Picture posting is enabled for all :)
Roy, The Report was published in the late 1950s or very early 1960s. It was discussed in one of the horticultural magazines of the day, and I sent my postal order to Rothamstead and obtained a summary. The findings were complete and unequivocal, and also explained to me why my own heavy clay was heavier and stickier than before I started using the machine. Unfortunately I lent it my copy to a nurseryman of my acquaintance several years later and never saw it again.
It all, of course, happened before you were born.