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Is this the GSP you are talking about?
04/11/2021
The GSP has issued a stark warning based on the latest analysis and facts pointing out that synthetic nitrogen fertilizers are responsible for approximately 38 percent of agricultural emissions derived from the release of soil nitrous oxide (N2O) – found in synthetic fertilizers, manure and crop residues. The impacts extend to the economic and social spheres, since the agriculture-derived nitrogen emissions account for economic losses of around $200 billion USD annually. Moreover, the costs for human health and the impact on aquatic and terrestrial ecosystems amount to $400–4000 billion USD annually.
From what I have read about Source is that it is only guaranteed on good ground. Not for use on sandy or clay soils.
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biological nitrogen in dry or wet areas, Pivot Bio, etc.,
