- Location
- Chipping Norton
No! Agreeing to disagree.
High magnesium soils
- Thread starter Wobblebox
- Start date
average farmer
Member
- Location
- North Notts
Farming high mag soils (even the lighter stuff) I’ve been quite interested in this thread. Thank you @Warnesworth for sharing your opinion, I’m not saying it’s right or wrong but interesting stuff
Cab-over Pete
Member
- Location
- Kenilworth, Warwickshire
It is all very interesting, I love it. I wish I had more time (and a bit more brain power) to take it all in.
I think soil science/ health/ biology is a subject you could never even know half of.
I think soil science/ health/ biology is a subject you could never even know half of.
- Location
- Chipping Norton
Here is a perfect example of a low magnesium soil that actually is a high magnesium soil.
In the top box on the attached photo page the Magnesium index is 1, and a pH of 8.3, so a typical 'RB209' recommendation would be kieserite.
BUT if you move down to the base saturations in the second box you can see that the calcium percentage is huge (89%) and the magnesium is very low 3.8%. But the effective magnesium percentage is 25% which is very high, and there is over 6 tonnes of total magnesium/hectare.
So the actual conclusion is we don't need to add any more magnesium, and if we did, it wouldn't alter the index or the base saturation because of all the calcium within the soil.
