Below is some of the best info on harvesting grains with a scythe, that I've ever come across. It's three videos that I discovered on YouTube.
Part 1 - In the video above, some old-timers get together to demonstrate how they used to harvest grain in the old-days. At 3:00 and 3:54, notice the type of grain-cradle that is used with the "Austrian" scythe. Also notice at 3:14, that he is mowing, what I call "into the wall" with each stroke. The cut stems are gathered and pressed against the standing stems by the grain-cradle, to help them stay in line. This makes it easier to gather into uniform sheaves.