self turning, large in volume, quick acting, easy to use, requiring only a small operating space and very good value.
      Earthmaker is perfect for elderly and disabled people because of its ease of use and clever design.
      Earthmaker is good news for greenhouse gas reduction, soil husbandry, water conservation, garden quality, urban landscape, waste minimisation, healthier landfills and air quality within any country.
      Earthmaker is the ultimate composter. There is no serious competition. It is a brilliant New Zealand development.

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Consumer House and Garden, Issue 47 1998, pp 22-24:
Of the static types, the EARTHMAKER required the least back-straining effort, as material is mixed and pushed inside with a pole. [Push-Pull tool]
      If you ... seldom have enough to make a compost heap all in one go, the EARTHMAKER might be your option. It's a unique design with three compartments that hold compost at different stages of maturity, the least mature at the top. The upper ones are emptied into those below when they're full, in a continuous composting cycle.
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Garden Organic, (previously called HYDRA) 2006:
The HDRA Sustainable Waste management Team at Ryton in the UK completed a 26 week trial of Earthmaker versus traditional compost bins. Their report concludes that:
      Earthmaker: is easy to use; produces compost faster than traditional bins; produces over twice as much ready to use compost as traditional bins over the same period; is easy to empty.
To check out the full report in PDF format click here.
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Crown Research Institue /Hill Laboratories
Independent compost testing was conducted and supervised by an independent Crown Research Institute, with nutrient analysis performed by Hill Laboratories Ltd, in 2002.
     Compost from your Earthmaker will vary as the composition of material varies from one household to another. This analysis provides a guide to an "average" result for a family composting all their kitchen food scraps and most garden waste over a 16-week period. During the test approximately 70% garden waste and 30% kitchen waste by volume was fed to the Earthmaker. By weight the mix was nearer 50/50.
     The scientific tests measured toxicity, heavy metal analysis, nutrient content and plant growth against recommended standards for commercial compost. The results show that the Earthmaker compost is safe, nutritious and has a very positive effect on plant growth. It meets and exceeds the requirements of the NZ Compost Standard.  

     THE ONLY COMPOST YOU CAN TRULY TRUST IS THE COMPOST YOU MAKE YOURSELF.
     Over the 16 weeks, from mid-May to mid-September in the Auckland winter, 865 litres of garden clippings (54 litres per week) and 370 litres of heavy kitchen waste (23.1 litres per week) were added to the Earthmaker. Daily temperatures were recorded, with maximum in the top chamber reaching 44 degrees celsius whilst ambient minimum temperatures were 11 to 12 degrees.

Toxicity test

Germination
%

Root score

Control bark

94

3

Mature compost from Earthmaker

94

3

Comment
The sample was non-toxic. The NZ Compost Standard requires a germination of at least 75% and a root score of at least 2.

Nutrient analysis

Earthmaker
compost

Standard
requirement

Moisture
PH
Conductivity
N as Ammonium
N as Nitrate
Total carbon
Total nitrogen
Carbon/nitrogen ratio
Total phosphorus
Total potassium
Total sulphur
Total magnesium
Total sodium
Total iron
Total manganese
Total zinc
Total copper
Total boron

All results satisfactory

71.3%
8.0
3.92mS/cm
1.0 mg/l
118mg/l
34.0%
2.15%
16:1
0.40%
1.52%
3.11%
0.32%
0.26%
3820mg/kg
182mg/kg
231mg/kg
37mg/kg
64mg/kg

-
5-8.5
less than 5.0
less than 200
greater than 5

*Heavy metal analysis

Arsenic
Cadmium
Chromium
Mercury
Nickel
Lead

*Limits for sludge to be added to arable land.

Earthmaker compost

9mg/kg
0.6mg/kg
10mg/kg
0.2mg/kg
5.0mg/kg
100mg/kg

Ministry of
Health limits*
15
15
1000
10
200
600

Plant growth index (PGI)

Tomato seedlings were grown in a controlled environment at 20c for four weeks.

Weight of plants grown in 50% sand/ 50% Earthmaker compost mix (mean) = 28.2 g.

Weight of plants grown in sand only (mean) = 1.22 g.

PGI (28.2 divided by 1.22) = 23.1 THIS IS AN EXCELLENT RESULT