Galuku CPRM8/3P
Laboratory No. 02/029, received 05/2/2002
Water content as received: 20% of wet weight = 24.5% on a dry weight basis
Loss on ignition - Organic matter: 92.5% of dry matter
Water holding capacity - at 0.4m suction: 473% on a dry weight basis
Total weight of moist cocopeat and content of organic matter, when measured out in a small container and lightly packed; grams/litre = kg/m3
| |
Total weight (20% water)
g/l (kg/m3) |
Organic matter
g/l (kg/m3) |
| Container filled loosely: |
72 |
54 |
| Container dropped 2x10cm: |
80 |
59 |
| Container dropped 5x10cm: |
84 |
62 |
Mixing sand and cocopeat at a rate of 0.9m3 sand (1,170kg) to 0.1m3 cocopeat (8.0kg), will result in a content of organic matter of 0.51% on a dry weight basis.
The water holding capacity of this mixture is expected to be 3.9% higher than that of sand alone, measured on a volume basis.
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RootZone Laboratories Soil Testing Service
Supplied by: Unimin
Laboratory No.: 02/064
Reference: ACI Sports 40 sand
Sample Origin: Unimin
Date Received: 15th April, 2002
Intended Use: Mixes with cocopeat
| Tube No. |
No. of Drops |
Bulk Density |
Hydraulic Conductivity |
| 1 |
1 |
1.510 |
1220 |
| 2 |
2 |
1.570 |
960 |
| 3 |
4 |
1.584 |
790 |
| 4 |
8 |
1.652 |
650 |
| 5 |
16 |
1.705 |
530 |
| 6 |
32 |
1.701 |
430 |
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Cocopeat Conductivity - 10%
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Cocopeat Conductivity - 15%
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The CPRM8/3P cocopeat was tested and compared with a sample of TM sphagnum peat.
A summary of the results is as follows:
| |
CPRM8/3P Cocopeat |
Sphagnum peat |
| Organic matter, % of dry matter |
92.5 |
98.4 |
| Water content, as received - % of wet weight |
20 |
48 |
| Water holding capacity at 0.4m suction, % on a dry weight basis |
473 |
433 |
| Organic matter content of a 10% by volume mix with sand, % |
0.51 |
0.46 |
| Increase in water holding capacity of a 10% by volume mix, % by volume |
3.9 |
3.0 |
| Hydraulic conductivity of a 10% by volume mix with sand after compaction, mm/hr |
390 |
440 |
USGA guidelines, whilst recommending the use of organic matter in root zone mixtures, no longer specify a minimum organic matter percentage. The guidelines do, however, specify a minimum organic matter content for peat of 85% by weight as determined by loss on ignition. Both samples tested easily pass this requirement.
As a guide, the cocopeat is suitable for mixes of 10% by volume when used with a USGA type sand, however, all proposed root zones should be thoroughly tested before use.
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