For both EFA and general cover crops, typical mixes I'm thinking of have various seed sizes which require various establishment depths.... I keep reading that drilling much below 10mm for the small seeds will severely hamper their germination, but that's too shallow for other seeds in the mix.... Say something likes oats + phacelia + buckwheat + vetch / clover... Is it best to tank mix them and drill them (disc drill) together very shallow or... ...broadcast on the phacelia and vetch with a spinner on the back of the quad then drill the oats and buckwheat at a depth (the drilling process will put a spread of soil on some of the broadcast seed) or... ...the same process but opposite way around - drill then broadcast? Any operation with the broadcasting would get rolled at the end. Most likely straw will be baled beforehand. Thoughts and folks experiences appreciated.