If humans wish to win the battle against climate change and slow down global warming so it does not exceed the threshold of a 1.5°C increase on pre-industrial levels, then there really is still much to be done. One reason being because so much time is being spent talking about the subject and so little time actually taking positive action – and the window of opportunity is gradually closing. Which is why it is all the more important to look at the question of carbon stores from as many different angles as possible. One of them can be found below our feet. What many people don’t realise is that soil is our planet’s biggest carbon store alongside our oceans. And one that we can actually enhance. And this is where we come into play.
REMONDIS’ subsidiary RETERRA transforms biomass into a number of products including quality-assured composts that not only help to add nutrients to farmland but also to build up the humus content of the soil. Humus, in turn, is a perfect carbon store. By deliberately using compost, therefore, it is possible to increase the ability of soil to capture carbon and so curb climate change.
This gave us the idea of developing a tool for farmers that would enable them to work out exactly how the most could be made of the potential of their soil. No easy task. Working out the maximum amounts of carbon that can be stored in the soil depends on a whole host of factors such as the type of soil, land management, crop rotation, temperatures and rainfall. We decided to call on someone to help us – someone who knows more about calculating complex models than anyone else: the Fraunhofer Institute.
Not only spaces untouched by human activity like moors and uncultivated land act as carbon stores. Cultivated places such as farming and forestry land do, too. One important fact here: the greater the humus content, the more carbon can be stored.
Taking all the parameters mentioned above into account, CarboSoil, the tool developed by the Fraunhofer Institute scientists, is able to calculate the amount of carbon stored long term in the soil. The tool is used and fed with the necessary information by the experts from RETERRA. At the end of the process, the farmers are not only given recommendations on how to manage their land in the most climate-friendly way but also receive concrete figures on how they are helping to combat climate change. And this for each individual parcel of land. Indeed, this tool has huge potential as it can also be used to provide farmers with written proof about the concrete CO2 savings they have achieved on their farm.
For all those interested in the details: find out more about the CarboSoil’s calculation basis
Using fertiliser to enrich soils and help the climate at the same time – this is possible with quality-assured composts
The so-called ‘4 per 1000 Initiative’ was agreed on during the Paris Climate Conference back in 2015 – with the German government being one of the first signatories. The goal of this initiative is to increase humus content in soils all around the world. The reason for this campaign – as its name implies – is the fact that a growth rate of 0.4% in the soil carbon stocks in humus would compensate for all carbon emissions related to human activities. This alone highlights the huge potential of humus to protect our climate. A potential that the very most should be made of. For everyone’s future as well as for our climate.
Find out more about the 4 per 1000 Initiative at openagrar.de
83,000 tonnes of carbon could be stored every year simply by using RETERRA composts to enrich humus content in soils. This is the same amount of CO2 typically emitted by more than 2,500 4-person households in Germany.
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