According to the Irish experts, 16" deep too!
New research from Teagasc has shown that deep ploughing of grassland could result in 1t/ha more carbon being sequestered on reseeded grassland.
The double digger though only cultivated the subsoil, it left it under the topsoil where it belongs.It's certainly an interesting idea, although I am not sure that carbon sequestration is about effectively locking away the biologically active layer of your soil away 16" below ground. Carbon is continually cycled and I would guess that the best long term sequestration is achieved through increasing that cycling by building up microbiological activity and populations.
Yes, sorry, my fault for posting the article about the double digger, two different processes at play, I was just reminded of it by this talk of deep ploughing.This was the part of the article that gave the impression that topsoil was being buried...
“Teagasc has stated that ploughing to 40cm (16 inches) results in carbon-rich top soil being deposited to lower levels of the soil, which protects carbon stocks.”
No worries, not heard of the double digger before seeing this thread. You learn something every day on the FF.Yes, sorry, my fault for posting the article about the double digger, two different processes at play, I was just reminded of it by this talk of deep ploughing.
Blame my father for a lot of reclaimed land in North Lincs next to the River Humber with the War-Ag crawler and plough.Deep ploughing using steam engines and prompted by War-Ag in 1944 really messed up a field of heavy clay next to my farm, it hasn't really recovered yet
They are talking about ploughing an actual desert in that article!16 inches would be hard to avhieve mist places i would guess, I know There's not much grou d around here that can be safely ploughed deeper than 8 or 9 inches. Either because its to close to shale or stone or clay .
One-off soil inversion results in the complete burial of the water repellent topsoil in a layer typically at a depth of 15 to 35 cm, and brings to the surface a layer of wettable subsoil. Other benefits include burial of herbicide resistant weed seeds, removal of compaction, improved access to...www.agric.wa.gov.au