nitrogen

Nitrogen is one of the most important nutrients for soils and Africa doesn't have enough. Reuters/Siphiwe SibekoAfrican soils have been mined for their nutrients for far too long. Nutrients are removed in harvesting across the continent, but they aren’t being returned to the soil. This usually happens in the form of manures or fertilisers. As with a bank so too with soil: … [Read more...] about What can be done about badly depleted nitrogen levels in Africa’s soil | The Conversation