But once the wood chips have been broken down the nitrogen returns to the soil, along with the other constituents, so any nitrogen depletion is only short term. I would only be concerned if wood chips were being dug into a brassica bed or similar.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
As the air we breathe is about 78% nitrogen, I'd guess , if mulched, chipping can obtain the nitrogen needed that way , rather than " depleting" nitrogen tied up in the soil.
I'm no chemist, but it was explain why all the research I've read says no depletion takes place unless it's dug into the soil.
I'd happily see any research which clears things up once and for all. I go through about 20 tons of the stuff a year.
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But once the wood chips have been broken down the nitrogen returns to the soil, along with the other constituents, so any nitrogen depletion is only short term. I would only be concerned if wood chips were being dug into a brassica bed or similar.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Thanks for all your replies.
As the air we breathe is about 78% nitrogen, I'd guess , if mulched, chipping can obtain the nitrogen needed that way , rather than " depleting" nitrogen tied up in the soil.
I'm no chemist, but it was explain why all the research I've read says no depletion takes place unless it's dug into the soil.
I'd happily see any research which clears things up once and for all. I go through about 20 tons of the stuff a year.