Its interesting how our different cultivars react to drought stress in terms of nut shape. To document these changes in nut shape, I've collected nuts from several cultivars then arranged them in order of increasing drought stress.As drought stress increases, all pecan cultivars produce smaller nuts. However, there can be other changes as well. Note that the base of Giles and Maramec nuts get narrow as compared apex of the pecan. A nut with a strongly tapered base means that the kernels inside will also be strongly tapered. In comparison, Kanza and Major nuts just seem to shrink, turning into smaller, rounder pecans.