An old approach to wheat cultivation in which a field is sown with a genetically diverse population of wheats instead of just one variety of genetically undiverse wheat. (This latter monoculture approach is how nearly all modern wheat is grown.) As a population, a population wheat has enhanced environmental perception and enhanced adaptation ability—it's wheat with the uncertainty mindset. If you want to read more about this (and who wouldn't?), start with #15: Maintenance by design.