Why would you plough heavy land in January? I think you know quite well enough that i am describing a well planned and executed operation!
OSR & second wheat compared to pulses and linseed are high margin, sugar beet also plays a useful role even on boulder clay. Point is as i suspect you are very aware that high input establishment done very well will consistently year after year return a consistently higher return
People do. You're right - heavy land would be best ploughed/pressed in Sept/Oct then sprayed off in March with the seed stiched straight into a decent frost mould. You talk about high margin - gross or net? I work towards net margin per tonne not gross margin/ha. Sustainability etc etc. I've done heavy land high input/high output cropping based on an Excel spreadsheet that said wheat/wheat/osr was the best. It resulted in multi resistant blackgrass and ever declining yields.