How much stone do I need?
How much stone do I need for the ground?
For pebble and gravel:
• approximately 80kg per m², based on a 5cm layer.*For particle sizes >32mm, a thicker layer is required.
• Consumption per sack: 1000kg = 0.625m³.
• Coverage: approximately 12.5m² with a 5 cm layer.
For pine bark:
• approximately 70L per m², based on a 5cm layer.
• Consumption per sack: 1000L = approximately 1m³ = approximately 600kg
• Coverage: approximately 14m² with a 5 cm layer.
For volcanic, slate and chamotte:
• approximately 50kg per m², based on a 5cm layer.
• Consumption per sack: 1000kg = approximately 1m³
• Coverage: approximately 20m² with a 5 cm layer
How much stone do I need to fill a gabion?
Density of approximately 1,650kg per 1m³.
The calculation is very easy to understand with an example: if you have a gabion of 100x50x30 cm, you must do the following calculations:
1x0.5x0.3 = 0.15m³
0.15x1,650 = 247.50kg of stone.
*It is always a good idea to calculate an extra 5%, since when gabions are filled they expand a little and a little more stone always fits than in the theoretical calculations.
Clarifications
ATTENTION!
The grain sizes of GRAVELS AND pebbles are sieve sizes
The actual sizes may vary slightly, since when talking about, for example, 60-80mm stone, it means that the stones pass through an 80x80mm square mesh and do not pass through a 60x60mm one.
Through that 80x80 mesh, a stone 100mm long and 65mm wide can pass, so there may be a percentage of stones larger than 80 and smaller than 60mm.
Breakage of pebbles
On the other hand, in pebbles larger than 60mm, there is a percentage of up to 10% of stones that can break during sorting, washing, loading and unloading; to this day we do not have machinery that prevents such breakages.
In the photos you can see, only real products are shown; broken pieces have not been removed.
Dust and sand in the products
This product is not washed, so it contains dust, sand and even traces of other products due to processing and transport. This is not a problem when using it; the stone will wash itself over time or you can pour water on it before using it.
Volcanic Lava Flour
Powerful mineral fertilizer
Rich in trace elements, silicon, calcium, and magnesium. Enhances the soil of your crops.
The foundation of agricultural production is the soil; in recent years we have focused on "feeding" the crops and have forgotten about the needs of the soil. Volcanic rock flour improves soil fertility and stimulates biological activity in the soil, resulting in fertile soil that yields good harvests regardless of the crop.
3Ms Organic Agriculture
Organic Matter - Microorganisms - Minerals
This is a simple model that has worked for millions of years; now, due to soil overexploitation, we must try to compensate for soil wear and the imbalance of the 3Ms, and this is where rock flours do their job, remineralizing the soil to achieve a perfect equation that allows for stronger and more productive crops.
Advantages of volcanic rock flour or pozzolana
- Universal mineral fertilizer, provides Silicon, Calcium, Magnesium, and iron among other 70 minerals.
- Revitalizes worn-out soils either due to the abuse of chemical fertilizers or continuous monoculture, causing the clay-humus complex.
- Soil regenerating agent, loosens soils, improving their structure for greater crop growth, especially in clayey and compact soils.
- Increases soil pH, reduces the content of exchangeable acid cations, increases the cation exchange capacity of the soil, and increases the content of basic cations in the soil.
- Protects against pests and diseases.
- Retains and conserves moisture
- Its acids dissolve the minerals already present in the soil, which the crops utilize.
- Prevents nitrogen losses
Chemical composition of volcanic rock powder for agriculture:
It has a stabilized pH between 5.5 and 6.
| Calcium Oxide | CaO | 12.14% |
| Silicon Oxide | SiO2 | 43.04% |
| Aluminum Oxide | Al2O3 | 12.6% |
| Iron Oxide | Fe2O3 | 13.38% |
| Magnesium Oxide | MgO | 10.74% |
| Sulfur Oxide | SO3 | 0.33% |
| Potassium Oxide | K2O | 1.67% |
| Sodium Oxide | Na2O | 0.35% |
| Titanium Oxide | TiO2 | 2.75% |
| Loss on Ignition | L.O.I | 2.87% |
| Reactive Silica | SiO2R | 27.68% |
Granulometry of rock flour
We have several granulometries, 0-1 mm. and micronized volcanic stone flour.
The micronized rock flour is more expensive but compensates as it reduces the amount needed to have a higher contact surface than the 0-1 mm granulometry.
Amount of volcanic rock flour to apply
In the case of application by sprinkling with micronized rock, 200 grams per 1 m² is sufficient, (2 tons per hectare); in the case of 0-1 mm rock flour, about 400 grams per m² (4 tons per hectare) will be necessary. If applied directly to the plant, we can reduce the required amount by half.
Application through irrigation water, only use micronized rock flour, mix and apply with continuous agitation machine.