Gardening and farming with rockdust

Science on the Land

On the allotment site in Northern England where I grow food, there’s a fashion for rockdust. Some of my neighbours swear by it. I’m not tempted, and my plot’s the envy of the site (well it was so, until my worsening disability put a kibosh, but that’s another story).

I’m not tempted by rockdust partly because I distrust any claim about ‘soil remineralisation’ that doesn’t involve naming minerals, appropriate to particular sites. You can find a list of what’s in the rockdust online, but I’ve seen nothing about what that means in practice.

There’s plenty of calcium and magnesium in there. Calcium carbonate is also known as lime, used by many gardeners (including me) to raise soil pH. It’s often used with magnesium sulphate, also known as Epsom salt. Epsom salt can be made from magnesium oxide. Here’s what the European Commission says about the lime, magnesium oxide and…

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About Dr. Bukar USMAN, mni

I started as a field Veterinary officer with the Borno State Ministry of Agriculture and later joined College of Agric, maiduguri as a lecture & a researcher in the Department of Animal Health & Production. I was appointed the Provost of the College In 2003. In 2007 I was appointed Hon. Commissioner & Member Borno State Executive Council and later appointed Permanent Secretary with the Borno State Civil Service in 2009. I was the National Facilitator Animal Health, National Programme For Food Security of the Federal Ministry of Agric & Rural Development, Abuja. I am now the Director, Veterinary Medicine & Allied Products (VMAP) NAFDAC. I’m a member of the National Institute’ (mni), Kuru SEC 40, 2018. I engaged myself in various aspects of the veterinary profession. I founded Sril Group Ltd, Nigeria.
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