I am using three levels of biochar for my experiment
1. 20 g biochar per kilogram soil
2. 40 g biochar per kilogram soil
3. 60 g biochar per kilogram soil
Now I want to covert it into ton (s)/ha
Thanks
I would guess that this would be difficult to answer, since it will depend on local factors. How deep is the soil-depth? Is it uniform over one hectare? Which materials are the soil made out of, is it porous or tightly packed? I would assume that whatever answer can be discern from the above will have a large range of uncertainty, correct me if I'm wrong.
We often consider 6 inches or 15 cm for depth of soil for most of the field crops cultivation. I agree with you it also depends on the uniformity and parent material of soil but My question is about average basis.
Mukesh Kumar Soothar considering you are planting vegetable at a depth of 40 cm
first you calculate the volume of the area if you are saying 1 hectare this could mean 100 meter X 100 meter X 0.4 meter
the volume would be 4000 cubic meter then you multiple it with the density of the soil
each type of soil has a density
clay soil density is 2000 kg/m3
the result will be 8000000 kg convert it to tonne (just make sure what you want, the metric tonne or the us ton )
to calculate the biochar quantity example 20 g/kg of soil
multiply 8000000 kg of soil by 0.02 kg of biochar = 160000 kg of biochar
convert it to tonne
you are welcome
I appreciate Dr Wael Yammine for his elaborate explanation. Thanks him a lot and this would be useful enough for so many purposes.
Soil (kg/ha) = Area X Depth (m) X Soil Bulk Density (g/cm3)
Average soil BD = 1.49 g/cm3
Soil area = 1 ha = 10000 m2
Plough depth = 15 cm = 0.15 m
=10000 m2 X 0.15 m X 1.49 g/cm3
=1500 m3 X 1.49 g/cm3
1 g/cm3 = 1000000 g/m3
=149000 g/m3
=1500 m3 X 149000 g/m3
=223500000 g
= 223500 kg
= 2.24 X 10^6 kg/ha
The post by Brobst illustrates the usual calculations. If instead, one considers 15 cm of topsoil usually described at the "tillage depth", that is 2,000,000 kg or 2,000 mt/ha. For varied bulk density the calculation would vary, but that is hardly needed for most agricultural calculations.
20 g biochar/kg soil = 2% biochar. That would be 20 t biochar/ha. A very expensive choice for a soil amendment. Biochar is not a "miracle" amendment that makes that cost a necessary improvement for farm soils. For remediation of contaminated soils, the biochar may be a valuable and needed amendment.
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