I'd like to see someone make an autonomous 3m system chameleon type drill that can sow cover crops in early June between the cash crop rows without trashing it. Then organic systems could be much much more productive.
In my issue #100 in Feb-May 2017 we featured a farm built inter-row drill that put three rows of ryegrass seed into standing maize when it was about welly high. The maize controlled the grass until harvest when it romped away and the system is popular around his Shropshire base. Would it work with cereals sown on wide row spacing?