In theory - Overhead savings of £100-200/ha, SFI of say £130 doing both advanced levels, carbon selling of £50-100 (even more in the future?), variable cost savings abit unknown as much more long term so cannot guess at that yet. They key is keep yielding the same and not having big reductions, it’s pointless otherwise and that’s the skill in it.I can see where you are coming from. However….
If you choose a good year to start DDing and/or soils are in good condition, such as soon after harvesting the previous crop or growing a cover crop in between crops, not disturbing soil or disturbing it as little as possible will also provide enough drainage on what would become wetter soils on the late Autumn and Winter.
The previous decaying crop roots and the earthworms you didn’t kill will provide your drainage and the longer you have been doing DD, the Organic Matter builds up to both hold onto moisture in a drought and drain it away in times of excess water. The soils become more alive rather than getting deader and deader, the more times you Power-Harrow it, therefore building up ever increasing problems of needing more fertilisers and sprays to achieve yield.
Because you didn’t disturb the soil, you no longer need floatation wheels to stop ruts in the tramlines.
Some of my tramlines are now in their 4th crop of use without any ruts whatsoever!
The only thing that you have to get used to, is looking at what might look as a stubble field of the previous crop until the following Spring, because it is taller than the crop you are now growing.
We are all on the cusp of having to yet again learn a completely new system of support as BPS is lost to be replaced by a revolutionary system of ELMs and SFI’s, which are frightening to comprehend, especially as they are not real farming.
However, here is a system that is real farming, totally logical when you think about it and understand it, which is nothing like as frightening and saves a busting shed load of money!
On top of which will earn points to be rewarded by ELMs and SFI cash.
So the same yields, less cash risked, ability to acces private markets and government incentives you are £300-450/ha up from the start before you start getting into the more long term agronomic benefits of it which is harder to quantify.
that a reasonable amount of wheat at these record high prices, at more normal prices you need about 3t/ha more in ploughed/min till to beat it for true NET margin.