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jeudi 14 mai 2015

Grassfed cattle is environmently friendly

One of the favored arguments of vegans about meat is not about your health but about the "future of the planet". Despite the fact that most of our predictions as humans revealed wrong about demography, economics, climate or science, they believed that meat production is a very important environmental issue which justifies avoiding meat and cattle production.
This paper explains clearly that they are wrong if cattle are grassfed.

Nat Commun. 2015 Apr 30;6:6995. doi: 10.1038/ncomms7995.

Emerging land use practices rapidly increase soil organic matter.


The loss of organic matter from agricultural lands constrains our ability to sustainably feed a growing population and mitigate the impacts of climate change. Addressing these challenges requires land use activities that accumulate soil carbon (C) while contributing to food production. In a region of extensive soil degradation in the southeastern United States, we evaluated soil C accumulation for 3 years across a 7-year chronosequence of three farms converted to management-intensive grazing. Here we show that these farms accumulated C at 8.0 Mg ha(-1) yr(-1), increasing cation exchange and water holding capacity by 95% and 34%, respectively. Thus, within a decade of management-intensive grazing practices soil C levels returned to those of native forest soils, and likely decreased fertilizer and irrigation demands. Emerging land uses, such as management-intensive grazing, may offer a rare win-win strategy combining profitable food production with rapid improvement of soil quality and short-term climate mitigation through soil C-accumulation.

In the paper Figure 2 shows nicely how rapidly Carbon accumulated in soils with a return to the content of native forest  soils in a decade!

The worst is never certain but ideologized people use it to their aims.

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